U.S. Plastic Corporation 4" t-57 bf vlv pvc/pp/fkm lever 21312

Type 57 Valve has no metal to media or environment contact whatsoever. Flange stopper prevents over-compressing liners due to improper installation. Absorption channel allows you to never worry about an over-tightened liner causing excessive stem torque. Spherical disc, gain higher Cv and extended valve life cycle as a result of new disc design. Offers superior corrosion resistance. 316/403 stainless steel shaft has full engagement over the entire length of the disc and is a non-wetted part, totally isolated from the media. Only solid and abrasion-resistant plastic disc and elastomeric liner are wetted parts. ISO bolt circle on top flange - no body or stem modifications required for accessories. PVC Body - PP Disc