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Valves & Actuation

 Manual Plastic Butterfly Valves

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

Type-57P Lug 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 Lug butterfly valve is well suited for a wide variety of fluid flow applications.


Data Sheet

Ideal Applications Include:

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



2" – 14"

Body Materials:


Seat Materials:


Disc Materials:



• Type-57P butterfly valve

• PVC Body 2”, 2-1/2” & 14” – Other PVC sizes T-57IL butterfly valve

• CPVC Body 2” – 8”

• PP & PVDF body 2”- 14”

• Machined lug outsert design in 316SS (Standard) Titanium or Hastelloy

• Machined body design eliminates lug rotation

• Permanent factory assembly using custom design tools

• No valve flow directional requirement

• Requires no downstream mating flange for end of line applications*

• Full pressure rated when used with downstream mating flange

• Mating flange bolts length determination table provided by flange type