Explosion-Proof Pressure Vacuum Vent Breather Valve

Explosion-Proof Pressure Vacuum Vent Breather Valve

Model QZF-89 is designed to vent to atmospheric to protect your tank from damage created by over-pressure or excessive vacuum.The flame arrestor performs as an extinguishing barrier,which absorbs and dispels heat,reduces fire temperature and the oxyen level to stop the fire through layers of metal ribbons shaped with crimped corrugations.

Operating pressure:
Type A: +355pa(+36mmH2O) -295pa(-30mmH2O)
Type B: +980pa(+100mmH2O) -295pa(-30mmH2O)
Type C: +1970pa(+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)