EN Catalog 2021-22 - Catalog - Page 169
DEFENDER SERIES®
PRESSURE / VACUUM
VENT WITH FLAME
ARRESTOR OPTION
Defender Series® Pressure/Vacuum (P/V) Vents regulate the pressure
at which vapour 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.
SPECIFICATIONS
Pressure / Vacuum Vent
• The P/V vent is constructed of high-grade, UV-resistant
materials and premium internal components designed and
tested to last.
• Pressure setting: US model: 6.2 to 14.9 mbar
EN model: 35 mbar maximum
CN model: 20 to 30 mbar
• A vent cap with stainless steel mesh debris shield protects
the system from water and insect intrusion.
• Vacuum setting: US model: -14.9 to 24.9 mbar
EN model: -2 mbar maximum
CN model: -15 to -20 mbar
• The one-turn locking mechanism provides easy installation
and removal for servicing.
• Pressure leak rate: ≤ .05 CFH at +2" WC
• High tolerance for over-pressure situations.
• Maximum flow rate: 8,000 SCFH at 2 PSI
• Compatible with all fuel types.
• Operating temperature: -22° to 122° F (-30° to 50° C)
• A rolling diaphragm achieves low leak rates and high flow
rates with a tight and consistent seal.
• Vent Stack Adapter available with 2" NPT or 2" BSPT
threaded inlet.
• 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 vent 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.
SERVICE STATION
HARDWARE
HIGHLIGHTS
• Vacuum leak rate: ≤ .21 CFH at -4" WC
Materials
• P/V vent body: UV-resistant polymer
• Seals: UL Listed elastomers
• Screens: Stainless steel
• Vent (rain) cap: UV-resistant polymer
• In-line vault body: E-coated cast ductile iron
• In-line vault cover: Stainless steel
Approvals/Certifications
• UL2583 listed.
• Three models to meet the cracking pressure requirements
for regions following the US, UK, and China standards.
• Flame Arrestor meets EN ISO 16852.
• Eliminates wrenching at height.
• Integrated drain plug facilitates draining of condensate.
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