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QHXF-2000 All- Weather Pressure Vacuum Relief Valve

QHXF-2000 All- Weather Pressure Vacuum Relief Valve

Breathing valve is a kind of air breather which install on the petrochemical fixed storage tank, in order to avoid tank over the pressure or over vacuum making the storage tank destruct, prevent the outside flame enter ,reduce the tank fluid volatile.
Product Details

QHXF-2000 All- Weather Pressure Vacuum Relief Valve

Model QHXF-2000 is designed to vent to atmosphere to protect your tank from damage created by over-pressure or excessive vacuum.Costly product evaporation losses due to normal tank "breathing" are greatly reduced.Because it retains toxic vapous,atmospheric contamination is minimized.This helps to provide increased fire protection and safety.

Product features

Size 50mm-300mm

Pressure settings 355pa to1950pa

Vacuum settings -295pa

All weather coating

Operating pressure:
Type A: +355pa(+36mmH2O) -295pa(-30mmH2O)
Type B: +980pa(+100mmH2O) -295pa(-30mmH2O)
Type C: +1950pa(+200mmH2O) -295pa(-30mmH2O)
Type D:  according to user requirement (special pressure rating)

under normal circumstances, (fire) breathing valve operating pressure to B shall prevail;
Applicable materials: 
gasoline, kerosene, diesel, aromatics, sulfur, air and other petrochemical materials;
Environment temperature:
-40 ºC -+60 ºC;
Shell material: 
HT, AL, A3, 18-8, 304, 304L, 316, 316L.
Flange standards: 
HG20592-97 PN1.0 (also can be produced according to user specified criteria) 




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Q:Why choose us ?
A: we are a manufacturer, we have been manufacturing check valve more than 20 years.

Q. what is your payment term? 
 A: T/T 30% down payment, balance to be paid before shipment. or L/C.
Q:Can we print our logo on your products?
A: yes, we offer OEM/ODM service, we support the customized logo, size, package,etc.
Q: what is your main market?
A: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Q: Can I get samples from your factory?
A: Yes, Samples can be provided.
Q: If products have some quality problem, how would you deal with?
A: We will responsible for all the quality problems.

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