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zui为苛刻的要求。我们的产品范围包括，但并不限于此：
 

• 阀门口径：2” 至 88”。
• ASME压力等级Class 125至Class 2500。
• API6A和6D压力等级。
• 亦可供DIN、JIS、BS、AS和ISO标准。
• 对夹、支耳、法兰连接方式以及加长阀体型式。
• 可提供有固定器和无固定器两种阀体结构。
• 阀体材料：铸铁、碳钢、不锈钢、双相不锈钢、超级双相不锈钢
• 弹性阀座材料：乙丙橡胶、橡胶、氯丁橡胶、硅橡胶和Viton-B®氟橡胶。
• 亦可供整体式和堆焊式金属阀座。
• 连接型式：突面、平面、环连面、焊接、卡箍。

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. 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
• Wafer 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