1. Convenient installation and maintenance. The valve seat is tightly pressed on the valve body through the valve cover, without thread connection, and is convenient for installation and maintenance.
2. Convenient change of flow characteristics. The fluid in the sleeve valve flows outward from the sleeve, which is called the center outward flow direction, and vice versa. It is the structural diagram of straight through sleeve valve with flow direction from outside to center. Three, four or six throttling openings are symmetrically distributed on the sleeve. The shape of the throttling opening is related to the required flow characteristics. Therefore, the sleeve (the shape of the throttling opening) can be easily replaced to change the flow characteristics of the control valve.
3. Noise reduction and cavitation shadow mouth direction reduction. In order to reduce the noise of the control valve, the sleeve and valve core can also be opened with several small holes. The small holes can be used to increase the resistance and convert the speed head into kinetic energy, so as to reduce the noise. Generally, the sleeve valve can reduce the noise by more than 10dB, so it is widely used in the occasions where noise reduction is required. In order to reduce the noise of control valve, multi-stage pressure reduction method can also be used, such as multi-stage valve core and sleeve structure. Since the total pressure drop at both ends of the control valve is distributed to all levels, all levels will not cause flashing and cavitation of the fluid, thus reducing the noise of the control valve, and can weaken and prevent the erosion and wear caused by flashing and cavitation. The bottom of the sleeve valve core is flat. In case of cavitation, the impact generated by bubble rupture will not affect the valve core, but will be absorbed by the medium itself. Therefore, the sleeve valve has little cavitation impact and long service life.
4. The leakage is larger than that of single seat valve. Since there is a graphite piston ring seal between the sleeve and the valve core, after long-term operation, the wear of the seal ring makes the leakage of the sleeve valve larger than that of the single seat valve
5. Strong interchangeability and versatility. Different flow coefficients and flow characteristics can be obtained by replacing different sleeves.
6. Reduce the influence of unbalanced force. Generally, the sleeve valve core is provided with a balance hole, which greatly reduces the unbalanced force on the valve core. At the same time, it has a damping effect, which is beneficial to the stable operation of the control valve. Therefore, this type of control valve is often used in applications with large pressure difference and low noise requirements.

3. During installation, the pneumatic actuator shall not be installed upside down. It shall be installed vertically and horizontally within 180 degrees.