Y43H Steam Pressure Reducing Valve (Spirax Sarco Type) OverviewThe Y43H Steam Pressure Reducing Valve (Spirax Sarco Type) is a pilot-operated piston-type steam-specific pressure reducing valve based on Spirax Sarco’s classic design philosophy. It adopts a two-stage pressure reduction structure with pilot valve sensing control and main valve piston actuation, specifically designed to stably and precisely reduce high-pressure superheated or saturated steam from boilers or main pipelines to the safe operating pressure required by process equipment or heating systems. Its core function is to achieve reliable control and stable supply of steam pressure under harsh working conditions such as large pressure differences, high temperatures and load fluctuations, ensuring the safe and efficient operation of steam-using equipment. Typically featuring a cast steel or stainless steel valve body and flange connection, it is an indispensable key pressure regulating device in industrial steam systems such as petrochemical, power generation, textile and food processing industries.Y43H Steam Pressure Reducing Valve (Spirax Sarco Type) Product ImageY43H Steam Pressure Reducing Valve (Spirax Sarco Type) Features 1. Steam-Specific Design, Reliable Performance Structurally optimized for steam medium characteristics. Adopts high-temperature resistant materials and rigid sealing, with a balanced piston design for the main valve. Ensures smooth operation without jamming or whistling under high-temperature and large pressure difference conditions, delivering stable and reliable pressure reduction with a long service life. 2. Pilot-Operated Piston Structure, Precise Control Features an independent pilot valve to accurately sense downstream pressure and drive the main valve piston through control pipelines. The large force-bearing area of the piston provides strong opening/closing force and excellent adjustment linearity for the main valve disc. It offers strong compensation for inlet pressure fluctuations and flow changes, achieving high outlet pressure control precision and superior pressure stabilization.3. Wide Pressure Reduction Ratio, Strong Adaptability Boasts excellent pressure reduction capability with a typical ratio of 10:1 or higher. It can directly reduce high inlet steam pressure to low working pressure in one step, simplifying system design. The wide adjustment range allows easy setting of the required outlet pressure by adjusting the pilot valve spring.4. High-Temperature Resistance, Safe and Durable All pressure-bearing components and sealing materials are selected for high-temperature steam conditions, capable of withstanding saturated steam and a certain degree of superheated steam for long-term use. The robust structure is usually equipped with a built-in stainless steel filter screen to protect the pilot valve from pipeline impurities, ensuring operational safety and durability under harsh working conditions. 5. Easy Maintenance, High Integration The pilot valve and main valve adopt a modular design, facilitating quick disassembly for inspection, maintenance, or replacement of internal components (such as valve seats, seals, diaphragms/piston rings). Some high-end models integrate pressure gauge interfaces and independent safety valves, realizing integrated pressure monitoring and overpressure protection, which reduces installation space and costs.

ZZYP Self-Operated Pressure Reducing Valve Overview The ZZYP self-operated pressure reducing valve is an automatic pressure regulating device driven by the medium's own energy. Adopting the direct-acting pressure sensing and control principle, it can accurately regulate and stably output the pipeline system pressure without external power supply or air source. The valve senses downstream pressure changes through built-in pressure sensing elements (such as diaphragms and bellows) and drives the valve core to automatically adjust the opening degree, thereby stably reducing the high and unstable pressure at the inlet to the set outlet pressure value. Its design emphasizes energy efficiency and reliability, and it is widely used in pressure control occasions without external power or with high explosion-proof requirements, such as steam heating, compressed air, gas supply, and industrial fluids. The valve adopts a cast steel, stainless steel or copper alloy valve body with a compact and robust structure, supporting flange and thread connection methods. It is a key equipment for realizing pressure zoning control of process systems, pressure stabilization at equipment inlets, and safe and energy-saving operation.ZZYP Self-Operated Pressure Reducing Valve Product ImageZZYP Self-Operated Pressure Reducing Valve Features 1. Self-Operated Drive for Energy Saving and ReliabilityIt fully utilizes the pipeline medium's own pressure as the driving energy, realizing automatic pressure stabilization without relying on external power supply, air source or complex control systems. This design not only reduces energy consumption and operating costs but also avoids control failure caused by external power faults, ensuring high system reliability. 2. Direct-Acting Sensitive RegulationEquipped with a force balance system composed of high-sensitivity pressure sensing elements (diaphragm/bellows) and precision springs, it responds quickly and directly to downstream pressure changes. The regulating mechanism has no intermediate transmission links, featuring timely dynamic response and stable pressure control with an accuracy of ±5%~10% of the set value.3. Compact Structure and Strong AdaptabilityAdopting an integrated valve body design, it is small in size and flexible in installation, supporting horizontal or vertical mounting. It is widely applicable to various media such as steam, compressed air, nitrogen, liquefied gas and oil products, with a wide operating temperature range (-20℃~350℃) and pressure resistance grade up to PN16~PN40.4. Versatile Control with Flexible ConfigurationBy replacing the actuator type or adjusting the pressure guiding configuration, it can achieve multiple functions including downstream pressure regulation (pressure reducing and stabilizing), upstream pressure regulation (pressure relief and holding) and differential pressure control, meeting different pressure control needs of process systems.5. Easy Maintenance and Long-Term StabilityThe control mechanism adopts a modular design, and main wearing parts (such as diaphragms and sealing rings) can be quickly replaced without disassembling the valve body during maintenance. The overall structure is robust, and key components are treated for corrosion and wear resistance, making it suitable for continuous operation with long service life and low maintenance costs.

ZZVP Self-Operated Micro-Pressure Regulating Valve Overview The ZZVP self-operated micro-pressure regulating valve is a precision micro-pressure control device driven by the medium's own energy. Adopting the direct-acting pressure sensing principle, it can automatically regulate and stably control the micro-pressure of the pipeline system (usually in the range of 0.5kPa to 50kPa) without external power supply or air source. The valve senses pressure changes through a sensitive diaphragm or bellows and directly drives the valve core to change the opening degree, which can accurately maintain the set pressure value. It is especially suitable for occasions with strict requirements for low-pressure or micro-pressure stability, such as ventilation systems, gas piping, biological fermentation tanks, and laboratory negative pressure control. The valve features a cast steel, stainless steel or copper alloy valve body with a compact structure, supporting flange or thread connections. It is an ideal solution for the micro-pressure control field that pursues energy saving and reliability without additional power.ZZVP Self-Operated Micro-Pressure Regulating Valve Product ImageZZVP Self-Operated Micro-Pressure Regulating Valve OverviewThe ZZVP self-operated micro-pressure regulating valve is a precision micro-pressure control device driven by the medium's own energy. Adopting the direct-acting pressure sensing principle, it can automatically regulate and stably control the micro-pressure of the pipeline system (usually in the range of 0.5kPa to 50kPa) without external power supply or air source. The valve senses pressure changes through a sensitive diaphragm or bellows and directly drives the valve core to change the opening degree, which can accurately maintain the set pressure value. It is especially suitable for occasions with strict requirements for low-pressure or micro-pressure stability, such as ventilation systems, gas piping, biological fermentation tanks, and laboratory negative pressure control. The valve features a cast steel, stainless steel or copper alloy valve body with a compact structure, supporting flange or thread connections. It is an ideal solution for the micro-pressure control field that pursues energy saving and reliability without additional power.

Y43H Pilot-Operated Steam Pressure Reducing Valve Overview The Y43H pilot-operated steam pressure reducing valve assembly is a specialized pressure regulating unit designed for steam systems, comprising a pilot-operated pressure reducing valve, upstream and downstream isolation valves, a filter, pressure gauges, and associated piping accessories. This valve assembly utilizes a pilot-piston or pilot-diaphragm structure, where changes in downstream pressure are sensed by the pilot valve to drive the main valve for precise adjustment, achieving stable reduction of inlet steam pressure. The valve body is constructed from high-temperature-resistant cast steel or stainless steel, specifically designed for saturated and superheated steam conditions. This integrated valve assembly features high regulation accuracy and excellent stability, making it widely applicable in industrial steam systems such as power plants, petrochemicals, textiles, and food processing, providing reliable pressure control and system protection for steam-consuming equipment.Y43H Pilot-Operated Steam Pressure Reducing Valve Product ImageY43H Pilot-Operated Steam Pressure Reducing Valve Features 1. High-precision pilot-operated regulation: Utilizes a pilot control principle that responds sensitively to downstream pressure changes, offering high adjustment accuracy and superior pressure stabilization compared to direct-acting pressure reducing valves.2. Specialized design for steam conditions: The valve assembly structure and materials are optimized for high-temperature steam, providing resistance to erosion and thermal deformation, suitable for saturated steam and systems with a certain degree of superheat.3. Integrated safety configuration: Standard equipment includes an inlet filter, upstream and downstream isolation valves, dual pressure gauges, and a safety valve interface, offering comprehensive pressure monitoring, impurity filtration, and system protection.4. Easy maintenance and stable operation: The pilot valve and main valve can be inspected and repaired separately. The filter screen can be easily cleaned and seals conveniently replaced. The valve assembly operates smoothly with strong anti-interference capability.5. Wide range of applications: Can be adapted to steam pipelines with different pressure ratings. By replacing the pilot valve spring or adjusting the pilot valve setting, various pressure reduction ratios and flow requirements can be met.

EDRV-D Electric Steam Pressure Reducing Valve OverviewThe EDRV-D Electric Steam Pressure Reducing Valve is a high-precision steam pressure regulating valve controlled by an electric actuator, specifically designed for industrial steam systems. This valve utilizes a built-in pressure sensor to monitor downstream pressure in real time, with the electric actuator driving the main disc to precisely adjust the opening, thereby automatically reducing and stabilizing fluctuating inlet steam pressure at the set value. The valve body is typically constructed from cast steel or stainless steel, with internal components optimized for high-temperature steam characteristics. It achieves automated closed-loop control of steam pressure and is suitable for industrial applications such as food processing, chemical production, pharmaceuticals, textiles, and district heating systems, providing stable and reliable pressure control for steam-consuming equipment.EDRV-D Electric Steam Pressure Reducing Valve Product ImageEDRV-D Electric Steam Pressure Reducing Valve Features 1. High-precision Electric Control: Utilizes a closed-loop control system combining an electric actuator and a pressure sensor, providing precise and responsive pressure regulation with significantly higher control accuracy than traditional self-operated pressure reducing valves. 2. Automatic Pressure Stabilization and Wide-Range Adjustment: Automatically adapts to inlet pressure fluctuations and load changes, maintaining highly stable outlet pressure. Its wide adjustable ratio meets various steam pressure requirements. 3. High-Temperature and High-Pressure Resistant Structure: Specifically designed for steam applications, employing high-temperature-resistant sealing materials and a robust valve body to reliably withstand the high-temperature and high-pressure conditions of saturated or superheated steam. 4. Smart Integration and Remote Monitoring: Supports standard signal inputs (e.g., 4–20 mA) and integrates seamlessly with DCS and PLC systems for remote setting, real-time monitoring, and fault diagnosis. 5. Safety, Reliability, and Ease of Maintenance: Equipped with a manual operation mechanism for emergency use. The modular design ensures easy inspection and replacement of key components such as the valve seat and seals, simplifying maintenance.

VV231Y Direct-Acting Self-Operated Steam Pressure Reducing Valve Overview The VV231Y Direct-Acting Self-Operated Steam Pressure Reducing Valve is an automatically controlled valve designed specifically for steam systems. It operates without the need for external power, relying instead on the energy of the medium itself to achieve pressure regulation. The valve employs a direct-acting structure where changes in downstream pressure are directly sensed to drive the valve core, adjusting the opening to reduce and stabilize fluctuating inlet steam pressure at a set value. Typically constructed from cast steel or stainless steel, it features a simple and reliable design suitable for saturated or slightly superheated steam conditions. As it requires no electrical or pneumatic power supply, installation is straightforward. This valve is widely used in steam pipelines across industries such as food processing, textiles, chemicals, and heating, providing a cost-effective and reliable solution for stabilizing pressure for steam-utilizing equipment.VV231Y Direct-Acting Self-Operated Steam Pressure Reducing Valve Product Image VV231Y Direct-Acting Self-Operated Steam Pressure Reducing Valve Features1. Self-Operated, No External Power Required: Utilizes the medium's own pressure for regulation, eliminating the need for external power sources such as electricity or compressed air, making it energy-efficient and suitable for locations without external energy supply.2. Simple and Reliable Structure: Employs a direct-acting mechanical design with fewer components, resulting in low failure rates, stable and reliable operation, and minimal maintenance requirements.3. Cost-Effective and Easy Installation: Requires no supporting control system, enabling simple and quick installation. Offers low acquisition and maintenance costs with high cost-effectiveness.4. Clearly Defined Application Scope: Suitable for steam systems with relatively stable flow and moderate regulation accuracy requirements. Its operating temperature and pressure ranges meet general industrial steam needs.5. Easy Maintenance: The adjustment mechanism allows for in-line setting of pressure. Key sealing components are easy to replace, minimizing routine maintenance efforts.

Y945H Electric Steam Pressure Reducing Valve Overview The Y945H electric steam pressure reducing valve assembly is a high-precision steam pressure regulation device consisting of an electric pressure reducing valve, upstream and downstream shut-off valves, a filter, pressure gauges, and piping accessories. This valve assembly utilizes an electric actuator for operation, precisely controlling the main valve opening by receiving control system signals or through internal PID regulation, achieving automatic pressure reduction and stabilization of steam. The valve body is constructed from high-temperature-resistant cast steel or stainless steel, specifically designed for high-temperature and high-pressure steam conditions. This valve assembly features a high degree of automation and excellent regulation accuracy, making it widely applicable in steam systems across industries such as power plants, petrochemicals, pharmaceuticals, and food processing. It enables intelligent control and safety protection for process steam pressure.Y945H Electric Steam Pressure Reducing Valve Product ImageY945H Electric Steam Pressure Reducing Valve Features 1. High-Precision Electric Control: Utilizes an integrated electric actuator combined with a pressure sensor to achieve closed-loop control. It offers high regulation accuracy, fast response speed, and superior pressure stabilization compared to traditional self-operated valves.2. Specialized Design for Steam Conditions: The valve structure and materials are optimized for high-temperature and high-pressure steam, providing excellent resistance to erosion and thermal deformation. Suitable for saturated steam and superheated steam systems.3. Intelligent Integration and Remote Control: Supports standard signals such as 4–20 mA and Profibus, enabling seamless integration with DCS/PLC systems for remote setting, automatic adjustment, and fault diagnosis.4. Comprehensive Safety Configuration: The valve assembly is equipped as standard with an inlet filter, dual pressure gauges, safety valve interface, and condensate drainage devices, providing comprehensive system monitoring and safety protection.5. Easy Maintenance and Reliable Operation: The modular design allows independent maintenance of filter cleaning, valve inspection, and electrical servicing. The actuator is equipped with a manual operation function to ensure continuous system operation.

ZYS Self-Operated Pressure Reducing Valve Assembly Overview The ZYS Self-Operated Pressure Reducing Valve Assembly is an integrated pressure regulation unit composed of a main pressure reducing valve, upstream and downstream shut-off valves, a filter, pressure gauges, and pipeline accessories. This valve assembly operates on a self-actuated principle, requiring no external power source. It utilizes the medium's own pressure changes to drive the main valve for automatic adjustment, achieving stable reduction of inlet pressure. The valve body is constructed from cast steel or stainless steel and is equipped with precision filtration and dual pressure monitoring. It is suitable for steam, gas, and liquid media. This integrated design simplifies on-site installation and enhances system reliability, making it widely used in pipelines requiring stable pressure reduction and system protection, such as in petrochemical plants, heating systems, industrial boilers, and power plants.ZYS Self-Operated Pressure Reducing Valve Assembly Product ImageZYS Self-Operated Pressure Reducing Valve Assembly Features1. Integrated design for easy installation: Combines functions such as pressure reduction control, filtration monitoring, and shut-off protection into a single unit, reducing on-site pipeline welding and assembly efforts and improving installation efficiency.2. Self-operated regulation with stable and reliable performance: The main pressure reducing valve employs a direct-acting or pilot-operated self-actuated structure, offering sensitive response and enabling precise automatic pressure adjustment without external power.3. Comprehensive multiple protection functions: Equipped with an inlet filter to prevent clogging by impurities, upstream and downstream shut-off valves for convenient maintenance isolation, and dual pressure gauges for real-time monitoring of inlet and outlet pressures, ensuring safe system operation.4. Easy maintenance and optimized costs: The modular structural design allows independent operations such as filter cleaning, valve inspection, and instrument replacement, reducing maintenance difficulty and downtime.5. Wide range of applications: Can be custom-configured for steam, compressed air, nitrogen, liquefied gas, and various liquid media, meeting pressure reduction and stabilization requirements across different industrial scenarios.

The ZTP pneumatic desuperheating and pressure reducing valve is a high-performance industrial control device that integrates steam pressure regulation and temperature control into a single unit. Specifically designed for waste heat recovery in thermal power plants, boiler steam systems, and various thermal engineering projects, it achieves both pressure reduction and water-spray cooling within a single valve body. The core principle involves a pneumatic actuator driving a multi-stage throttling plug for pressure reduction, combined with a built-in precision atomizing nozzle system that injects desuperheating water uniformly into the high-speed steam flow for rapid heat exchange. The ZTP significantly simplifies pipeline layouts, reduces footprint, and minimizes heat loss. With its exceptional stability under high-temperature and high-pressure-drop conditions, this valve is a core execution element for ensuring the efficient operation of modern thermal networks.Product Image of ZTP Pneumatic Desuperheating and Pressure Reducing Valve Feature1.Dual-function integrated structure:Completes pressure reduction and desuperheating processes simultaneously within one valve body, effectively replacing the traditional combination of a pressure reducing valve and a separate desuperheater, greatly simplifying the process and reducing costs.2.Multi-stage throttling technology:Internals utilize a multi-stage cage or cascaded structure to release high-pressure steam step-by-step, effectively suppressing flashing and cavitation while significantly reducing noise and vibration caused by high-velocity fluids.3.Efficient and precise atomization:Features integrated high-performance stainless steel nozzles where water injection is dynamically compensated against steam flow. Precision spray angles ensure complete vaporization within a short distance, offering high temperature control accuracy without the risk of water droplet erosion.4.Powerful pneumatic drive:Equipped with high-thrust multi-spring diaphragm or piston actuators for stable torque output. Paired with intelligent positioners, it achieves millisecond-level response and precise proportional regulation of process parameters.5.High-temperature and pressure-resistant materials:Bodies are available in WCB, WC6, WC9, or stainless steel. Sealing surfaces are hard-faced with Stellite to ensure excellent erosion resistance under 560℃ and high-pressure fluctuations.6.Intrinsic safety and fail-safe protection:Powered by clean compressed air, it provides natural explosion protection. Fail-safe modes (full open or full close) can be configured to ensure the thermal system remains in a safe state during air supply failure.7.Precision guiding and stability:Utilizes an enhanced cage-guided structure with a large and precise guiding area. This ensures exact axial alignment of the plug throughout its stroke, resisting mechanical stress caused by fluid expansion.8.Modular maintenance:The compact scientific design features modular internals. Inspection and replacement of the plug, nozzles, and seals can be completed from the top without removing the valve body from the pipeline, shortening downtime.