News & Notes
The main products of this company are Bronze valves, API/DIN gate/globe/ check valves/butterfly valve/plug valve, ball valves and forged steel valves. Its products have been widely used in petroleum, petrochemical, chemical, metallurgy, electric power, water conservancy, machinery and many other fields.
In industrial pipeline systems, check valves are key components to ensure unidirectional flow of media, and their importance is self-evident. Check valves that meet the API 6D standard have become the first choice for industrial pipeline safety with their excellent quality and performance.
Oil and Gas Exploration and Transportation: Used in pipeline systems containing hydrogen sulfide and highly corrosive media to prevent safety hazards caused by backflow of media, and suitable for Class 150~2500 high-pressure environments26.
In industrial pipeline systems, check valves are key components to ensure unidirectional flow of media, and lug type check valves are one of the most popular ones.
The valve disc moves vertically along the center line of the valve body, and the inlet and outlet channels are linear. The structure is compact and the sealing surface wears evenly. It is suitable for small-diameter pipes of DN15~200mm1.
Oil and gas extraction and transportation: Applicable to highly corrosive oil and gas field pipeline systems containing hydrogen sulfide and carbon dioxide to prevent backflow of acidic media. 2205 duplex steel can withstand high pressure (Class 2500) and high temperature (≤350°C) working conditions58.
Corrosive Media Control: Applicable to acid, alkali and other corrosive media delivery systems. The sealing surface adopts Co-based carbide surfacing technology with excellent corrosion resistance (applicable temperature: -29~550℃, pressure ≤2500LB)13.
It mainly relies on the flow of the medium itself in the pipeline to generate power, thereby automatically opening and closing the valve. Specifically:
In pump stations, when the water pump stops working or suddenly loses power, the fluid in the pipeline may continue to flow due to inertia, resulting in reverse pressure. Pressure Seal Check Valve can quickly close to prevent the fluid from flowing back, thereby protecting the water pump and other equipment from damage.
Natural gas is a flammable and explosive medium. Residual oil and oxygen contact may cause violent oxidation reaction, resulting in seal failure or safety accidents12.
The working principle of High Temperature Check Valve is based on a simple and ingenious design: it relies on the flow of the medium itself to automatically open and close the valve disc, thereby realizing the function of preventing the medium from flowing back. When the medium flows in the normal direction, the pressure generated by it pushes the valve disc, so that it overcomes its own gravity and spring force (if there is a spring assist), thereby opening the valve and allowing the medium to pass smoothly. At this time, the valve disc is like being gently lifted by an invisible force, making way for the flow of the medium.
In the steel-like industrial pipeline network, the forged steel swing check valve is like a guardian in armor, using precision mechanical structure and high-strength materials to build a barrier against backflow, interpreting the philosophy of safety between movement and stillness.
Big Size Check Valve (nominal diameter ≥ DN300) uses a one-way flow design and relies on the kinetic energy of the medium to automatically open and close the valve disc, effectively preventing fluid backflow, avoiding pump reversal, pipeline water hammer and equipment damage16. Its lack of external power dependence simplifies the system control logic and reduces the complexity of operation and maintenance35.
