Model 4600

Description:

The Model 4600 spring-loaded vacuum relief vents are intended for use on low pressure tanks, vapor recovery systems and process systems where higher vacuum relief is required.

Available Sizes

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

End Connections

Flanged

Features

• Modular Design: The Model 4600 spring-loaded side mounted vacuum vent is part of the Valve Concepts, Inc. modular vent product line. The 4600 is used in the pressure/vacuum vent with pipe-away and the pressure only vent with pipe-away. These vents can either be direct acting (weight-loaded or spring-loaded) or pilot operated.
• Maintains Accurate Settings: The minimum vacuum setting available is 1.0 psig. Maximum vacuum setting is 15 psig. As with every vent supplied by Valve Concepts, Inc. a Certified Test Certificate is included verifying the accuracy of both set point and leakage rate. On all direct acting vents supplied by Valve Concepts, Inc. the leakage is less than 1 SCFH at 90% of the customer specified set point. The standard unit is suitable for intermittent back pressures of 50 psig. Higher back pressure ratings are available on request.
• 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 for low evaporation loss. The pallets have outer guiding and center stabilizing stem to provide self alignment and tight seating.

Technique

The spring-loaded pallet in the vent housing allows the intake of air necessary to maintain the tank pressure within the permissible vacuum limit to avoid damage to the tank. Once the vacuum condition is satisfied and the pressure is within the permissible limits the spring-loaded pallet closes. The Model 4600 virtually eliminates the intake of air except during normal tank in breathing.