UL Listed emergency vent (pressure relief only) used on aboveground storage tanks, as a code requirement that helps prevent the tanks from becoming over-pressurized and rupturing if exposed to fire. The vent must be used in conjunction with a "normal vent". Correct application of this vent requires proper vent size and selection for the tank system in order to meet the specific venting capacity requirements. The new design increases protection against weather, improves manufacturability and helps limit and control dust accumulation.
Features
- Pressure inside the tank forces the cover to lift up off the vent seat, allowing air to exhaust
- Center pin guides the movement- when the pressure falls the cover lowers back down onto seat and the vent is automatically reset
- Aluminum body with Viton O-Ring Seat
- UL listed
Specifications
- Size: 2 in.
- Venting Capacity: 31,917 CFH at 2.5 PSI
- Mounting Connection: Male NPT
- Pressure Setting: 8 oz/sq in.
- Cover: Brass
- Seat Material: Viton
- Body Material: Brass
- Diameter: 3 in.
- Height: 2.96 in.
- Bolt: Zinc plated steel
Approvals
- California Air Resource Board (CARB)
- Phase 1 Enhance Vapor Recovery (EVR)
- AST Certified Products (VR-402-B)
- Underwriters Laboratories Inc. UL-2583
