Pressure relief valves act as a fail-safe for reciprocating plunger pumps, pressure vessels and testing lines, etc. The open/close pressure is controlled by belleville washers. When the pressure exceeds the preset limit, the valve will release pressure automatically. When the pressure drops below the preset limit, the valve will close automatically to protect the personal and equipment safety. Jereh pressure relief valves feature high strength, wide pressure range and stable performance. The pressure containing parts are forged from premium alloy steel and the metal melting and heat treatment process guarantee the hardness and strength. Various belleville washer stack configurations are available for different pressure ranges. The special treatment of the pressure relief mechanism provides stable sealing performance. To meet diverse customer needs, Jereh offers pressure relief valves suitable for cementing, acidizing, fracturing and testing lines. Customized design is also available.

Check valves are widely used in high pressure pipeline to control fluids flowing in one way and stop fluids from flowing back to the pump, protecting pipeline safety. Jereh check valves are available in three types including top-entry, dart and flapper. The top entry and flapper types adopt completely wrapped flappers to extend the service life, and they are mainly used in fluid services. Dart check valves feature dual seals between stainless steel and seal ring and they are mainly used in gas services.

Reel swivels are mainly used in coiled tubing units with one end connected to the coiled tubing and the other end connected to surface manifold to rotate under pressure. Jereh reel swivels feature excellent sealing capability and strong corrosion resistance. Special sealing configuration and components ensure higher sealing performance and longer service life. Key seal surfaces are treated specially to enhance corrosion resistance. To meet diverse needs, Jereh offers two basic types (U-shape and L-shape) both for standard and sour gas service. Customized design is also available.

Swivel joints are fittings used in manifolds which can change angles and rotate 360° for flexible connection in a limited space. Jereh swivel joints are forged from premium alloy steel with metal melting and heat treatment processes to ensure strength and hardness. Based on analysis of weight, erosion and blasting resistance, Jereh swivel joints are designed with optimum wall thickness. Introduction of advanced imported equipment and machining process ensures the uniformity of wall thickness. With weight not changed, Jereh swivel joints feature long erosion life and high safety factor. Special seal structure and material significantly enhance the sealing capability and service life.