Duo-Chek阀门早已成为低压降、防反向流保护的代表。这些阀门是由铸铁、铸钢、不锈钢和各种各样的合金材料制成。 Duo-Chek止回阀可提供无固定器的结构设计，符合API594面间距尺寸，钢制阀体，分对夹式和支耳式两种结构，阀门内件有多种材料可选，包括金属密封和弹性软密封阀座。 该阀门较大尺寸为48”，压力等级高达Class 4500。 Duo-Chek高性能止回阀 Duo-Chek高性能无撞击止回阀是源自上世纪五十年代末期在市场上推出的Mission对夹式止回阀。 可按您的要求提供阀门口径、压力等级和结构型式，以满足应用中为苛刻的要求。 Duo-Chek® High Performance Non-Slam Check Valves Duo-Chek® valves have long been the standard for low-pressure drop flow reversal protection. These valves are made from cast iron, cast steel, stainless steel, and a broad variety of exotic materials. Duo-Chek offers retainerless designs to API 594 end-to-end dimensions in steel bodied wafer and lug style with a wide variety of trim materials including both metal and resilient seats. Valves come in sizes up to 88" and pressure ratings up to class 4500. Duo-Chek® high performance non-slam check valves are the original Mission Manufacturing Company wafer check valves introduced to the market in the late 50's. The valve is available in the sizes, pressure classes and configurations required to meet the most demanding of applications. Our product range includes, but is not limited to: Sizes: 2" to 88" ASME Pressure Class 125 through 2500 API 6A and 6D pressure classes DIN, JIS, BS, AS, and ISO standards are also available Wafer, lug, double flanged and extended body styles Configurations available in retainered and retainerless style Body Materials: Cast Iron, Carbon Steel, Stainless Steels, Duplex Stainless Steel, Super Duplex Resilient Seat Materials: EPDM, Buna-N, Neoprene, and Viton-B® Integral and overlaid metal seats also available End Connections: Raised Face, Plain Face, Ring Joint, Weld-End, Hub-End Viton® is a registered trademark of DuPont Performance Elastomers L.L.C.