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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 arrester
Features:
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.

Structure Diagram of ZHQ-I gravel flame arrester
Component name and material
| 构件Component | 壳体Body | 阻火芯件Fire Retardant Core 螺栓/螺母 | 螺栓/螺母Bolt/Nut |
| 材质Material | 不锈钢 铝合金 碳钢不锈钢Stainless Steel 铝合金Aluminum Alloy 碳钢Carbon Steel | 304316316L | 304316316L |
Performance Specification Table
| 产品型号Model | ZHQ-I 砾石阻火器ZHQ-I Gravel Flame Arrestor |
| 公称通径Nominal Diameter | DN20 ~ DN300 |
| 公称压力Nominal Pressure | 1.6MPa |
| 适用介质Applicable Medium | 汽油、柴油、煤油、原油、芳烃、可燃化工油气Gasoline,diesel,kerosene,crude oil,aromatics,combustible chemical gas |
| 工作温度Working Temperature | -30℃ ~ +180℃ |
| 壳体材质Body Material | WCB 碳钢、304/316 不锈钢WCB carbon steel,304/316 stainless steel |
| 阻火填料Flame Filler | 1~6mm 高纯石英砾石High-purity quartz gravel 1~6mm |
| 阻火等级Explosion Grade | ⅡB 级Grade ⅡB |
| 阻爆性能Explosion Resistance | 连续 13 次阻爆试验合格Pass 13 consecutive explosion stop tests |
| 耐烧性能Burning Resistance | 持续灼烧 1h 无回火No backfire after 1-hour burning test |
| 执行标准Execution Standard | GB13347-2010 |

ZHQ-I gravel flame arrester of Outline Drawing
Outline dimension table
| 规格DNmodel | 尺寸(mm)size | ||
| D | K | H | |
| 20 | 105 | 105 | 309 |
| 25 | 115 | 115 | 309 |
| 32 | 135 | 135 | 347 |
| 40 | 145 | 145 | 357 |
| 50 | 160 | 160 | 351 |
| 65 | 180 | 180 | 435 |
| 80 | 195 | 195 | 441 |
| 100 | 215 | 215 | 437 |
| 150 | 280 | 280 | 490 |
| 备注:此数据仅供参考,以实物为准,如有更改,恕不另行通知Note: This data is for reference only and subject to actual conditions. No notice will be given for any changes. | |||

Model:
GHF-1-6C/GHF-1-10C/GHF-1-16CSpecification:
DN80 ~ DN250Pressure:
0.6Mpa-1.6MpaMaterial:
carbon steel
Model:
QHXF-89/QHXF-89C/QHXF-89PSpecification:
DN50-DN250Pressure:
353Mpa-980MpaMaterial:
cast iron, aluminum alloy, stainless steel
Model:
HX8-16/HX8-25/HX8-16P/HX8-25P/HXF8-16/HXF8-25/HXF8-16P/HXF8-25PSpecification:
DN50-DN250Pressure:
1.6MPa~2.5MPaMaterial:
cast iron, aluminum alloy, stainless steel