1.Summary of ZJHM Pneumatic Sleeve Regulating Valve:

ZJHM pneumatic sleeve control valve is composed of multi-spring pneumatic film actuator and straight-through low flow resistance balanced sleeve valve. It has compact structure, light weight, sensitive movement, S-streamline fluid channel, small pressure drop loss, large valve capacity, accurate flow characteristics, power-pneumatic valve positioning or pneumatic valve positioner, which can realize the process pipeline. The automatic control of fluid medium is widely used to precisely control the process parameters of gas, liquid and steam, such as pressure, flow rate, temperature, liquid level, etc. to keep the given values. It is a new generation of universal control valve products in line with IEC standards.

2. Structural characteristics of ZJHM type pneumatic sleeve control valve:

1. Pneumatic sleeve regulating valve is the actuating unit of instrument in automation control system. It adopts electric-pneumatic valve positioner, uses electric signal and compressed air as driving force, receives 0-10mA DC or 4-20mA DC current signal input from control system, and converts compressed air into air source pressure signal input and output by regulator, which can realize split-range control.（ By changing the opening displacement of the valve, the precise adjustment and control of the technological parameters of the fluid medium can be achieved.

2. Pneumatic sleeve control valve can be divided according to the mode of action; Positive effect: pneumatic closed-normal open type (valve position downward displacement when signal pressure increases), "B type"

Reaction: Air Open - Normally Closed (Valve Position Displacement Up When Signal Pressure Increases), "K" Type

3. The pneumatic sleeve control valve adopts balanced spool, which has small unbalance force and stable operation. It is suitable for working occasions where the pressure difference between the front and back of the valve is large and the leakage is slightly larger.

4. The through low flow resistance sleeve valve core adopts the pressure balanced valve core structure (double sealing surface or single sealing surface). The valve core is cylindrical. After precise processing, it opens a window with certain characteristics, which is guided by the inner circle of the sleeve and the top. Therefore, the unbalanced force on the valve stem is very small, the operation is stable and the performance is good. It is a force balanced regulating valve. When the pressure difference between the front and back of the valve is high, the vibration caused by the eddy current impact is weakened due to the side guide of the sleeve. Therefore, the valve has the advantages of low noise, small cavitation flash and long service life. However, the leakage rate of the valve seat is slightly larger than that of the single seat valve.

5. By changing the design of the shape of the valve core, different flow characteristics can be obtained with different shape of the valve core window: equal percentage (logarithmic) and linearity.

This series of products are widely used in automatic regulation and remote control of industrial processes such as chemical industry, petroleum, metallurgy, power station, light textile, paper making and pharmaceuticals.

There are standard type, adjustable cut-off type, bellows sealed type, jacket insulation type and other varieties. The product pressure level has PN1.64.06.4 MPa; nominal diameter DN20-300 mm; applicable fluid temperature is - 60-450 C; according to the temperature, different valve caps can be divided into normal temperature type, high temperature type and low temperature type.

3.Main technical parameters of executing agencies:

4.Performance Indicators of ZJHM Pneumatic Sleeve Regulating Valve:

注:本产品执行GB/T4213-92国家标准.

5.Main parts and materials of ZJHM type pneumatic sleeve control valve:

6.Main technical parameters of JHM type pneumatic sleeve control valve:

7.Main Outline Dimensions of ZJHM Pneumatic Sleeve Regulating Valve：

VIII: Quotation Notes:

1. Valve body parameters: caliber, working pressure, valve body material, use of media, temperature, connection form and other parameters.

2. Actuator: Actuator form, control mode, control signal (4-20MA), mode of action (gas-open, gas-close)

3. If the type of control valve has been selected by the design unit, please report the type of throttle valve directly to our sales department for order.

4. If you need customization, you can contact us. Welcome to call: 021-66400088.

Please provide as detailed as possible about the parameters of the throttle valve, so as to facilitate our technicians to select the type accurately for you. If you have any questions, please call us 021-66400088. We will do our best to provide you with the best service.