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Model PAF 406-98 Surge, DOT 406 Pressure Relief Device
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Betts PAF 406-98 Surge Suppression Pressure Relief Valve is the proven leader for cargo tank longevity, protection and safety.

The 406-98 incorporates a 10” (254mm) reclosing pressure relief valve (PRV) that satisfies primary 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 PRV cover also serves as a quick-open inspection hatch that incorporates a secondary safety catch. PPVL models include an overturn compensating 6496 P/V normal vent.

PAF 406-98 Surge PRV’s have a maximum service temperature of 212°F (100°C).  Stainless versions of the PRV are available using prefix “PPSS”.  See Betts’ line of PAF306 surge PRV’s for use on MC306 cargo tanks.

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