4″ Supplemental Pressure Relief Device

Betts 4″ surge pressure relief valve (PRV) satisfies primary and supplemental pressure relief for specification US DOT406 and TC406 cargo tanks. The PRV meets the dynamic pressure surge requirements of 49CFR§178.345-10(b)(3)(ii) with less than one liter leakage as tested per TTMA RP No. 81. Set pressure is designed for use on a cargo tank with a 3.3 MAWP.

Part Number: RVP4FV-3.3
Material: 316 Stainless Steel with FKM Type A seals.
Mounting: Flange mount 8 holes, .44″ dia, on 5.88 dia. B/C. (4″ TTMA Piping Flange)Set Pressure: 3.63 to 4.55 psig (25.0 to 31.3 kPa)
Flow Rate: 173,156 scfh @ 6.25 psig (4,903 scmh @ 43.1 kPa)

See FW4SS flange weld neck for mounting to tank.