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Veeder=Root eVRgreen Carbon Canister <br />tndrinsicaNy sate valve Nass" <br />Serviceable Filter <br />Active Carbon Bed <br />4 inch Plenum. Bottom & Top <br />• TLS monitors containment ullage space pressure <br />• When pressure is positive (nighttime low or no <br />dispensing), TLS opens valve to reduce pressure <br />• Vapor/air mix flows into canister <br />HC's adsorb (load) onto carbon <br />• Cleansed air is vented to atmosphere <br />When pressure is negative (daytime dispensing), TLS <br />holds valve open to purge HC's from carbon <br />• Air from atmosphere flows into top of canister <br />HC's desorbs (purge) from carbon <br />■ HC's return to ullage space in UST's <br />• Installs on the vent -stack <br />• Vertically -mounted cylindrical container with activated <br />carbon <br />• Inlet to carbon chamber at bottom of canister from <br />vent pipe <br />• outlet from carbon chamber to atmosphere at top of <br />canister via solenoid controlled valve and fixed -sized <br />orifice <br />• Valve & control module has intrinsically -safe electrical <br />connection to TLS <br />BENEFITS <br />• Balance system <br />• Fewer permit concerns <br />•Quicker EVR installation <br />• Lower equipment cost <br />• Lower installation cost <br />r1 <br />U <br />