Model 4200

Description:

The Model 4200 Spring Loaded Vent provides pressure and vacuum relief in applications where higher pressure settings are required and that require vapors to be piped away.

Available Sizes

• 2" (DN50)
• 3" (DN80)
• 4" (DN100)
• 6" (DN150)

End Connections

Flanged

Features

• Modular Design:The Model 4200 pipe-away conservation vent is part of the Valve Concepts, Inc. modular vent product line. The Model 4200 can easily be converted to a vacuum only vent or end-of-line pressure / vacuum vent and can either be direct acting or pilot operated. Only Valve Concepts, Inc. offers complete modularity throughout its complete vent product line.
• Maintains Accurate Settings:The minimum pressure setting is .5 oz./ in² and the minimum vacuum setting is .5 oz/ in². Maximum pressure setting is 15 psig and maximum vacuum setting is 15 psig. Lower settings may require weight loading instead of springs on vacuum side. All vents are tested to Valve Concepts, Inc. high standards for both leakage and set point prior to shipment. A certified test certifcate 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 keeps 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 into the outlet piping, except under normal breathing conditions. The pallets have outer guiding and center stabilizing stem to provide self alignment and tight seating.

Technique

A spring loaded pallet on the pressure side of the vent allows the discharge of vapors to the outlet piping when the tank pressure exceeds the set point and a weight loaded/spring pallet on the vacuum side of the vent allows the intake of air when the tank vacuum exceeds the set point. The pallets open and close to regulate the tank pressure within permissible limits to avoid damage to the tank as the tank normally breathes due to the thermal changes or product movement. Virtually eliminates the intake of air and the escape of vapors, except during normal tank breathing, thus reducing product loss.