Breather Valve

- Reliable operations reduces vapor losse

- Suitable and compact design ensures long-term maintenance free life cycle

- Full lifting and high flow capacity

- Meet API leak test requirement

- No need inside maintenance

- Available outside inspection, cleaning andmaintenance without disassembling



The model BV/BS pressure vacuum relief valves designed manufactured and tested according to the API 2000 standard.
The model BV/BS pressure vacuum relief valves used to relieve excess pressure and vacuum that has developed in a tank.
To avoid product loss, BV/BS pressure vacuum relief valves are recommended for use on atmospheric storage tank.
The set pressure and relieving pressure shall be consistent with the requirements of the standard according to which the thank was designed and fabricated. The model BV/BS can be manufactured the range of pressure and vacuum setting form ±22 mm W.C to ±8000 mm W.C.
The model BV type is weight-loaded type with minimum setting ±22 mm W.C and maximum setting ±700 mm W.C.
The model BS type is spring-loaded type over weight loaded type.
The materials for BV/BS shall be selected for the stored-product service temperatures and pressures. Also, the materials should be compatible with the product stored in the tank and with any products formed in the vicinity of the relief valve during filling and discharge. Usually the materials are available in Aluminum, Carbon Steel, Stainless Steel grade 304, 316 and 316L to suit individual requirements.
 

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TYPE BB/BS-2 BB/BS-3 BB/BS-4 BB/BS-5 BB/BS-6 BB/BS-8 BB/BS-10 BB/BS-12 SIZE 50A 80A 100A 125A 150A 200A 250A 300A N.D 50 80 100 125 150 200 250 250 A 173 183 430 463 580 700 840 950 H 303 335 340 400 480 580 710 800 W.T(kg) 16 20 27 36 46 85 125 150

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NO DESCRIPTION SPEC.1 SPEC.2 SPEC.3 1 BODY Carbon Steel Stainless Steel 304 Stainless Steel 316/316L 2 PRESSURE SEAT Stainless Steel 304 Stainless Steel 304 Stainless Steel 316/316L 3 HOOD Stainless Steel 304 Stainless Steel 304 Stainless Steel 304 4 BURD/BUG SCREEN Stainless Steel 304 Stainless Steel 304 Stainless Steel 304 5 PRESSURE/VACUUM DISC Stainless Steel 304 Stainless Steel 304 Stainless Steel 316/316L 6 PRESSURE/VACUUM DIAPHRAGM TEFLON TEFLON TEFLON 7 BOLT/NUT Stainless Steel 304 Stainless Steel 304 Stainless Steel 316 8 VACUUM COVER Carbon Steel Stainless Steel 304 Stainless Steel 316/316L 9 PRESSURE/VACUUM STEM Stainless Steel 304 Stainless Steel 304 Stainless Steel 316/316L 10 VACUUM SEAT Stainless Steel 304 Stainless Steel 304 Stainless Steel 316/316L

* Other material is available on special request by customers