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Valves & Actuation

Manual Plastic Butterfly Valves

Type-57P Butterfly Valves (1-1/2" - 14")

Type-57P butterfly valves are quarter turn valves with equal percentage type flow characteristics. They provide moderate flow control and therefore can be used for both on/off and modulating service. Good tolerance to suspended solids but not recommended for use with slurries or debris. The Type-57P butterfly valve is well suited for a wide variety of fluid flow applications.

New Design Features

  • Molded tag holes for valve identification and labeling
  • Redesigned indicator plate for lever handle models 0° closed to 90° open legend with 10° intervals
  • Increased internal sealing performance
  • New design disc and seat


  • 1-1/2"-14" PP/PP/EPDM
  • 1-1/2"-14" PVC/PP/EPDM



Data Sheet

New 10" and 12" Type-57P CPVC sizes now avilable!

CPVC Type 57P


Ideal Applications Include:

Isolation valves, control valves, chemical processing, water treatment, water features, fountains, aquariums, landfills, swimming pools, power plants, mining, transportation


1-1/2" – 14"

Body Materials:


Seat Materials:


Disc Materials:



  • 316SS stem with full disc engagement
  • Full seat design eliminates gaskets
  • Seat overtightening prevention
  • Lockout-Tagout – lever handle molded padlock provision and 2-molded valve body tag holes
  • Highly visible O° to 90° position indicator with 19 fine adjustment locking positions
  • ISO 5211 F07 – F14 bolt circle on top flange
  • Polypropylene stem retainer
  • Spherical disc design
  • Non-wetted stem and body - Isolated from the media
  • Plasgear™ operator

Molded tag holes for valve Identification and labeling

Redesigned indicator plate for Lever handle models O° Closed to 90° Open legend with 10°  intervals

Increased internal sealing performance – New design disc and seat