Conservation Vent Valve (PVRV)
Resistant
Sealing
Operation
Long Life
Alis Valves offers high-performance Conservation Vent Valves (PVRV) designed to protect storage tanks by maintaining optimal internal pressure. These valves minimize vapor loss, reduce emissions, and prevent tank damage caused by excessive pressure or vacuum conditions. Also known as Pressure Vacuum Relief Valves (PVRV), these valves allow controlled release of vapors during overpressure and permit air intake during vacuum conditions, ensuring safe and efficient tank operation.
Specifications
Size Range
DN 25 to DN 300
Body Material
Carbon Steel / Stainless Steel / Aluminum
Mounting
End of Line (Tank Roof Mounting)
Media
Vapors, Gases, Air
Standards
API 2000 / ISO (as required)
Set Pressure
Low Pressure / Vacuum Settings
Seat Material
PTFE / Soft Seated
Temperature Range
-20°C to +200°C (Depends on Material)
Leakage
Tight Shut-Off
Product Images
Frequently Ask Questions
A Conservation Vent Valve (PVRV) is a tank protection device that controls pressure and vacuum inside a storage tank. It releases excess vapor when internal pressure becomes too high and allows air or gas to enter when the tank develops a vacuum.
A PVRV helps protect storage tanks from overpressure and vacuum conditions that could otherwise damage the tank. It can also help reduce unnecessary vapor loss during normal tank breathing.
Tank breathing refers to the movement of vapor and air into and out of a storage tank caused by changes in liquid level, temperature and atmospheric conditions.
A PVRV helps control this breathing process.
Alis Valves is a Conservation Vent Valve (PVRV) manufacturer and supplier in India, offering pressure-vacuum protection solutions for storage tanks used in oil & gas, refinery, petrochemical, chemical and industrial applications.
PVRV stands for Pressure Vacuum Relief Valve. It combines pressure-relief and vacuum-relief functions in one valve.
When tank pressure rises above the preset pressure, the pressure-relief section opens and releases vapor.
When tank pressure falls below the preset vacuum setting, the vacuum section opens and allows air or suitable gas to enter the tank.
A properly selected and maintained PVRV can help protect against excessive vacuum conditions, which can contribute to tank deformation or collapse. Correct sizing and set-pressure selection are essential.
