Pressure Vacuum Relief Valve Breathing Valve

• Size: DN50 - DN300
• Class: 150lb to 2500lb
• Certificates: API 6D, CE, ISO9001
• Application Fields: Metallurgy,Light Industrial,Electric Power,Petroch
• Delivery Detail: 20~45 Days According to The Specific Quantities
• Transport Package: Standard Export Wooden Case
• Model NO.: HXF-IZ
• Specification: API6D, ISO9001, CE, SGS, etc
• Trademark: NIPO
• Origin: Wenzhou, Zhejiang, China
• HS Code: 8481804090
• Production Capacity: 2000PCS/Year

Product Description

Pressure Vacuum Relief Valve Breathing 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.
 

Main technology parameter:
Apply to every kinds of petroleum,chemical,medical,energy resources,special fluid or gas etc medium.
Explosion-proof class:BS5501:IIA,IIB,IIC.
Body material:carbon steel,aluminum alloy,stainless steel:SUS304,SUS304L,SUS316,SUS316L.
Disc,seat material:aluminum alloy,stainless steel.
Sealing material:PTFE.
Connection type:flange and thread.
Flange standard:HG20592 If customer need standard GB,SH,HGJ,JB,ANSI,JIS etc or change pressure class,please remark on the order contract.
Manufacture ,inspection standard:according to (petroleum storage tank breathing valve) SY/T0511.1-2010,(petroleum storage tank flame retar- dant performance and test method). GB5908-86 standard implement manufature and inspection or customer required standard.

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)

Note: 
under normal circumstances, (fire) breathing valve operating pressure to ClasssA or Class B shall prevail;

Applicable materials: 
gasoline, kerosene, diesel, aromatics, sulfur, air and other petrochemical materials;
 
Environment temperature:
-40 ºC -+60 ºC;

Maintenance and servicing:
In order to make flame retardant breathing valve use safety,should dismount bellows flame retardant layer 3-6 months regulary,cleaning,make sure that every hole in flame retardant layer are unobstructed,avoid block,make sure it use safety and normal.Regularly check the positive,negative valve plate  movement flexible,check leading mark and disc seating facing damage or not,should change immediately if damage.When check maintenance and installation again,should insure each junction surface of the valve fit closely,disc rising flexbility.When new valve start operating,before the installation,should remove the flange protection cap clean the quakeproof matters between disc,otherwise the breathing valve will malfunction.

 

PRODUCTS

CASTING

INSPECTION
PACKING


FAQ:

Q:Why choose us ?
A: we are a manufacturer, we have been manufacturing 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.


We welcome all the world customers to contact us for more cooperation.

With our years of technical knowledge and experience,we assure you,

Naibang will be one of your best parters in China.

Any interest,please do not hesitate to contact us.