RVPE4FB-3.3 - 4in DOT406 Pressure Relief Device Aluminum E-coated with Buna-N seals

4in DOT406 Pressure Relief Device
Betts 4in 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. The 4in PRV is ideal for use on small cargo tanks (< 400 gallons) where a 16in or 20in manhole is not feasible. Set pressure is designed for use on a cargo tank with a 3.3 MAWP.

Stainless Vent
Part Number: RVP4FV-3.3
Material: 316 Stainless Steel with FKM Type A seals.

Aluminum Vents
Part Number: RVPE4FB-3.3
Material: Aluminum E-coated with Buna-N seals.

Part Number: RVPE4FV-3.3
Material: Aluminum E-coated with FKM Type A seals.

Mounting: Flange mount 8 holes, .44in dia, on 5.88 dia. B/C. (4in 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 , FW4AL or 27912AL flange weld neck for mounting to tank.
Mounting gasket if available in various materials. See RGA401 style gaskets.