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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.

Pressure / Vacuum Vent

  • The P/V vent is constructed of high-grade, UV-resistant materials and premium internal components designed and tested to last.
  • A rain 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.
  • Includes 2" NPT vent stack adapter.
  • The internal female threads are compatible with OPW® vent stack adapters for easy retrofit onto existing sites.
  • Compatible with manifolded vent applications.

In-Line Vault

  • The cast ductile iron enclosure houses the P/V vent for added security and protection from the environment while also placing it at grade-level for safer, cost-effective maintenance and testing.
  • The vault includes a UV-resistant rain cap with a stainless steel mesh debris shield for the top of the vent stack.
  • The stainless steel gasketed faceplate includes a swivel pin that holds it in place during service.
  • Tamper-resistant screws secure the faceplate to the vault.
  • Eliminates wrenching at height.
  • Integrated drain plug facilitates draining of condensate.
  • 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)

Components

  1. P/V vent
  2. Rain cap
  3. In-line vault
  4. In-line vault faceplate
  5. Defender Series® vent stack adapter
  6. OPW® vent stack adapter (not available for purchase)

Dimensions

Materials

  • 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

Approvals/Certifications

  • UL2583 listed.
  • Meets the requirements of EPA 40 CFR part 63 for Gasoline Dispensing Facilities