NOMINAL SIZE

- 1", 1-1/2", 2", 3", 4", 6", 8", 10", and 12"

CONNECTIONS

- ANSI/ASME B16.5 Class 150 Flange
- KS/JIS 10K Flange

Vacuum Relief Valve
Designed protect storage tank from excessive negative over-pressure

Drilling conforming to ANSI/ASME B 16.5 for Class 150 Flanges.
or KS/JIS 10K Flanges
Normally, when the pressure in the storage tank is lower than the Set
Vacuum while maintaining the normally closed condition, the pallet
opens and the external air is flowed to relieve the vacuum.
NBR(Buna-N), VITON and other seating materials are available
when required
Suitable materials available for corrosive and extreme temperature service
FEP TEFLON seat diaphragms are standard to increase reliability and
extended service life, and make minimize sticking caused by resinous
vapors and atmospheric moisture.
▶ Consult our factory for special application.