Main features and application areas of pneumatic high-pressure ball valves

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　　The pneumatic high-pressure ball valve features a 90-degree rotation action; its plug body is spherical, with a circular opening or passage running through its axis. Ball valves are primarily used in pipelines to shut off flow, distribute it, and change the direction of the fluid flow; they can be closed tightly with just a 90-degree rotation and a very low torque. Ball valves are suitable for use as switches and shut-off valves, but recent developments have led to the design of ball valves that also enable throttling and flow control, such as V-ball valves. The pneumatic V-ball valve is a control valve with a right-angled rotary structure, and can be divided into pneumatic V-type control ball valves and pneumatic V-type shut-off ball valves. It is used in conjunction with valve positioners to achieve proportional control. 　　The main advantages of high-pressure ball valves are their compact structure, good sealing performance, simple design, and ease of maintenance. The sealing surface and the ball itself remain in a closed state, making them resistant to erosion by the medium flowing through them. They are easy to operate and maintain, and are suitable for use with various working media such as water, solvents, acids, and natural gas. They can also be used with media under harsh operating conditions, such as oxygen, hydrogen peroxide, methane, and ethylene, and are employed in many industries. The ball valve body can be integral or modular. The valve body type consists of a fully forged valve body for DN50 and below, and a three-section forged valve body for DN50 and above. The connection methods include flanged, welded, and threaded types (suitable for pressures up to PN45 MPa). An O-ring ball valve core is used, and the flow characteristic is approximately fast-opening. 　　The stem of the pneumatic high-pressure ball valve drives the valve core to rotate 90° within the valve body, enabling full open–full closed operation. Intelligent control and positioning can be employed; it works in conjunction with electrical valve positioners, and by feeding in a 4-20mA DC signal along with an air supply of 0.4–0.7 MPa, operation can be controlled to enable regulation of parameters such as pressure, flow rate, temperature, and liquid level. The Q611 pneumatic high-pressure ball valve is classified into metal-sealed and soft-sealed types based on its sealing performance. Pneumatic high-pressure ball valves feature a compact structure, small size, stable operation, good sealing performance, easy maintenance, and convenient installation. Pneumatic high-pressure ball valves are suitable for applications where the medium is viscous or contains particles and fibers. Pneumatic high-pressure ball valves are primarily used in industrial automatic control systems such as those in the petroleum, chemical, educational equipment, light industry, high-pressure equipment, and papermaking sectors, for remote centralized control or local control.