Fybroc's new line of non-metallic, corrosion resistant butterfly valves are ideal for handling corrosives, seawater, solvents and other difficult liquids. Standard model (1.5 - 12" 40 - 300mm) has a black polypropylene (PP) body, a polyvinylidene fluoride (PVDF) disc and a fluorocarbon (Viton) seat for superior chemical resistance and temperature capability316 stainless steel shaft has full engagement over the entire length of the disc and is a non-wetted partOnly solid plastic disc and elastometric liner are wetted partsStem retainer - polypropylene retainer to prevent stem removalSeat over tightening protection - molded body stops and seat stress relief areaSpherical disc design offers increased Cv, ultimate sealing and high cycle life18 position throttle plate for lever handle style