• Product Image- Type 57 Butterfly Valves

    • Stainless steel shaft has full engagement with disc and is a non-wetted part isolated from the media by double O-ring seals on top and bottom trunnions of disc.
    • Only disc and liner are wetted parts.
    • 1 1/2"-8" with lever handle.
    • 8"-24" with gear operator.
    • PVC body has Polypropylene disc standard.
    • Flange Stopper – prevents over-compressing liners due to improper installation.
    • Absorption Channel – Never worry about an over-tightened liner causing excessive stem torque
    • Spherical Disc – Gain higher Cv and extended valve cycle life as a result of new disc design
    • Plasgear Plastic gear operator – The first industrial non-metallic gear box, offers superior corrosion resistance

  • asvType57LIS

    Type 57 LIS Butterfly Valves

    Standard Features (Sizes 3" – 8") 

    • Direct Replacement for metal valves conforming to ISO-5752 Short Face to Face dimensions.
    • Standard model has PVC body with PP disc for superior chemical and corrosion resistance as well as elevated temperature capabilities.
    • Non-wetted 316 SS stem has full engagement over the entire length of the disc and is totally isolated from the media.
    • Full seat design isolates the body and stem from the media and acts as mating flange gaskets
    • Integral body stops in valve body to prevent overtightening of mating flanges
    • Spherical disc design for improved CV’s and superior durability
    • Integral locking lever handle w/21 position throttling plate
    • Plasgear™ operator – Industry first composite enclosure gear-operator
    • Integral ISO-5211 top mounting pad for actuation mounting
    • Polypropylene stem retainer to prevent stem removal