Weight loaded pallets in the vent housing allow the intake of air and the escape of vapors as the tank breathes due to thermal changes and product movement in and out of the tank. The pallets open and close to permit in breathing and out breathing necessary to maintain the tank pressure within permissible limits to avoid damage to the tank.
Construction Housing Material
The Model 3100 is a rugged design made to last. Available in Aluminum, Carbon Steel, 316 Stainless Steel or Corrosion Resistance Fiberglass. Trim Material: 316 SST - Standard on all metal vents. Fiberglass - Standard on all FRP vents. Pallet Diaphragm Material: FEP TFE - Standard. Also available in FKM, EPDM and Buna-N.
Modular: The Model 3100 end-of-line conservation breather vent is part of the Valve Concepts, Inc. modular vent product line. The Model 3100 can easily be field converted to a vacuum only vent, a pressure/vacuum vent with pipe away and can either be direct acting or pilot operated. Only Valve Concepts offers complete modularity throughout its complete vent product line.
Maintains Accurate Settings. Minimum setting available is down to 0.25 oz/in2 for both pressure and vacuum. Maximum setting upwards to 2 psig for pressure and 1 psig for vacuum, See Vent Weight Table. If higher settings are required see Valve Concepts Series 4000 Spring Loaded Vents or Valve Concepts Series 5000 Pilot Operated Vents. All vents are tested to Valve Concepts, Inc. high standards for both leakage and set point prior to shipment. A certified test certificate is included with each vent verifying the accuracy of both the pressure and vacuum setting and leakage. A leakage rate of less than 1 SCFH at 90% of set point is verified for both pressure and vacuum.
Condensate Drainage. Self-draining housing body and drip rings keep condensate away from seating surfaces, preventing freezing, binding and clogging.
Air-Cushioned Seating. Air-cushion seating provides tight sealing to reduce evaporation losses and the release of toxic vapors. The pallets have outer guiding and a center stabilizing stem to provide self alignment and tight seating.
Sizes - Connections. Available in Sizes 2" through 12". CS and SST vents have Raised Face Flange, Aluminum and FRP vents have Flat Face Flange to mate with standard ASME 150# flange connections. Ref to position 4 on coder for selection of DIN flanges