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. The 4″ PRV is ideal for use on small cargo tanks (< 400 gallons) where a 16″ or 20″ manhole is not feasible. Set pressure is designed for use on a cargo tank with a 3.3 MAWP.
SPECIFICATIONS:
| BRAND: | Betts Industries |
| MATERIAL: | Aluminum E-coated with Buna-N 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) |
