P/V Vent With In-Line Vault
P/V Vent With In-Line Vault
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.
With typical Pressure/Vacuum (P/V) vents only lasting a single 3-year test cycle, Defender Series® P/V vents are built to outlast other vents in their class. With high-grade, UV-resistant materials and premium internal components, Defender Series® P/V vents provide precision regulation of storage tank pressure for the long-haul.
Defender Series® 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. Check out these premium design highlights.
Almost half of all injuries in our industry come from falls at height. The in-line vault allows for safe, cost-effective grade level testing and maintenance while also providing extreme protection from the outdoor elements.
Ensure your tank venting system is tight and dependable in any pressure condition. The premium construction of the internal rolling diaphragm delivers consistent and controlled cracking for both low leak and high-pressure conditions.
Vacuum pressure causes the poppet to pull away from its upper seal, letting air in to rebalance the tank pressure.
Vapor pressure in the tank pushes the poppet away from its lower seal, letting vapor out to rebalance tank pressure.
For high pressure cracking scenarios, the rolling diaphragm allows the poppet to open even further to let a larger volume of vapor out of the tank.
Defender Series® P/V vents are dual-threaded, making them easy to swap out with existing 2” P/V vents. The standard size hex nut integrated into the top of the rain cap makes installation with a standard wrench simple –no specialized tools required.
The internal female threads are compatible with OPW® vent stack adapters for easy retrofit onto existing sites as well as most common test devices.
New or Retrofit
Defender Series® P/V vents come with an included vent stack adapter which threads easily on to a 2” vent stack for new or retrofit applications.
Install in-line at grade with the vault and rain cap or end-of-line with the Defender Series® vent stack adapter. The P/V vent is also compatible for retrofit onto existing OPW® vent stack adapters.
- Pressure setting: 2.5" to 6.0" WC
- Vacuum setting: -6.0" to -10.0" WC
- Pressure leak rate: ≤ .05 CFH at +2" WC
- Vacuum leak rate: ≤ .21 CFH at -4" WC
- Maximum flow rate: 8,000 SCFH at 2 PSI
- Operating temperature: -22° to 122° F (-30° to 50° C)
- P/V vent
- Rain cap
- In-line vault
- In-line vault faceplate
- Defender Series® vent stack adapter
- OPW® vent stack adapter (not available for purchase)
- P/V vent body: UV-resistant polymer
- Seals: UL Listed elastomers
- Screens: Stainless steel
- Rain cap: UV-resistant polymer
- In-line vault body: E-coated cast ductile iron
- In-line vault cover: Stainless steel
- UL2583 listed.
- Meets the requirements of EPA 40 CFR part 63 for Gasoline Dispensing Facilities
In-Line Tank Venting
Install in-line at grade with the in-line vault and rain cap.
(1) Defender Series® P/V vent with (1) In-line vault and (1) rain cap
End-of-Line Tank Venting
Install end-of-line with the Defender Series® vent stack adapter
Defender Series® P/V vent, and Defender Series® 2" vent stack adapter
Retrofit & Replacement Parts
Order a P/V vent compatible with OPW® P/V vent adapters to retrofit existing OPW® vent stack adapters.
|804023901||Vent (rain) cap|
Defender Series® P/V vent (includes O-rings for both Defender Series® and OPW® vent stack adapters)
Maintenance kit includes inlet screen (includes O-rings for both Defender Series® and OPW® vent stack adapters)
|804110902||Vault faceplate gasket|
|804110903||(2) replacement tamper-resistant screws for vault faceplate|
|804110904||Vault service plug, prevents vapors from escaping during maintenance|
|804110905||Vault L-key wrench (T40 tip size)|
|FFS-0216 (UL) FFS Product Catalog.pdf||55.99 MB|
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|TB0223-01 Defender Series PV Vent Annual Inspection.pdf||0.09 MB|