The Chemline Type 57, from Chemline Plastics Ltd, is the new updated version of the Type 56 Series. The redesigned hand lever no longer has external metal parts. The Type 57 has a redesigned valve “top flange” and shaft, now conforming to ISO for standardized actuator mounting. These valves offer a large range of sizes and selection of body, disc and seat materials. This allows them into a wide range of on/off or throttling control applications.