Model: OPW Vent-Line PV Valve | Application: Petroleum Storage Tank Venting

Description:
The OPW Pressure Vacuum (PV) Valve is a safety-critical component designed for use on vent pipes of underground and aboveground petroleum storage tanks. It controls the internal pressure and vacuum levels within the tank by allowing air to enter or escape when preset pressure or vacuum thresholds are reached, helping to prevent evaporation loss, over-pressurization, and vacuum damage.

Made from high-grade, fuel-compatible materials, this valve is factory-calibrated to open at specific pressure/vacuum settings, ensuring the tank remains within safe operating limits. It also acts as a flame arrestor to prevent flame propagation into the tank through the vent line, offering additional protection in hazardous environments.

Key Features:

Size: 2" and 3" NPT or BSP male thread (standard)
Material: Heavy-duty cast aluminum body with stainless steel internal components
Pressure Setting: Typically opens at +2.5 to +6.0 inches of water column
Vacuum Setting: Opens at -6.0 to -10.0 inches of water column
Flame Arrestor: Integral flame arrestor element for explosion protection
Corrosion Resistance: Designed for harsh outdoor and hydrocarbon-rich environments
Protective Cap: Rain shield and insect screen included for outdoor installations
Maintenance: Easy-access design for servicing and cleaning
Certification: Complies with API 2000 / UL / NFPA standards (model-dependent)

Applications:

Underground Storage Tanks (USTs) at petrol pumps
Aboveground Fuel Storage Tanks
Vent lines of diesel, petrol, and ethanol-blended fuel tanks
Compatible with tanks used in IOCL, HPCL, BPCL, Reliance, Shell, Essar installations

Advantages:

Minimizes vapor losses and environmental impact
Prevents tank rupture or collapse due to pressure/vacuum changes
Protects fuel quality by limiting air ingress
Enhances safety with built-in flame arresting design
Long service life with rugged, corrosion-resistant construction

OPW Pressure Vacuum (PV) Valve for Vent Pipe