Iron stop valves are a common type of valve, widely used in various industrial fields, including petrochemicals, water supply systems and manufacturing. Its main function is to control the flow of fluid in the pipeline and accurately control the flow by adjusting the opening and closing degree of the valve.
Complete iron stop valve includes a valve body, a valve cover, a valve disc, a valve stem and a handwheel (or an electric device). The valve body is usually made of cast iron or ductile iron, with good strength and corrosion resistance. The valve disc is the key control part of the fluid flow, changing the passage area of the fluid through the lifting action. The valve stem connects the valve disc with the operating device to ensure the precise movement of the valve disc.
The working principle of the iron stop valve is based on the lifting and lowering movement of the valve disc. When the handwheel or electric device of the valve drives the valve stem to rise or fall, the valve disc moves accordingly to adjust the opening of the fluid through the valve. When the valve is fully closed, the valve disc is in close contact with the valve seat and the fluid is blocked from passing; when the valve is open, the valve disc rises and the fluid can flow freely.
The technical parameters of the iron stop valve include nominal pressure, operating temperature, sealing grade and connection method. Nominal pressure indicates the maximum pressure level that the valve can withstand, and common ones include PN10, PN16, etc. The operating temperature is usually between -10℃ and 200℃. The sealing level affects the leakage performance of the valve, and a higher sealing level can effectively prevent leakage. Connection methods include flange connection, threaded connection, and welding connection, etc., which can be selected according to actual needs.
Iron stop valves are widely used in various industrial fields. In the petrochemical industry, it is used to control and regulate fluid flow to ensure the stability of the production process. In the water supply system, it is used to control water flow to ensure the normal operation of the water supply system. In the manufacturing industry, it is used to regulate the flow of fluids on the production line to improve production efficiency and product quality.
In order to ensure the long-term reliability and stability of the iron stop valve, regular maintenance is required. Common maintenance measures include checking the sealing performance, lubricating the valve stem, and cleaning impurities inside the valve body. These measures can effectively extend the service life of the valve and maintain its excellent performance.
In general, high-quality iron stop valves play an important role in various industrial applications with their reliable design and precise flow control capabilities. Understanding its structure, working principle, technical parameters and maintenance points can help users better select and use this type of valve.