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Sleeve Control Valve

product-466-571

Structural Features

The electric sleeve control valve can be easily replaced with a linear flow characteristic sleeve or an equal percentage flow characteristic sleeve according to different flow characteristics requirements, and sleeves with different flow capacities can be replaced according to different flow requirements.

Electric sleeve control valves have less impact on leakage under high temperature applications. Unlike the double-seat control valve, the leakage volume increases greatly under high temperature conditions because the sleeve and the valve core are made of the same material, have similar shapes, have the same expansion coefficient, and have similar deformations at high temperatures, so the leakage volume does not change much. . (Generally, the valve core and valve seat of the regulating valve are not made of the same material, so the leakage will increase as the temperature increases)

Its stability is better than that of a double-seat control valve. When the opening of a double-seat control valve exceeds 60-70%, an unstable area will appear, causing the valve core to oscillate. However, the electric sleeve control valve has no unstable area and no unbalanced force will occur. The reversal phenomenon, while the guide parts of the valve core and sleeve are large, will not cause vibration.

The sleeve is pressed onto the valve body through the upper valve cover. Unlike single and double-seat valves, the valve seat is connected to the valve body through threads, so it is very convenient to disassemble and assemble, and the valve body does not need to be removed when disassembling the sleeve. For instrument maintenance workers, this is the most outstanding advantage when it is removed from the pipeline.

Since the bottom of the valve plug is flat, when cavitation occurs, the shock wave generated by the bursting of the bubbles acts in the chamber below the valve plug. The impact energy does not act on the valve plug, but is absorbed by the medium itself. However, the impact energy of single- and double-seat valves acts directly on the head of the valve core, so the damage caused by cavitation of sleeve valves is smaller than that of single- and double-seat valves. On the other hand, the sleeve sealing surface is separated from the throttling surface (window), and the medium flows through the seal at high speed and then the washout is greatly reduced. Therefore, the service life of the sleeve valve is longer than that of single and double-seat valves.

Advantages

product-483-404