Design Features According to UL & FM
All interior bolt or screw that are exposed to pumped liquid shall be of rolled bronze or corrosion resistant materialThe pump shall be provided with automatic air-release valve, circulation relief valve and pressure gaugesBearings shall have an L-10 rating of not less than 5000 hours at maximum load.The pumps shall be provided with at least four packing rings plus a lantern ring. The lantern ring may be permitted to replace one ring of packing.Impellers, wear rings, shafts, lantern rings, glands shall be made of corrosion resistant material.Following material specifications are applied to STANDART UL/FM fire pumps:
