Ductile Iron QT450 Swing Check Valve Flanged End Blue Epoxy Coated Non-return Valve for Water Supply
Reliable Sealing & Low Pressure Drop Engineered swing disc design ensures a tight seal against backflow while maintaining a smooth flow path to minimize pressure loss.
Easy Maintenance Features a bolted cover design that allows for easy internal inspection and component replacement without removing the valve from the pipeline.
Strict PN16 Standards Fully tested to withstand up to 16 Bar working pressure, meeting international standards for industrial and municipal water applications.
Superior Corrosion Resistance Finished with heavy-duty blue epoxy coating (inside and outside) to prevent rust and ensure safe use in water treatment and irrigation.
Constructed with premium QT450 ductile iron, offering higher impact resistance and tensile strength compared to standard cast iron











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.