WCB Cast Steel Swing Check Valve Class150 Flanged End API Standard Non Return Valve for Oil Gas Steam Pipeline
EN:Valve body adopts WCB carbon steel casting, excellent mechanical property, good high temperature & pressure resistance, resistant to thermal deformation.
ANSI Standard Compliance EN:Designed per ANSI B16.5, API 6D standard, Class150 pressure grade, flange dimension fully matches American standard pipeline
Swing Structure Design EN:Swing clapper internal structure, large flow channel, small flow resistance, less medium pressure loss to save pump power consumption.
Opening & Closing Performance EN:Valve clapper swings flexibly relying on medium flow, automatically open/close to prevent medium backflow effectively.
Sealing Performance EN:Metal hard seal design, wear-resistant sealing face, tight shut-off, suitable for high temp steam, oil & gas with tiny solid impurities.
Bolted Bonnet EN:Bolt-connected bonnet with lifting lug design, convenient to disassemble for internal maintenance without cutting pipeline.
Working Condition Range EN:Class150 rated pressure, suitable for working temperature up to 425℃, widely for high temp industrial working conditions.
Full Size Range EN:Complete specification from NPS2~NPS24(DN50-DN600), Class150/300/600 multi pressure class optional.
Application Medium & Industry EN:Fit for water, steam, crude oil, natural gas, petrochemical medium; used in petroleum, chemical, power plant, heating industry.
Strict Pressure Test EN:All valves pass shell hydro test & sealing test as per API standard, zero leakage before delivery.
Flange & sealing surface CNC precision machining, flatness controlled strictly to ensure flange installation tightness.
Custom Support EN:Customizable: CF8/CF8M stainless steel material, Class300/600 high pressure, special connection end as customer drawing.













Qingdao Yida Tongtu Machinery Technology Co., Ltd., in the beautiful coastal city of Qingdao. Specializing in high-growth ventures such as valves and power equipment, the company is dedicated to providing comprehensive solutions for industries including petroleum, chemicals, and water utilities, empowering clients to grow and achieve success.
We are a cutting-edge trading enterprise specializing in one-stop industrial valve matching, deeply cultivating gate valves, globe valves, ball valves, check valves, butterfly valves, etc. Our main products include American standard API, German standard DIN, and Japanese standard JIS, suitable for various industries such as chemical, petroleum, gas, power, metallurgy, etc.
We selects qualified factories from the source, strictly controls product quality, adheres to the direct supply mode, and relies on the advantages of a streamlined and efficient team to achieve rapid implementation of customer demands. At the same time, we can provide customers with standard spot goods, non-standard customization, OEM, project batch matching, and a complete set of export documentation services, becoming a long-term stable valve procurement partner for customers with professionalism, reliability, and high cost-effectiveness.













Our mission is to offer "High Quality" & "Good Service" & "Fast Delivery" to help our clients to gain more profits.