Our products are of compact structure, big ventilation, small leakage and good sealing. Recently, we developed Explosion-proof and Fire Resistance Breathing Valves (HXF-QZ) with international advanced level. Fire resistance component is set at the inlet, which completely eradicated the chance that fire get into the breathing valve. Small in size, light in weight, easy to check, easy to clean and easy to replace are all advantages of the device.
Main Technical Parameters：
■Applicable to all kinds of Petroleum, chemical industry, medicine, energy, and special liquid or gas.
D：Special pressure standard（subject to users’ specification）
■Explosion-proof Level: BS5501：ⅡA、ⅡB、ⅡC。
■Material of the Housing：Carbon steel, aluminum alloy, stainless steel: SUS304、SUS304L、SUS316、SUS316L。
■Material of valve disk and valve seat: Aluminum alloy, stainless steel.
■Material of Sealing Element: Teflon.
■Standard of Flange：HG20592-97. Please note in order contract if GB、SH、HGJ、JB、ANSI、JIS and other standards are required or there is a need for Pressure change.
■Standards for Manufacture and test: SY/T0511-1996 for Oil Tank Breathing Valve and SY/T0512-1996 for Flame Arrester for Petroleum Tank
1） All Weather Breathing Valve（HXF-Q）, Explosion-proof and Fire Resistance Breathing Valves (HXF-QZ)
2) Breathing Valve with Inlet (outlet) Pipe（HXF-J）
Fire-resistance Breathing Valve with Inlet (outlet) Pipe（HXF-JZ）
3）、Single Breathing Valve（HXF-D） Explosion-proof and Fire-resistance Single Breathing Valve（HXF-DZ）
4）、Hydraulic Safety Valve（HXF-Y）
Hydraulic Safety Valve is to be installed on the top of oil tank and perform the same function with breathing valve. It works when breathing valve is out of order.
Standard for Manufacture and Test: SY/T0525.1-93。
5）、Breathing Inlet（HXF-R）, Explosion-resistance and Fire-Proof Breathing Inlet（HXF-RZ）
Breathing Inlet and Fire-resistance Breathing Inletare emergent air breather equipped on top of storage tank.They work to support the use of Flame Arrester Breathing Valve to avoid accidental Sharp overpressure or vacuum from breaking storage tank and causing accident. And they also play the function of flame arresting. As safety devices for storage tank, they are particularly applicable to vault atmospheric tank containing medium top with nitrogen. They possess the following advantages: discharging with constant pressure, in-drawing with constant pressure, flexible open and close, safe fire-resistance, compact structure, good sealing, reliable etc..