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
Electric Actuation
- Series 19 On/Off (Electric Actuator)
- Series 19 Failsafe (Electric Actuator)
- Series 19 Modulating (Electric Actuator)
- Series 19 Modulating Failsafe (Electric Actuator)
- Series 10 (Electric Actuator)
- Series 92 (Electric Actuator)
- Series 94 (Electric Actuator)
- Tandem Electric
Pneumatic Actuation