Asahi/America Introduces New Butterfly Valve

Thursday, August 04, 2011

Asahi/America, Inc., a thermoplastic valve technology company, has recently expanded its line of valves to include the Type 57IL Isolator Lug butterfly valve. The Type 57IL Isolator Lug features a design whose the 316 stainless steel lugs are inserted into the valve body during the injection molding process, permanently combining the lugs and valve body into one unit.

The Type 57IL was designed to allow for removal of the downstream flange while maintaining full upstream line pressure. Encapsulating the 316SS lugs in the PVC valve body ensures that every Type 57IL comes factory-equipped with lugs. Asahi/America has simplified the field installation process by removing the directional requirement of their previous butterfly valve. Each Type 57IL is denoted by a bold “I” where the directional arrow would be on Asahi’s previous butterfly valve versions.

The Type 57IL Isolator Lug retains the features of Asahi/America’s Type 57 butterfly valve. Because of the flange stopper with absorption channel technology, it is still difficult to impact the performance of the butterfly valve by over-tightening the mating flanges of the Type 57IL. The molded flange stopper acts as a body-stop, limiting the compression of the valve’s full seat design liner. The absorption channel acts as stress relief by allowing for a molded body area for the valve liner to migrate to in the event of over-compression. The valve’s spherical disc was designed for high cycle life expectancy and improved flow characteristics across the valve resulting in higher CV values than previously achievable.

Asahi/America’s Type 57IL Isolator Lug butterfly valves are available in 3” to 8” as lever-style (with an option for a gear-operator) and 10” to 12” as gear-operator-style only. The Type 57IL features a non-wetted, low profile valve stem, ISO 5211 top flange mounting pattern, full seat liner design, and a molded padlock provision for lever handle models. The Type 57IL can also easily be electrically or pneumatically actuated using Asahi/America, Inc. actuators.


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