Franklin Fueling Systems Defender Series Pressure/Vacuum Vent Valve

Franklin Fueling Systems Defender Series® Pressure/Vacuum (P/V) vents regulate the pressure at which vapor is allowed to escape from the underground storage tank and the vacuum at which outside air is allowed to enter the tank. The P/V vent’s internal rolling diaphragm delivers consistent and controlled cracking for both low leak and high-pressure conditions while the superior construction of UV-resistant materials extends the overall service life. The in-line vault provides added protection and facilitates at-grade servicing and testing. This eliminates the added expense of lift trucks as well as the potential safety concerns of conducting work at height.

Note: Includes vent valve, sealing o-ring, and inlet screen only (Adapters, Vaults, and Flame Arrestor options sold separately).

Features

• The P/V vent is constructed of high-grade, UV-resistant materials and premium internal components designed and tested to last
• A vent cap with stainless steel mesh debris shield protects the system from water and insect intrusion
• The one-turn locking mechanism provides easy installation and removal for servicing
• High tolerance for over-pressure situations
• Compatible with all fuel types
• A rolling diaphragm achieves low leak rates and high flow rates with a tight and consistent seal
• Vent Stack Adapter available with 2 in. NPT or 2 in. BSPT threaded inlet (sold separately)
• Compatible with manifolded vent applications

Specifications

• Body: UV-Resistant Polymer
• Seals: UL Listed Elastomers
• Screens: Stainless Steel
• Vent (Rain) Cap: UV-Resistant Polymer
• Pressure Setting: 6.2 to 14.9 mbar (US Model)
• Vacuum Setting: -14.9 to 24.9 mbar (US Model)
• Pressure Leak Rate: ≤ .05 CFH at +2 in. WC
• Vacuum Leak Rate: ≤ .21 CFH at -4 in. WC
• Maximum Flow Rate: 8,000 SCFH at 2 PSI
• Operating Temperature: -22° to 122° F (-30° to 50° C)
• Approvals: UL2583 Listed

Downloads

PV Vent Installation Guide (PDF Download)

Defender Series PV Vent with Flame Arrestor Option Datasheet (PDF Download)