Pressure Regulating Breather Valve Relife 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 vacuum making the storage tank destruct, prevent the outside flame enter, reduce the tank fluid volatile.


The valve adopts polytetrafluoroethylene material, has the advantages of low temperature resistant, anti frost. 

The electrostaticprotection device is provided with a respiratory valve, the valve and the tank to keep the same potential moment.
 

Operating pressure:

Type A: +355pa(+36mmH2O) -295pa(-30mmH2O)

Type A: +355pa (+36mmH2O) -295pa (-30mmH2O)

Type B: +980pa(+100mmH2O) -295pa(-30mmH2O)

Type B: +980pa (+100mmH2O) -295pa (-30mmH2O)

Type C: +1950pa(+200mmH2O) -295pa(-30mmH2O)

Type C: +1950pa (+200mmH2O) -295pa (-30mmH2O)

Type D:  according to user requirement (special pressure rating)
 

Note: 
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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