The FPB stainless steel natural gas flame arrester is a flame arrestor safety device installed on gas transmission and distribution pipelines, specifically designed to prevent flame propagation in combustible gas pipelines. It features an internal stainless steel corrugated plate flame arrestor element, utilizing the tiny gaps between the corrugated plates to quench flames, effectively preventing backfire explosions. This flame arrester can be configured as deflagration or detonation type to suit various pipeline lengths and installation locations. Its core purpose is to be installed on natural gas, LPG, coal gas pipelines at regulator station outlets, customer inlets, burner supply lines, and vent systems, blocking flame propagation during accidental backfire to protect downstream equipment, personnel, and the environment.Product Drawing of FPB stainless steel natural gas flame arresterFeatures:1. Threaded connections for easy installation: Standard female or male threads (such as NPT, G, M threads) allow direct screwing into pipeline or equipment ports without flange welding, ideal for small-bore piping. 2. Corrugated plate flame arrestor element: Alternately wound multi-layer stainless steel corrugated and flat strips form uniform narrow passages, providing high flame arresting efficiency with low pressure drop. 3. Bidirectional flame arresting: Capable of blocking flame propagation from either direction, suitable for small gas pipeline systems where combustion may initiate from either side. 4. Compact structure and light weight: Small size and light weight make it ideal for space-limited installations such as instrument cabinets, small tanks, or skid-mounted equipment. 5. Corrosion and high temperature resistance: Element and housing made of 304 or 316L stainless steel, resistant to corrosive gas environments and short-term high-temperature flame impact. 6. Easy maintenance: The flame arrestor element can be extracted from the housing for periodic cleaning of carbon deposits or impurities; threaded connections facilitate disassembly without special tools. 7. Code compliant: Designed and manufactured according to GB 5908, ISO 16852 and other standards, meeting fire and explosion protection requirements for small-bore flame arresters.

The FZT flame arrestor vent cap is an integrated flame arresting and venting device installed on the vent ports of small tanks, fuel oil tanks, or high points of pipelines. It features a built-in stainless steel corrugated plate flame arrestor element, allowing free gas flow in and out of the tank due to pressure changes (breathing) while effectively preventing external flame ingress. The housing is available in aluminum alloy, cast steel, or stainless steel to suit general environments, highpressure or corrosive media, and highly corrosive or highpurity applications respectively. Its core purpose is to provide combined flame arrestor protection and atmospheric venting for small tanks in petroleum, chemical, gas stations, generator fuel tanks, small solvent storage tanks, and day tanks, maintaining tank pressure balance while preventing backfire explosions.FZT flame arrester vent cap (aluminum alloy, cast steel, stainless steel) product drawing1. Integrated flame arrestor and venting: Built-in stainless steel corrugated plate flame arrestor element allows normal breathing while effectively quenching external flames, preventing propagation into the tank. 2. Three housing material options: Aluminum alloy (lightweight, weather‑resistant), cast steel (high pressure, impact‑resistant), stainless steel (high corrosion resistance, clean), suitable for various media and installation environments. 3. Large venting capacity with low pressure drop: High porosity (≥90%) of the flame arrestor element minimizes gas flow resistance without affecting normal tank breathing efficiency. 4. Complete protection structure: Top rain cover and insect screen prevent rain, dust, and insects from entering, suitable for outdoor installation. 5. Flexible connection options: Available with pipe threads (such as NPT, G, R threads) or flanged connections, allowing direct screwing onto vent ports for easy installation. 6. Easy maintenance: Removable flame arrestor element for cleaning; periodic removal of carbon deposits or impurities allows reuse without complete replacement. 7. Compact structure and light weight: Small footprint suitable for space-limited small tanks or equipment vent lines. 8. Compliant with relevant standards: Designed and manufactured according to GB 5908, ISO 16852 flame arrester standards and vent cap specifications.

The GHF-1 explosion-proof flame arrestor vent cap is a explosion-proof flame arresting venting device installed on the vent ports of small tanks, fuel oil tanks, or pipeline vents. It features a built-in stainless steel corrugated plate flame arrestor element, allowing free gas breathing due to pressure changes while effectively preventing external flame ingress and backfire explosions. The housing adopts an explosion-proof design, with a rain cover and insect screen on top. Its core purpose is to provide combined explosion-proof, flame arrestor, and atmospheric venting functions for gas station underground tanks, generator fuel tanks, small oil tanks, chemical solvent drums, and day tanks, ensuring tank pressure balance and fire safety.GHF-1 explosion-proof fire-resistant breather cap product diagram Features:1. Integrated explosion-proof and flame arresting: Built-in stainless steel corrugated plate flame arrestor element effectively quenches external flames while meeting installation requirements in hazardous areas. 2. Complete breathing function: Allows free gas flow in/out due to temperature changes or liquid transfer, maintaining atmospheric pressure and preventing overpressure or vacuum. 3. Explosion-proof housing design: Made of aluminum alloy or cast steel with high structural strength to withstand accidental impact, suitable for flammable and explosive environments. 4. Complete protection structure: Top rain cover, insect screen, and internal drainage prevent rain, dust, and insects from entering, suitable for outdoor installation. 5. Flexible connection: Available with pipe threads (NPT, G, R) or flanged connections for direct screwing onto vent ports, easy installation. 6. Corrosion-resistant options: Housing available in aluminum alloy (lightweight weather-resistant), cast steel (high pressure), or stainless steel (highly corrosive environments) to suit various conditions. 7. Easy maintenance: Removable flame arrestor element for cleaning; periodic carbon deposit removal allows reuse without complete replacement. 8. Compliant with standards: Designed and manufactured according to GB 5908, ISO 16852, and other standards, with explosion-proof certification.

The GLY-150 American standard foot-operated dip hatch is a specialized measuring hatch installed on the top of storage tanks, designed and manufactured in strict accordance with American standards (ANSI/API) . It features a foot‑operated opening mechanism that allows the operator to step on a pedal to automatically open the cover for measuring liquid level, temperature, and taking oil samples. The device includes a dipping guide tube, an elastic sealing structure, and a dust cover to effectively prevent vapor leakage and ingress of external contaminants. Its core purpose is to provide a convenient, safe, and American standard‑compliant access for liquid level measurement and sampling of storage tanks in industries such as petroleum, chemical, oil depots, and gas stations, reducing operator labor intensity while minimizing vapor loss and safety hazards Product Drawing of GLY-150 American standard foot-operated gauging hatch Rotary gauging hatchcharacteristic1. American standard design for reliable compliance: Meets API and ANSI requirements, with flange dimensions, sealing types, and face‑to‑face dimensions fully compatible with international practice. 2. Foot‑operated for labor‑saving convenience: The cover is opened by stepping on a pedal, eliminating the need for manual lifting and allowing operators to use both hands for measurement, significantly reducing labor intensity. 3. Reliable sealing with zero leakage: The cover and seat are equipped with oil‑resistant rubber or fluororubber sealing rings, providing zero leakage when closed, effectively preventing vapor loss and ingress of external contaminants. 4. Guide tube design for accurate measurement: An internal dipping guide tube ensures that the dip tape or sampling tube enters the tank vertically, guaranteeing accurate measuring points and avoiding sticking. 5. Dust and rain protection structure: The top features a dust‑proof flip cover to prevent rain, dust, and debris from falling into the hatch, suitable for harsh outdoor environments. 6. Corrosion‑resistant materials: The housing is made of aluminum alloy, cast steel, or stainless steel; seals are made of oil‑resistant rubber or fluororubber, suitable for various media such as oil products and chemical solvents. 7. Safe operation with optional lock: An optional locking device prevents unauthorized access, enhancing tank farm safety. 8. Easy installation and maintenance: Standard American standard flange connection for direct mounting to tank flanges; foot mechanism and seals are easy to replace, keeping maintenance simple.

The GRK tank wall manhole is a personnel access and inspection opening installed on the lower or middle sidewall of storage tanks. It features an elliptical or circular structure, with the flange welded directly to the tank shell. The manhole cover is equipped with a hinge, handwheels, and fastening devices, allowing quick opening when needed for operators to enter the tank for cleaning, inspection, maintenance, or replacement of internal equipment. Its core purpose is to provide a safe and convenient man-entry access for fixed roof tanks, floating roof tanks, and other large storage tanks in petroleum, chemical, and storage/transportation industries , while maintaining tight sealing after closure with gaskets and fasteners to prevent media leakage and ingress of external contaminants.GRK tank wall manhole product drawingFeatures1. High structural strength for safety and reliability: Carbon steel or stainless steel reinforced construction provides high pressure resistance, meeting tank operating pressures and external load requirements. 2. Easy opening/closing with labor-saving operation: Equipped with handwheel or screw-type fastening mechanisms combined with hinges, allowing one person to easily open or lock the manhole cover. 3. Reliable sealing with zero leakage: Sealing surfaces use oil-resistant rubber (NBR), fluororubber (FKM), or PTFE gaskets to achieve tight media sealing after closure. 4. Flexible installation options: Flanged connection welded to tank shell; available in elliptical (approx. 300×400mm to 600×800mm) or circular (DN500, DN600) sizes to suit various tank constructions. 5. Corrosion-resistant materials: Body available in carbon steel (with anti-corrosion lining), 304/316L stainless steel; gasket materials suitable for oil products, chemical solvents, water, and other media. 6. Safety and explosion-proof design: Some models may feature explosion-proof locking devices or anti-static bonding to meet fire and explosion protection requirements for petrochemical tank farms. 7. Long service life with easy maintenance: Robust cast or welded construction resists deformation; gaskets are quickly replaceable; hinges and fasteners remain flexible with periodic lubrication. 8. Compliant with national standards: Designed and manufactured according to HG/T 21516 “Turnover cover plate type flanged manholes” or relevant tank accessory standards.

The GTQ vent pipe/vent cap is an air exchange device installed on the vent nozzle of atmospheric or low‑pressure storage tanks. It consists of a rain cover, an insect screen, and a straight or elbow‑type housing, allowing free gas flow in/out of the tank due to liquid transfer or temperature changes, automatically balancing the pressure difference between the tank and the atmosphere, and preventing deformation or rupture caused by overpressure or vacuum. Its core purpose is to provide safe and efficient venting for atmospheric tanks such as water tanks, oil tanks, chemical tanks, and food tanks, with an optional flame arrestor layer to meet fire and explosion protection requirements.Product Drawing of GTQ vent capFeatures: 1. Free venting for automatic pressure balance: Straight or elbow structure provides an unobstructed gas passage, automatically balancing tank pressure without moving parts, ensuring high reliability. 2. Rain and dust protection design: Top rain cover prevents rain, dust, and debris from entering the tank; optional insect screen prevents insects and birds from entering. 3. Optional flame arrestor function: Can be equipped with a stainless steel corrugated flame arrestor layer to prevent external flames from entering the tank through the vent pipe, meeting fire protection codes. 4. Large venting capacity with low pressure drop: Large flow cross‑sectional area minimizes gas flow resistance, meeting venting requirements during rapid filling and discharging. 5. Multiple corrosion‑resistant materials: Housing available in carbon steel, stainless steel, aluminum alloy, or plastic (UPVC/PP) to suit various media such as water, oil, chemicals, and outdoor environments. 6. Simple structure with easy installation and maintenance: Standard flange or threaded connections for easy installation; removable rain cover and insect screen for convenient cleaning, low maintenance cost. 7. Wide application range: Suitable for vent piping of atmospheric tanks in water treatment, petrochemical, food and beverage, environmental protection, and other industries. 8. Compliant with relevant standards: Designed and manufactured according to SH/T 3007 “Design specification for tank farm of petrochemical storage and transportation system” and other standards.

The GZW-1 deflagration flame arrester is a flame arrestor safety device installed on flammable gas pipelines, specifically designed to prevent the propagation of subsonic flames (deflagration) through the piping system. It employs a stainless steel corrugated plate flame arrestor element, which quenches flames through the narrow gaps between the corrugated plates, confining the flame to one side of the pipeline and preventing it from reaching downstream equipment or storage tanks. This flame arrester is suitable for applications where combustible gas combustion may occur within the pipeline with flame propagation speeds below sonic velocity. Its core purpose is to be installed on vapor recovery lines, vent systems, fuel gas pipelines, or ventilation ducts to block flame propagation during accidental combustion, protecting upstream and downstream equipment, personnel, and the environment, while meeting fire and explosion protection codes in industries such as petrochemical and gas transmission and distribution.Product Drawing of GZW-1 deflagration flame arresterFeatures: 1. Specifically for deflagration flame arresting: Optimized design for subsonic flame (deflagration, flame speed typically ≤0.6 Mach) with high flame arresting efficiency, suitable for long pipelines or confined spaces where flame propagation may occur. 2. Corrugated plate flame arrestor element: Alternately wound multi-layer stainless steel corrugated and flat strips form uniform triangular/rectangular narrow passages, providing very short flame quenching distance and stable reliable performance. 3. Bidirectional flame arresting: Capable of blocking flame propagation from either direction, suitable for piping systems where combustion may initiate from either side. 4. Large flow area, low pressure drop: High porosity (≥90%) of the flame arrestor element minimizes gas flow resistance without affecting normal pipeline flow capacity. 5. Corrosion and temperature resistance: Element and housing made of 304/316L stainless steel, resistant to short-term high-temperature flame impact and corrosive media environments. 6. Compact structure, easy installation: Standard flange interfaces match pipeline; can be installed horizontally or vertically; removable housing allows easy extraction of the element for cleaning. 7. Compliant with standards: Designed and manufactured according to GB/T 13347, ISO 16852, EN 12874 and other standards, certified by authorized testing agencies. 8. Easy maintenance: Flame arrestor element can be periodically extracted for cleaning of carbon deposits or impurities and then reinstalled, eliminating the need for complete replacement.

The HHGS07 wire mesh flame arrester is a flame arrestor safety device installed on flammable gas pipelines or tank vent nozzles. It uses multi-layer stainless steel wire mesh as the flame arresting element, quenching flames through the fine pores of the mesh to effectively prevent external flame propagation to upstream pipelines or storage tanks. It features a simple structure, large flow area, and low pressure drop. Its core purpose is to be installed in vapor recovery systems, vent lines, small tank breather pipes, burner supply lines, etc., to rapidly block flame during accidental backfire, protecting equipment and personnel.Product Drawing of HGS07 wire mesh flame arresterFeatures: 1. Wire mesh flame arresting element: Made of multiple layers of pressed stainless steel wire mesh, providing uniform and fine pores for stable flame arresting performance with economical cost. 2. Large flow area, low pressure drop: High porosity of the mesh structure minimizes gas flow resistance without affecting normal system venting. 3. Simple structure, easy maintenance: No complex moving parts; the mesh can be removed for cleaning or replacement, resulting in low maintenance cost. 4. Multiple housing materials: Available in aluminum alloy, carbon steel, or stainless steel to suit various corrosive environments and pressure ratings. 5. Flexible connection options: Threaded or flanged connections are available for quick installation on small-bore pipelines (DN15～DN200). 6. Short-term high temperature resistance: Stainless steel mesh withstands instantaneous flame temperatures without burning or deforming easily. 7. Suitable for deflagration: Applicable for subsonic flame deflagration conditions; not suitable for stable detonation. 8. Compliant with relevant standards: Designed and manufactured according to GB/T 13347, ISO 16852, and other standards.

The HX/HXF-1 two-way dual-nozzle breather valve is a two-way breather valve installed on the top of fixed roof tanks, featuring two independent external piping connections (dual nozzles) for vent gas discharge and intake gas supply respectively, integrating pressure relief, vacuum intake, and flame arrestor functions. When the tank pressure exceeds the set value, the pressure disc opens to discharge volatile vapors through the flame arrestor and one nozzle to a recovery or treatment system; when vacuum occurs inside the tank, the vacuum disc opens to introduce blanketing gas (e.g., nitrogen) or air through the other nozzle to maintain pressure balance. Its core purpose is to achieve controlled emission of tank breather vapors and safe gas intake, while the built-in flame arrestor prevents external flame ingress, meeting environmental, safety, and explosion-proof code requirements.、HX and HXF-1 bidirectional dual-nozzle breather valve product diagram Features:1. Dual-nozzle design: Two independent connections for vent gas discharge and intake gas supply, facilitating connection to external recovery and blanketing systems. 2. Two-way breathing function: Pressure disc and vacuum disc operate independently, providing both overpressure relief and vacuum intake protection. 3. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards. 4. Set-pressure operation with reliable sealing: Flat or tapered hard seal ensures stable opening pressure and zero leakage when closed. 5. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 6. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; discs and flame arrestor core in stainless steel for various corrosive media. 7. Large ventilation capacity with low pressure drop: Optimized flow path provides low breathing resistance for both venting and gas intake during rapid tank filling or discharging. 8. Easy maintenance: Removable flame arrestor core for cleaning; simple disc assembly disassembly for periodic inspection and maintenance.

The HX3/HXF3 breather valve with suction nozzle is a two-way breather valve installed on the top of fixed roof tanks, featuring an independent suction nozzle (for connecting nitrogen or other blanketing gas) and a venting passage, integrating pressure relief, safe vacuum intake, and flame arrestor functions. When the tank pressure exceeds the set value, the pressure disc opens to discharge volatile vapors through the flame arrestor to the atmosphere or a recovery system; when vacuum occurs inside the tank, the vacuum disc opens to introduce blanketing gas (e.g., nitrogen) or air through the suction nozzle, rapidly restoring tank pressure. Its core purpose is to automatically supply dry inert gas via the suction nozzle during tank discharging or sudden temperature drops, preventing air from entering the tank and forming explosive mixtures, while also providing overpressure relief and flame arrestor protection to ensure tank safety and product quality.HX3 and HXF3 breather valves with connection pipe product diagram Features:1. Independent suction nozzle design: Dedicated suction nozzle can be connected to a nitrogen supply line or air filter for controlled gas intake, preventing direct ingress of humid air or dust during tank vacuum conditions. 2. Two-way breathing function: Pressure disc and vacuum disc operate independently for overpressure relief and vacuum intake; pressure settings adjustable as required. 3. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks flame propagation, meeting petrochemical tank fire protection standards. 4. Set-pressure operation with reliable sealing: Flat or tapered hard seal ensures stable opening pressure and zero leakage when closed. 5. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 6. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; discs and flame arrestor core in stainless steel for various corrosive media. 7. Large ventilation capacity with low pressure drop: Optimized flow path provides low breathing resistance for both venting and gas intake during rapid tank filling or discharging. 8. Easy maintenance: Removable flame arrestor core for cleaning; simple disc assembly disassembly; suction nozzle with standard interface for easy connection.

The HX-4/HXF-4 breather valve with dual nozzles is a two-way breather valve specifically designed for fixed roof storage tanks. It features two independent piping connections (dual nozzles) respectively for “overpressure relief” and “vacuum intake”. When tank pressure rises, the pressure disc automatically opens and gas is discharged through one nozzle to a recovery network; when vacuum occurs, the vacuum disc opens and nitrogen or purified air is admitted through the other nozzle. A stainless steel corrugated flame arrestor can be installed inside to prevent external flame ingress. Its core purpose is to achieve separated breathing management – centralized recovery of vent gas and controlled gas intake, meeting the combined requirements of vapor recovery, nitrogen blanketing, and fire/explosion protection.HX-4 and HXF-4 breathing valves with dual connection pipes product diagram Features: 1. Dedicated dual‑nozzle functions – Vent nozzle exclusively for discharge; intake nozzle exclusively for gas supply, avoiding interference. 2. Set‑pressure operation with reliable sealing – Pressure and vacuum discs open independently at their set values; tapered hard seal ensures zero leakage after reseating. 3. Optional flame arrestor – Built‑in stainless steel corrugated plate element quenches flames in both directions, meeting tank fire safety codes. 4. High ventilation capacity, low resistance – Optimized flow path provides low breathing resistance, suitable for rapid filling/emptying with high flow rates. 5. Multiple corrosion‑resistant materials – Housing available in aluminum alloy, carbon steel, or stainless steel; internal parts in stainless steel, suitable for oil, solvents, and chemicals. 6. All‑weather protection – Top rain cover, insect screen, and internal drainage slots prevent ingress of rain and debris. 7. Easy maintenance – Disc assembly can be removed as a whole; the optional flame arrestor element can be pulled out for cleaning without hot work or pipeline disassembly.

The HX5/HXF5 tank flame arrestor single breather valve is a one-way pressure-relief flame arrestor breather valve installed on the top of fixed roof tanks, allowing tank gas to vent outward only when overpressure occurs, while remaining tightly closed when the tank pressure is below the set value. The valve features a built-in stainless steel corrugated plate flame arrestor core to effectively prevent external flame ingress, and is equipped with standard flange connections for piping to a recovery system or direct atmospheric discharge. Its core purpose is to automatically release excess gas during tank filling or temperature rise to prevent overpressure deformation, while blocking flame propagation. It is suitable for tanks already equipped with independent gas intake devices (such as nitrogen blanketing systems) or where air ingress is not permitted.HX5 and HXF5 flame arrester single exhalation valves for storage tanks product diagram Features:1. One-way relief function: Only the pressure disc operates, automatically opening during overpressure without vacuum intake; suitable for tanks with separate gas supply systems. 2. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards. 3. Set-pressure operation with reliable sealing: Flat or tapered hard seal provides stable opening pressure and zero leakage when closed. 4. Large venting capacity with low pressure drop: Optimized flow path ensures low breathing resistance, meeting venting demands during rapid tank filling. 5. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 6. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; disc and flame arrestor core in stainless steel for various corrosive media. 7. Flexible connection options: Standard flange connections allow horizontal or vertical installation, facilitating connection to recovery piping or atmosphere. 8. Easy maintenance: Removable disc assembly; flame arrestor core can be extracted for cleaning, facilitating periodic inspection and maintenance.

The HX6/HXF6 single breather valve is a one-way pressure-relief breather valve installed on the top of fixed roof tanks, featuring a large flow path design optimized for high venting capacity requirements. When the tank pressure exceeds the set value, the pressure disc automatically opens to release excess gas; it reseals tightly when pressure returns to normal. The valve can be optionally equipped with a built-in flame arrestor and features standard flange connections for piping to a recovery system or direct atmospheric discharge. Its core purpose is to achieve efficient, set-pressure venting during rapid tank filling, high ambient temperature, or nitrogen purging conditions that generate large volumes of volatile gases, preventing overpressure deformation while reducing media evaporation loss. It is suitable for tanks that are insensitive to vacuum or already equipped with independent gas intake devices.HX6 and HXF6 flame arrester single inhalation valves product diagram Features:1. One-way relief function: Only the pressure disc operates, automatically opening during overpressure without vacuum intake; suitable for tanks with separate gas supply systems. 2. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards. 3. Set-pressure operation with reliable sealing: Flat or tapered hard seal provides stable opening pressure and zero leakage when closed. 4. Large venting capacity with low pressure drop: Optimized flow path ensures low breathing resistance, meeting venting demands during rapid tank filling. 5. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 6. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; disc and flame arrestor core in stainless steel for various corrosive media. 7. Flexible connection options: Standard flange connections allow horizontal or vertical installation, facilitating connection to recovery piping or atmosphere. 8. Easy maintenance: Removable disc assembly; flame arrestor core can be extracted for cleaning, facilitating periodic inspection and maintenance.

The HX7/HXF7 nozzle flame arrestor single breather valve is a one-way pressure-relief flame arrestor breather valve installed on the top of fixed roof tanks, featuring an external piping connection (with nozzle). It allows tank gas to vent outward only when overpressure occurs, while remaining tightly closed when the tank pressure is below the set value. The valve incorporates a built-in stainless steel corrugated plate flame arrestor core to effectively prevent external flame ingress, and directs the vented volatile vapors through the nozzle to a recovery system or flare line. Its core purpose is to automatically release excess gas at set pressure during tank filling or temperature rise to prevent overpressure deformation, while blocking flame propagation and directing the vented gas to centralized treatment facilities. It is suitable for tanks already equipped with independent gas intake devices or where air ingress is not permitted, meeting both environmental recovery and fire/explosion protection requirements.HX7 / HXF7 single exhaust flame arrester valves with connecting pipe product diagram Features:1. One-way relief function: Only the pressure disc operates, automatically opening during overpressure without vacuum intake; suitable for tanks with separate gas supply systems. 2. Nozzle design: Standard flange or threaded connection directs vented gas to a recovery pipeline, flare system, or scrubber, avoiding direct atmospheric discharge. 3. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards. 4. Set-pressure operation with reliable sealing: Flat or tapered hard seal provides stable opening pressure and zero leakage when closed. 5. Large venting capacity with low pressure drop: Optimized flow path ensures low breathing resistance, meeting venting demands during rapid tank filling. 6. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 7. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; disc and flame arrestor core in stainless steel for various corrosive media. 8. Easy maintenance: Removable disc assembly; flame arrestor core can be extracted for cleaning; standard nozzle interface facilitates piping connection and periodic maintenance.

The HX8/HXF8 nozzle flame arrestor single intake valve is a one-way vacuum-breaker flame arrestor breather valve installed on the top of fixed roof tanks, featuring an external piping connection (with nozzle) specifically for vacuum intake protection. When the tank vacuum exceeds the set value, the vacuum disc automatically opens to introduce blanketing gas (such as nitrogen) or air through the nozzle, rapidly restoring tank pressure; the valve closes tightly when normal pressure returns. The valve incorporates a built-in stainless steel corrugated plate flame arrestor core to effectively prevent external flame ingress through the intake passage. Its core purpose is to automatically and controllably admit gas during tank discharging, emptying, or sudden temperature drops to prevent tank collapse or deformation, while avoiding direct intake of moist air or contaminants, and achieving centralized gas supply through the nozzle. It is suitable for tank systems requiring prevention of air ingress or equipped with independent pressure relief devices.HX8 and HXF8 flame arrester single inhalation valves with pipe connection product diagram Features:1. One-way intake function: Only the vacuum disc operates, automatically opening to admit gas when vacuum exceeds set point, without overpressure relief; suitable for tanks with independent pressure relief devices. 2. Nozzle design: Standard flange or threaded connection for piping to a nitrogen supply or air filter, enabling centralized and controlled gas intake. 3. Built-in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively prevents external flame ingress through the intake passage, meeting petrochemical tank fire protection standards. 4. Set-pressure operation with reliable sealing: Flat or tapered hard seal provides stable vacuum opening and zero leakage when closed. 5. Large intake capacity with low pressure drop: Optimized flow path ensures low intake resistance, meeting instantaneous high-volume gas demand during rapid discharging. 6. All-weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 7. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; disc and flame arrestor core in stainless steel for various corrosive media. 8. Easy maintenance: Removable disc assembly; flame arrestor core can be extracted for cleaning; standard nozzle interface facilitates piping connection and periodic maintenance.

The QFQ all-weather storage tank breather valve is an automatic pressure balancing device installed on the top of fixed roof tanks. It independently operates the pressure disc and vacuum disc to intelligently regulate the pressure difference between the tank interior and the atmosphere. When the tank pressure rises to the set opening pressure, the pressure disc opens to release excess gas; when the tank vacuum reaches the set value, the vacuum disc opens to admit external air, effectively preventing tank deformation or rupture due to overpressure or excessive vacuum. The valve features an all-weather rainproof and dustproof structure. Its core purpose is to provide safe and reliable breathing protection for various liquid storage tanks in petroleum, chemical, storage and transportation industries, automatically balancing the pressure difference inside and outside the tank during filling, discharging, or ambient temperature changes, reducing media evaporation loss, and ensuring tank structural safety and environmental compliance.QFQ all-weather tank breather valve product diagram Features:1. All-weather protection design: A rain cover on top prevents rain, dust, and debris from entering, ensuring normal operation in harsh weather. 2. Independent dual disc operation: Pressure and vacuum discs operate independently without interference, achieving precise control of set pressure and vacuum opening/closing. 3. Reliable sealing with set pressure opening/closing: Flat or tapered hard seals (soft seal ring optional) provide stable opening and reseating pressures with zero leakage when closed. 4. Multiple materials for corrosion resistance: Body available in cast steel, stainless steel, or aluminum alloy; discs and internal parts optionally in stainless steel or PTFE, suitable for oil, chemical solvents, and other media. 5. Optional flame arrestor structure: Can be equipped with an internal flame arrestor layer (corrugated plate or wire mesh) to prevent external flames from entering the tank, meeting fire protection requirements for petrochemical storage tanks. 6. Large ventilation capacity with low pressure drop: Optimized flow path ensures low breathing resistance and high capacity, maintaining stable pressure during rapid filling or discharging. 7. Easy maintenance: Simple structure with removable disc assembly for convenient periodic inspection and cleaning, ensuring breathing sensitivity. 8. Compliant with relevant standards: Designed and manufactured according to SY/T 0511 “Breathing valve for petroleum storage tank” and other standards.

The QHXF-89 all-weather anti-freeze flame arrestor breather valve is a safety protection device installed on the top of fixed roof tanks, integrating pressure/vacuum automatic regulation, flame arrestor, and anti-freeze functions. When the tank pressure exceeds the set value, the pressure disc opens to release excess gas; when the tank vacuum reaches the set value, the vacuum disc opens to admit air; the built-in flame arrestor layer effectively blocks external flame ingress; the valve body and internal structure feature an anti-freeze design to prevent ice formation in the condensed water at low temperatures, avoiding disc sticking. Its core purpose is to provide all-weather breathing protection for flammable and explosive media storage tanks in petroleum, chemical and other industries, automatically balancing tank pressure while providing fire and anti-freeze protection, ensuring safe tank operation and environmental compliance in harsh cold climates.QHXF-89 all-weather breathing valve product diagram Features1. Integrated anti-freeze design: The disc guide sleeve and sealing surfaces are made of special anti-freeze materials or equipped with electric tracing interfaces to prevent ice formation and disc failure at low temperatures, suitable for severe cold regions. 2. Fire and explosion-proof flame arrestor layer: Built-in stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire protection standards. 3. Independent dual disc operation: Pressure disc and vacuum disc operate independently for precise set-pressure relief and set-vacuum intake control. 4. Set-pressure operation with reliable sealing: Disc and seat adopt hard seal or composite soft-hard seal, with stable opening and reseating pressures and zero leakage when closed. 5. All-weather protection structure: Rain and dust cover on top with internal drain slots prevent water accumulation, suitable for various harsh environments. 6. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; discs and flame arrestor core in stainless steel for corrosive media. 7. Large ventilation capacity with low pressure drop: Optimized flow path ensures low breathing resistance and stable tank pressure during rapid filling or discharging. 8. Easy maintenance: Removable flame arrestor core for cleaning, simple disc assembly disassembly for periodic inspection and maintenance.

The QZF-89 all-weather fireproof and explosion-proof breather valve is a safety protection device installed on the top of fixed roof tanks containing flammable and explosive liquids, integrating pressure/vacuum automatic regulation, flame arrestor, and explosion-proof functions. When the tank pressure exceeds the set value, the pressure disc opens to release excess gas; when the tank vacuum reaches the set value, the vacuum disc opens to admit air; the built-in flame arrestor layer effectively prevents external flames from entering the tank, stopping fire spread. This valve is primarily used for breathing protection of flammable and explosive liquid storage tanks (such as gasoline, benzene, alcohols, etc.) in petroleum, chemical and other industries. Its core purpose is to automatically balance tank pressure while providing fire and explosion protection, ensuring safe tank operation and compliance with environmental and fire safety regulations.QZF-89 all-weather explosion-proof flame arrester breathing valve product diagram Features:1. Integrated explosion-proof and flame arrestor design: Combines breather valve and flame arrestor functions with built-in stainless steel corrugated plate flame arrestor layer to effectively block flame propagation. 2. Independent dual disc operation: Pressure disc and vacuum disc operate independently for precise set-pressure relief and set-vacuum intake control. 3. Reliable sealing with set pressure operation: Disc and seat adopt hard seal or composite soft-hard seal, with stable opening and reseating pressures and zero leakage when closed. 4. All-weather protection structure: Rain and dust cover on top with internal drain slots prevent water accumulation, suitable for harsh outdoor environments. 5. Corrosion-resistant materials: Body available in aluminum alloy, cast steel, or stainless steel; discs and flame arrestor core in stainless steel for corrosive media. 6. Large ventilation capacity with low pressure drop: Optimized flow path ensures low breathing resistance and stable tank pressure during rapid filling or discharging. 7. Easy maintenance: Removable flame arrestor core for cleaning, simple disc assembly disassembly for periodic inspection.

The TGK translucent manhole is a manhole device with a transparent window installed on the top or sidewall of storage tanks, integrating personnel access and visual inspection functions. A high-strength tempered glass or acrylic transparent plate is embedded in the center of the cover, allowing natural light to enter the tank and enabling intuitive checking of liquid level, foam, sediment, or equipment status without opening the cover. Its core purpose is to provide a safe access combining man-entry and visual monitoring for tanks in petroleum, chemical, food, water treatment, and other industries, especially in applications with poor internal lighting, requiring frequent inspection, and demanding minimized exposure to hazardous vapors. TGK light-transmitting manhole product drawingFeatures1. Translucent visual inspection function: A tempered glass or acrylic window is embedded in the center of the cover, providing ≥85% light transmittance for clear viewing of liquid level, foam, scaling, and internal component conditions. 2. Personnel access function: Retains standard manhole dimensions (e.g., DN500, DN600), allowing personnel wearing respirators to enter the tank for maintenance and cleaning. 3. High-strength safety glass: The window is made of tempered or laminated safety glass, resistant to impact and temperature changes; if broken, it shatters into blunt fragments, reducing injury risk. 4. Reliable sealing with leak prevention: The cover and flange sealing surfaces are equipped with oil-resistant rubber (NBR), fluororubber (FKM), or PTFE gaskets, achieving zero leakage when closed. 5. Optional explosion-proof protection: An outer stainless steel protective mesh can be added to prevent glass shard projection from external impact, meeting explosion protection requirements for petrochemical tanks. 6. Multiple corrosion-resistant materials: Body and cover available in carbon steel (with anti-corrosion lining), 304/316L stainless steel to suit various media such as oil, chemicals, and wastewater. 7. Labor-saving opening/closing: Hinges and handwheel fastening mechanisms allow one-person operation; optional gas springs or pneumatic struts can be added for assisted lifting. 8. Easy maintenance: The transparent glass and sealing gasket can be replaced on site without disassembling the entire manhole; regular cleaning of the glass surface maintains good light transmission.

The XYXA chemical storage tank breather manhole is a multi‑function safety device installed on the roof of fixed roof tanks, integrating manhole access with breather valve functions, combining personnel entry, overpressure relief, vacuum intake, flame arrestor, and explosion‑proof protection. When the tank pressure exceeds the set value, the pressure disc automatically opens to release excess gas; when vacuum occurs, the vacuum disc opens to admit air or blanketing gas; the built‑in flame arrestor effectively blocks external flame ingress; the manhole cover can be opened for personnel to enter the tank for cleaning or maintenance. Its core purpose is to provide a single safe interface for tanks in chemical, petroleum, storage & transportation, pharmaceutical and other industries that combines safe access, automatic pressure balancing, and fire/explosion protection, especially suitable for applications requiring reduced roof openings and enhanced safety.XYXA breathing manhole product diagram Features:1. Multi‑function integration: Combines manhole cover and breather valve into one unit, reducing roof openings and leakage points, simplifying installation and maintenance. 2. Set‑pressure breathing with automatic regulation: Independent pressure and vacuum discs automatically relieve overpressure and admit air under vacuum; pressure settings adjustable as required. 3. Built‑in flame arrestor: Stainless steel corrugated plate flame arrestor core effectively blocks external flame propagation, meeting petrochemical tank fire and explosion codes. 4. Personnel access function: The manhole cover provides a standard‑size opening (e.g., DN500, DN600) for personnel wearing respirators to enter the tank for maintenance. 5. Large flow capacity with low pressure drop: Optimized flow path ensures low breathing resistance for both venting and gas intake during rapid filling or discharging. 6. All‑weather protection structure: Rain and dust cover with internal drainage prevents water accumulation, suitable for harsh outdoor environments. 7. Corrosion‑resistant materials: Housing and internals available in aluminum alloy, carbon steel, or stainless steel; disc and flame arrestor core in stainless steel for various corrosive media. 8. Reliable sealing and easy maintenance: Flat or tapered hard seal provides zero leakage when closed; removable flame arrestor core for cleaning; simple disc assembly disassembly.

The ZGB-1 corrugated plate flame arrester for petroleum storage tanks is a flame arrestor safety device installed on tank breather lines, vent systems, or vapor recovery pipelines. It adopts stainless steel corrugated plate (corrugated tube) as the flame arresting element. The element quenches flames through the narrow gaps of the corrugated channels, effectively preventing external flame propagation into the storage tank. This flame arrester features high flame arresting efficiency, low pressure drop, and good corrosion resistance. Its core purpose is to be installed on breather valve inlets/outlets of fixed roof tanks and floating roof tanks, or nitrogen blanketing system pipelines in petroleum, chemical and other industries, preventing tank vapors from being ignited by lightning, static electricity, or external ignition sources, thereby ensuring the intrinsic safety of storage tanks during normal breathing and emergency relief, and meeting fire and explosion protection codes for petrochemical tank farms.Product Drawing of ZGB-1 corrugated flame arrester for oil storage tankFeatures:1. Corrugated plate flame arrestor element: Multiple layers of stainless steel corrugated strip and flat strip are alternately wound to form uniform triangular or rectangular narrow passages, providing a very short flame quenching distance for stable and reliable flame arresting performance. 2. Bidirectional flame arresting: Can block flame propagation from either the tank side or the atmosphere side, suitable for installation on both inlet and outlet of breather valves. 3. Large flow area, low pressure drop: High porosity (≥90%) of the corrugated channels minimizes gas flow resistance without affecting normal tank breathing capacity. 4. High temperature resistance: Stainless steel construction withstands short-term high-temperature flame impact without deformation or sintering. 5. Strong corrosion resistance: Flame arrestor element and housing available in 304, 316L stainless steel or carbon steel (with anti-corrosion coating), suitable for corrosive media such as petroleum and hydrocarbons, as well as outdoor environments. 6. Compact structure, easy installation: Flange connections match standard breather valve and piping interfaces; can be installed horizontally or vertically; easy to disassemble for maintenance. 7. Code compliant: Designed and manufactured according to GB 5908, ISO 16852 and other standards, certified by authorized testing agencies. 8. Easy maintenance: Flame arrestor element can be extracted from the housing for periodic cleaning of carbon deposits or impurities and then reinstalled, eliminating the need for complete replacement.

The ZGB-II drawer-type corrugated plate flame arrester is a flame arrestor safety device installed on tank breather lines, vent systems, or vapor recovery pipelines. It adopts a modular drawer-type structure, with the stainless steel corrugated plate element inserted into the housing. The element quenches flames through the narrow gaps between the corrugated plates, effectively preventing external flame propagation into the tank. The drawer design allows the entire element to be pulled out without disassembling the housing, facilitating on-site cleaning, replacement, or maintenance. Its core purpose is to provide reliable and easily maintainable flame arrestor protection for breather valves, nitrogen blanketing systems, and vent lines of storage tanks in petroleum, chemical, and storage/transportation industries, significantly reducing maintenance downtime and meeting fire and explosion codes for tank farms.Product Drawing of ZGB-II drawer-style corrugated flame arresterFeatures 1. Drawer-type pull-out structure: The flame arrestor element is inserted like a drawer into the housing and can be pulled out along guides without disconnecting pipeline flanges, making maintenance simple and fast. 2. Corrugated plate flame arresting element: Alternately wound stainless steel corrugated and flat strips form a uniform, dense matrix of narrow passages, providing efficient and reliable flame quenching. 3. Bidirectional flame arresting: Effectively blocks flame propagation from either the tank side or the atmosphere side, suitable for two-way protection on breather valve inlets/outlets and vent lines. 4. Large flow capacity, low resistance: High porosity of the corrugated channels ensures smooth gas flow with negligible additional pressure drop to normal tank breathing. 5. High temperature resistance and deformation resistance: All-stainless steel construction withstands instantaneous high-temperature flame impact without sintering or deformation, ensuring long service life. 6. Corrosion-resistant design: Housing and element available in 304, 316L stainless steel or carbon steel (with anti-corrosion lining) suitable for hydrocarbon, chemical media, and outdoor environments. 7. Flexible installation: Standard flange connections allow horizontal or vertical installation, directly matching breather valves and pipelines with strong adaptability. 8. Low maintenance cost: Periodic cleaning of carbon deposits or impurities by pulling out the element and reinserting it eliminates the need for complete valve replacement, minimizing maintenance workload.

The ZHQ-I gravel flame arrester is a flame arrestor safety device that uses gravel (quartz sand, ceramic balls, or metal balls) as the flame arresting medium. It is installed on tank breather piping, vent systems, or flammable gas pipelines. The interior is filled with a layer of gravel of a certain particle size, and the small gaps between the gravel particles form flame arresting channels. When flame passes through, heat is rapidly absorbed and dissipated, extinguishing the flame, thereby preventing external flame propagation into the tank or downstream equipment. This flame arrester features a simple structure, high corrosion resistance, and large flow capacity. Its core purpose is to provide reliable flame arrestor protection for breather valves and vent pipes in petrochemical storage tanks, oil depots, gas stations, etc., especially suitable for applications with particulate matter or easily polymerized media to prevent clogging of the gravel channels.Product Drawing of ZHQ-I gravel flame arresterFeatures: 1. Gravel flame arresting medium: Filled with gravel, quartz sand, ceramic balls, or metal balls; the gaps between gravel particles form flame arresting channels, providing high quenching efficiency with low medium cost and easy replacement. 2. Large flow area, low pressure drop: High overall porosity of the gravel layer minimizes gas flow resistance without affecting normal tank breathing capacity. 3. Strong anti-clogging ability: Insensitive to small amounts of particulates or polymers in the gas stream; gravel gaps are not easily completely blocked, suitable for dirty or fouling-prone applications. 4. High temperature impact resistance: Gravel packing withstands short-term high-temperature flame impact without sintering or deformation, ensuring stable flame arresting performance. 5. Good corrosion resistance: Housing available in carbon steel, stainless steel, or aluminum alloy; gravel is chemically stable, adapting to various corrosive environments. 6. Simple structure, easy maintenance: No complex disassembly required; end cover can be opened to remove, clean, or replace gravel packing, resulting in low maintenance cost. 7. Flexible installation: Standard flange connections allow horizontal or vertical installation, directly connecting to breather valves and piping. 8. Code compliant: Designed and manufactured according to relevant flame arrester standards (e.g., GB 5908), meeting fire protection requirements for petrochemical tank farms.

The air foam maker is a fixed foam fire extinguishing device installed on storage tanks or oil pools. It draws in air and thoroughly mixes the foam concentrate solution with air to produce a certain expansion ratio of air foam, which is then discharged onto the burning liquid surface to achieve extinguishment by coverage. Its core purpose is to provide low or medium expansion foam fire protection for flammable liquid storage tanks (such as crude oil, gasoline, alcohols, chemical solvents, etc.) . During a fire, it rapidly generates a large volume of foam to cut off oxygen, suppress vaporization, cool the surface, prevent fire spread, and effectively extinguish tank fires.Product Drawing of Air foam generatorFeatures: 1. Simple structure and convenient installation: It is composed of shell, foam nozzle, air intake and mixing chamber. It is connected by flange and can be directly installed on the top or side wall of the tank.2. High mixing efficiency: the foam mixture is fully mixed with air using the venturi principle, and the foam foaming ratio is stable (usually 3-8 times for low multiples and 20-40 times for medium multiples).3. Fast fire extinguishing and uniform coverage: the generated foam has good fluidity and can quickly spread the burning surface to form a continuous covering layer to isolate oxygen and inhibit re combustion.4. Corrosion resistant material: The shell and internal components are made of stainless steel (304/316) or copper alloy, which is resistant to corrosive media inside the storage tank and outdoor environments.5. Linkage with fire control system: it can be linked with foam proportioning device, fire pump and pipe network, and automatically or manually start liquid supply in case of fire.6. Suitable for various foam solutions: suitable for protein foam, fluoroprotein foam, aqueous film forming foam (AFFF) and other foam extinguishing agents.7. Easy maintenance: Regularly check if the air intake is blocked and clean the internal dirt to restore performance.8. Comply with the fire code: the design and manufacture shall comply with the standards such as General Technical Conditions for foam Fire Extinguishing Systems and Components (GB 20031).

The HX2 / HXF2 flame arrestor breather valve with dual nozzles is a two‑way breather valve installed on the roof of fixed roof storage tanks. It is equipped with two independent piping connections – one for directing excess gas to a recovery system during overpressure, and the other for admitting nitrogen or purified air during vacuum. The valve integrates a pressure disc and a vacuum disc that open automatically at set points, along with a built‑in stainless steel corrugated flame arrestor element to prevent external flame propagation into the tank. Its core purpose is to safely balance tank pressure during filling, emptying, or temperature changes while achieving centralized vent gas recovery and controlled intake gas supply, meeting the combined requirements of vapor recovery, nitrogen blanketing, and explosion‑proof fire protection.HX2 and HXF2 with dual-connection flame arrester breather valves product diagram 1. Two independent channels – The vent nozzle and intake nozzle are completely separate, avoiding crossflow interference and facilitating connection to recovery networks and gas supply lines respectively. 2. Precise setpressure control – The pressure disc and vacuum disc operate independently at their respective set values, with a tapered metaltometal hard seal ensuring zero leakage after closure. 3. Flame arrestor safety element – Multilayer stainless steel corrugated plate element effectively quenches flames from either direction, meeting petrochemical tank fire safety codes. 4. High capacity, low resistance – Flow path is hydraulically optimized to minimize breathing resistance, accommodating high flow rates during rapid loading/unloading. 5. Corrosionresistant material selection – Housing available in aluminum alloy, carbon steel, or stainless steel; all moving internals are stainless steel, suitable for oil, solvents, and various chemical media. 6. Allweather outdoor design – Top rain and dust cover with internal drainage structure prevents accumulation of water and debris. 7. Easy maintenance – The disc assembly can be extracted as a whole, and the flame arrestor element can be removed for cleaning without pipeline cutting or hot work.

The ZFQ explosion‑proof flame arrestor breather valve is a proactive safety device specifically designed for flammable and explosive liquid storage tanks, installed on the roof of fixed roof tanks. It integrates automatic pressure regulation and flame arrestor functions into a single unit: when tank pressure rises above set point or vacuum exceeds allowable limits, the corresponding disc opens promptly to connect the tank with atmosphere or a protective gas source, restoring pressure balance. A built‑in stainless steel corrugated flame arrestor element quenches any potential external flame via narrow‑gap effects, fundamentally preventing fire propagation into the tank. Its core value lies in providing continuous, reliable breathing protection for volatile media storage tanks in petroleum, chemical, terminals, oil depots and similar facilities, while simultaneously meeting environmental emission and explosion‑proof code requirements.Product Drawing of ZFQ Type Explosion-proof Flame-arresting Breathing ValveFeatures:1. Dual‑function integration – Combines breather valve and flame arrestor in one body, reducing roof penetrations, simplifying installation, and enhancing system reliability. 2. Independent dual‑disc system – Pressure disc and vacuum disc each have their own spring and sealing assembly, actuating precisely at set points without cross‑interference, eliminating misoperation risks. 3. Stable operation and tight sealing – Metal‑to‑metal hard seating ensures zero leakage when closed, with small differential between opening and reseating pressures for responsive action. 4. Superior environmental adaptability – Equipped with rain cover, dust screen, and drain holes to withstand rain, sandstorms, and intense sunlight, suitable for exposed tank farms. 5. Flexible corrosion‑resistant materials – Body options include aluminum alloy, carbon steel, or stainless steel; all internal wetted parts are stainless steel, compatible with oils, aromatics, alcohols, and acid/base media. 6. Low flow resistance – Rounded internal flow passages minimize pressure drop, maintaining stable tank pressure even under high‑rate breathing conditions. 7. Low maintenance – Flame arrestor element can be extracted without tools; disc assembly is quickly detachable for routine inspection and cleaning, requiring no special skills. 8. Full standard compliance – Designed and manufactured per SY/T 0511, ISO 16852, and GB 5908, with rigorous flame‑arresting performance testing prior to delivery.

The ZGB-III threaded flame arrester is a small-bore flame arrestor safety device with threaded connections, installed on flammable gas vent lines, instrument air piping, or small tank breather lines. It features an internal stainless steel corrugated plate flame arrestor element, utilizing the tiny gaps between the corrugated plates to quench flames, effectively preventing external flame propagation to upstream equipment or tanks. This flame arrester offers a compact structure and convenient installation. Its core purpose is to provide reliable flame arrestor protection for instrument vent systems, small storage tanks, gas pipeline branches, and laboratory gas lines, suitable for small-bore DN15 to DN50 pipelines requiring explosion-proof flame arresting.Product Drawing of ZGB-III threaded flame arresterFeatures:1. Threaded connections for easy installation: Standard female or male threads (such as NPT, G, M threads) allow direct screwing into pipeline or equipment ports without flange welding, ideal for small-bore piping. 2. Corrugated plate flame arrestor element: Alternately wound multi-layer stainless steel corrugated and flat strips form uniform narrow passages, providing high flame arresting efficiency with low pressure drop. 3. Bidirectional flame arresting: Capable of blocking flame propagation from either direction, suitable for small gas pipeline systems where combustion may initiate from either side. 4. Compact structure and light weight: Small size and light weight make it ideal for space-limited installations such as instrument cabinets, small tanks, or skid-mounted equipment. 5. Corrosion and high temperature resistance: Element and housing made of 304 or 316L stainless steel, resistant to corrosive gas environments and short-term high-temperature flame impact. 6. Easy maintenance: The flame arrestor element can be extracted from the housing for periodic cleaning of carbon deposits or impurities; threaded connections facilitate disassembly without special tools. 7. Code compliant: Designed and manufactured according to GB 5908, ISO 16852 and other standards, meeting fire and explosion protection requirements for small-bore flame arresters.