The high-pressure ball valve came out in the 1950s. With the rapid development of science and technology, the continuous improvement of production technology and product structure, in just 40 years, it has rapidly developed into a major valve category. In the industrially developed countries in Western countries, the use of high-pressure ball valves is increasing year by year. In our country, ball valves are widely used in petroleum refining, long-distance pipelines, chemical, paper, pharmaceutical, water conservancy, electricity, municipal, steel and other industries , Occupy a position in the national economy.
Application range of high-pressure ball valve: Floating ball valve is suitable for general industrial use. Floating ball valve is also suitable for chemical, petroleum, natural gas, metallurgical and other industries and hydrogen sulfide-containing media, many impurities, and serious corrosion of natural gas long-distance pipelines. Floating ball valves are divided into ordinary carbon steel series WCB and A105 based on the shell material according to different usage requirements; stainless steel series 304,316; low temperature steel series LCB, LCC; sulfur resistant series, etc.
Structural features of high-pressure ball valve: The main feature of the floating ball valve is that the ball has no supporting shaft. The ball is held in a "floating" state by two valve seats. It is mainly used to cut off, distribute and change the direction of medium flow in the pipeline. The main features of the floating ball valve are the valve seat sealing design, the reliable inverted sealing valve sealing rod, the anti-static function, automatic pressure relief and locking device and other structural features.
Operation and use of high-pressure ball valve: 1 Make sure that the pipeline and valve have been flushed before operation. 2 The operation of the valve drives the valve stem to complete rotation according to the size of the input signal of the actuator: when it rotates 1/4 turn (90°) in the forward direction, the valve is closed. When reverse rotation 1/4 turn (90°), the valve opens. 3 When the direction indicator arrow of the actuator is parallel to the pipeline, the valve is open; when the indicator arrow is perpendicular to the pipeline, the valve is closed.
Having a long service life and maintenance-free period will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data