BV-100 & BV-101 series valves are highly developed pressure and vacuum relief valves with excellent flow performance. These valves are useful as relief valves for blanketed vessels in which solvents are filled & drawn at a high flow rate. This valve is installed in the in-and out breathing lines of tanks, vessels and process equipments to protect against unpredicted fluctuations in pressure & vacuum. By retaining toxic vapors and avoiding atmospheric contamination, these valves provide increased fire protection and safety.Pressure cum vacuum relief breather valves are designed to protect tanks from possible casualty due to over pressure created by thermal expansion and product movement into the tank and excessive vacuum created by thermal contraction and product movement out of the tank. At the same time it minimizes costly product evaporation / loss. Continued design improvements of these valves provide high efficiency, maximum flow capacity and minimum leakage.The product vapors can be discharged through a collective line connected to the line flange on the pressure side (Model: BV101). If the vapors are flammable, connect a detonation flame arrester.
 
Key Features
 
"Full Lift Type" technology valve utilizes only 10% overpressure to reach full lift.
Very high flow capacity.
Extreme tightness and hence least possible product losses and reduced environmental pollution.
The valve body is self draining to keep condensates away from the seating surfaces.
Can be used in areas subject to explosion hazards.
The valve pallet is guided within the body to protect against harsh weather conditions.
Easy Installation.
The easily serviceable configuration and lightweight construction reduces maintenance and installation costs.
Specially designed elastometric seating contributes to high resistance to cohesion of ice and gum formations, thus ensuring protection against pallet sticking to the seating surface.
 
Specifications
 
Body Size & Ratings :
2", 3", 4" (Higher sizes on request).
ANSI B16.5 Class 150
Relief Set Pressure 200mmWCg to 600mmWCg
Set Vacuum -20 to -600mmWCg
Disc Nitrile (Standard), Neoprene, EPDM, Viton, PTFE, FEP
'O' Rings Nitrile (Standard), Neoprene, EPDM, Viton, PTFE, FEP
Temperature Capabilities -45°C to 200°C with different elastometric parts.
 
MOC
 
Body
ASTM-A-216 Gr. WCB (Standard), A351 Gr. CF8, A351 Gr. CF8M, A351 Gr. CF3, A351 Gr. CF3M
NACE & other special materials available on request
Internal Trim Parts
A479 Gr. SS316 (Std)
NACE & other special materials available on request
Seats
Nitrile (standard), Neoprene, EPDM, Viton, PTFE, FEP.