Franklin Fueling DPVV Defender Series® Pressure/Vacuum Vent w/ (1) In-line Vault and (1) Rain Cap regulates 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. It’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. Install in-line at grade with the in-line vault and rain cap. 

Features

• 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)
• Materials:
  P/V vent body: UV-resistant polymer
  Rain cap: UV-resistant polymer
  In-line vault body: E-coated cast ductile iron
  In-line vault cover: Stainless steel
• 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.