Model 5400

Description:

The Model 5400 is designed for use on atmospheric and low-pressure tanks to reduce environmental emissions and product losses, when operating close to the set point.

Available Sizes

• 2" (DN50)
• 3" (DN80)
• 4" (DN100)
• 6" (DN150)
• 8" (DN200)
• 10" (DN250)
• 12" (DN300)
• 16" (DN400)
• 18" (DN450)
• 20" (DN500)
• 24" (DN600)

End Connections

Flanged

Features

• Easy Inspection: The Model 5400 incorporates the same rugged design found in all of Valve Concepts venting devices - they're made to last. The main valve seat can easily be inspected without affecting the set point. The pilot assembly uses standard o-rings. No special seal diaphragm or proprietary molded elastomers. Maintenance is easy and less expensive.
• Maintains Accurate Settings: The standard minimum setting is 2 inches WC, (1.2" WC with Air Assist). Maximum pressure setting is 15 psig. A certified test certificate is included with each vent verifying the accuracy.
• Air-Cushioned Seating: Vent pallet assembly incorporates a flat, smooth film of FEP Teflon to form a floating air seal. All units are tested to Valve Concepts, Inc. high standards to insure low leakage rates.

Technique

Under normal operating conditions, the pallet assembly is closed providing a tight seal. In the event the tank pressure increases due to product movement into the tank or thermal expansion of the product and vapors, the downward force on the pallet assembly increases providing a tighter seal. When the tank pressure reaches the set pressure of the pilot, the pilot assembly opens eliminating the additional downward force on the pallet assembly. The "full" tank pressure pushing upward on the pallet assembly will cause the main valve to open. Full flow will be achieved at no more than 10% overpressure. Once the overpressure is relieved the pallet assembly will reset providing a tight seal.