Specialityvalve is a top Super duplex check valve manufacturer in India. We supply to Telangana, Haryana, Punjab and Rajasthan. A super duplex check valve is a specific type of check valve that is made from a material known as "super duplex stainless steel." Duplex stainless steels are a family of stainless steels that have a mixed microstructure, consisting of both austenite and ferrite...