GUARDIAN™ 407/412 PRESSURE/VACUUM VALVE (4" NPS SWIVEL, PTFE SEALS, 30 PSIG MAWP)

The Betts’ Guardian™ combination valve is a spring-loaded reclosing pressure and vacuum relief device/valve for use on a cargo tank’s primary pressure and vacuum relief system. The combination relief valve is designed, tested and marked in accordance with US DOT 49CFR §178.345-10, §178.347-4 and §178.348-4. The body and O-ring holder are constructed of 316L stainless steel with PTFE standard seals for compatibility with a wide range of products and temperatures.

• Vibration Resistant Magnetic Vacuum Seat
• 3” or 4” NPS Swivel mounting available
• Compact optimized flow design
• Seal tabs on shroud and body
• Multiple seal material options
• Minimum Bursting Pressure: 200 psi [13.8 bar]

Part Number: RVC4ST-30
Size / Connection: 4" NPS Swivel
Seal Material: PTFE
Cargo Tank MAWP: 30 psig (set pressure 36 psig)
Weight: 20.5 lbs