Manual Plastic 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

Data sheet - Type 57IL Butterfly Valve

Specifications

Specifications - Type-57IL Butterfly Valve

Ideal Applications Include:

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

Specifications

Size:

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^® ‡

Features/Benefits

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