Type-57IL Isolator Lug Butterfly Valve (3″ – 12″)
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Butterfly Valves

Type-57IL Isolator Lug Butterfly Valve (3″ – 12″)

Type-57IL plastic butterfly valves are quarter turn valves designed for use in applications where one-side flange removal may be periodically required. They feature a PVC body with fully molded 316 stainless steel threaded lug inserts for connection to the mating flanges. Type-57IL butterfly valves permit one side flange removal, while maintaining full line pressure on the opposite side. 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-57IL butterfly valve is well suited for a wide variety of fluid flow applications. Can be pneumatically or electrically actuated.

Resources:

Data Sheet

Specification

Ideal Applications Include:

Isolation valves, water treatment, water features, fountains, aquariums, landfills, swimming pools, power plants, mining, transportation.

Certifications:

Specifications:

Sizes:

Lever: 3″ – 8″
Gear: 3″ – 12″

Non-IL style lugged valves available for 1-1/2″ – 2-1/2″ and 14″-24″ sizes

Body:

PVC

Seats:

EPDM, FKM, and Nitrile

Seals:

Same as seating material

Models:

Lug Style

Operators:

Lever and Gear

Discs:

PVC, PP, and PVDF

Stems:

316 stainless steel, Titanium, Hastelloy C® ‡

  • Standard model (3″ — 12″) has PVC body and PP disc for superior chemical resistance and elevated temperature capabilities
  • Our 316 stainless steel stem 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
  • Stem retainer-PP retainer to prevent stem removal
  • Seat over tightening protection-molded body stops and seat stress relief area
  • Spherical disc design offers increased Cv, ultimate sealing and high cycle life
  • Over molded 316 stainless steel factory lug that allows bidirectional installation
  • Plasgear™ gear operators for 3″– 12″ standard