Description
Model 3400
The Model 3400 pressure vents are designed for use on atmospheric and low-pressure storage tanks where pressure relief is required.
Technique: Under normal operating conditions, the pallet assembly is closed providing a vapor-tight seal. In the event the tank pressure increases to the set point of the Model 3400, the pallet lifts to vent excess vapors thereby protecting tank from dangerous over-pressurization. Pallet automatically closes and reseals when the pressure is reduced.
Quick Specs:
Body Sizes: 2″, 3″, 4″, 6″, 8″, 10″, 12″, 16″, 18″, 20″, 24″
Materials_Body: ALUM, CS, 304 or 316 SST, DERAKANE, HETRON
Materials_Spring Chamber: N/A
End Connections: ASME 150#, DIN, API 650
Temperature Range: -400 to 400F
Inlet Pressures Range: N/A
Model 4400
The Model 4400 spring loaded pressure relief vents are designed for higher pressure settings and are used in applications for normal or emergency venting pressure relief. The series 4400 vents are pressure only devices and as such do not provide vacuum relief. Vacuum relief must be supplied by the operating vent with which the tank is equipped. If vacuum relief is needed, see Valve Concepts, Inc., Technical Bulletin 3300, 3600, 4100, or the 4200
Technique: Under normal operating conditions, the spring-loaded pallet assembly is closed providing a vapor-tight seal. In the event the tank pressure reaches the set point of the vent, due to product movement into the tank, thermal expansion of the product and vapors or due to an emergency (fire involvement of the tank), the spring-loaded pallet lifts to vent excess vapors thereby protecting the tank from dangerous over pressurization. Once the over pressure condition is relieved the spring-loaded pallet closes to provide a vapor tight seal.
Quick Specs:
Body Sizes: 2″, 3″, 4″, 6″
Materials Body: ALUM, CS, SST
Materials Spring Chamber: N/A
End Connections: ASME 150#, DIN, API 650
Temperature Range: -400 to 400F
Inlet Pressures Range: N/A
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