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Thermoplastic Butterfly Valve features non-wetted shaft.

Press Release Summary:

Offering direct replacement for ISO-5752 short pattern metal butterfly valves, without any modification to existing piping system, Type 57LIS comes in 3-8 in. sizes with PVC body and PP disk for chemical resistance. Made of 316 stainless steel, shaft has full engagement over entire length of disk and is totally isolated from media. Applications include chemical processing, water and wastewater, landfills, irrigation, food processing, and mining.

Original Press Release:

Type 57LIS Butterfly Valve (NEW-Now Available)

Direct Replacement for ISO-5752 Short Pattern Metal Butterfly Valves


We have expanded our line of butterfly valves with the introduction of the the Type 57LIS, which provides for easy direct replacement of metallic butterfly valves and conforms to ISO-5752 short face-to-face dimensions.

The Type 57LIS butterfly valve is an industrial quality thermoplastic valve that directly replaces metallic butterfly valves, without any modification to the existing piping system, in applications where metal valves constantly corrode. The face-to-face dimensions of the Type 57LIS (the distance between the two existing flanges), are the same as those of the metal valves that the Type 57LIS replaces.

Features and Benefits

  • Standard model (3" - 8") has PVC body and PP disc for better chemical resistance at temperatures higher than can be achieved with PVC.
  • Our 316 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.

  • Sizes: Lever: 3" - 8"
    Gear: 3" - 8"
  • Models: Wafer or Lug style
  • Operators: Lever and gear
  • Body: PVC
  • Discs: PVC, PP and PVDF
  • Seats: EPDM, FKM and Nitrile®
  • Seals: EPDM, FKM and Nitrile®
  • Stems: 316 stainless steel, titanium, Hastelloy C®

    Available Actuators
  • Series 79 Pneumatic
  • Series 92 & 94 Electric
  • Series 83 Electromni

  • Pneumatically and electrically actuated with accessories
  • Alternate discs:
    - (I) PVC : 3" - 8"
    - (III) PVDF : 3" - 8"
  • Gear operators for 3" - 8"
  • Stems in 304 stainless steel, titanium, Hastelloy C® etc.
  • 2" square nut on stem
  • 2" square nut on gear operator
  • Stem extensions (single stem and two-piece stem)
  • Locking devices (gear type - standard on lever)
  • Chain operators
  • Manual limit switch
  • Tandem arrangements (patented by A/A, Inc.)

    Typical Applications
  • Chemical Processing
  • Water & Wastewater
  • Landfills
  • Irrigation
  • Food Processing
  • Mining

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