The Betts Guardian RVC3AT-35 Combo Valve is a spring-loaded, reclosing pressure and vacuum relief device for a cargo tank's primary pressure and vacuum relief system, designed, tested, and marked in accordance with 49CFR178.345-10, 178.347-4, and 178.348-4. It features 316 stainless steel construction with Teflon seals and wear components, a safety stop screw to help prevent accidental unthreading of the housing, and seal tabs on the shroud for added security. The compact, optimized flow design mounts via a 3-inch ANSI flange connection and is rated for a 35 psig MAWP tank.
Technical Specs List
- Size: 3 inches
- Connection: ANSI Flange
- Body Material: 316 Stainless Steel
- Seal Material: PTFE
- Temperature Range: -40F to 400F (-40C to 204C)
- Tank MAWP Rating: 35 psig
- Set Pressure: 42 psig
- Rated Pressure Air Flow Capacity: 457,740 SCFH @ 52.5 psig
- Water Flow Rate: 1,075 gpm @ 52.5 psig
- Set Vacuum: 1.5 psig
- Rated Vacuum Air Flow Capacity: 12,500 SCFH @ 3.0 psig
- Minimum Bursting Pressure: 200 psi (13.8 bar)
- Weight: 21.0 pounds




