Spring loaded pressure relief vent designed to provide the pressure-actuated emergency venting as required by DOT406, NFPA No. 385, and No. 407.  With 1.25″ NPT male threads, this model may be installed from the tank exterior in such devices as manhole covers or pipe caps. Designed for a DOT406 cargo tank with a 3.3 psi MAWP.

Part Number:
4287ALV – Aluminum with FKM seals
4287ALB – Aluminum with Buna-N seals
4287SSV – 316 Stainless Steel with FKM seals
4287SSB – 316 Stainless Steel with Buna-N seals

Set Pressure:  3.63 psig

Rated Flow Capacity:
12,508 SCFH @ 6.25 psig

Aluminum weight:  .54 pounds
Stainless Weight:  .83 pounds

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