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Appearance structure and combination mode of pneumatic valve


Release time:

2021-07-30

If the valve is a device that promotes the transmission effect of the medium in the pipeline, thenPneumatic valveIt is a kind of valve equipment that can make the pipeline medium be balanced and regulated in the pipeline system, and it is generally called pneumatic valve for pneumatic conditioning valve. Due to the participation of pneumatic actuator, this valve can play an automatic conditioning and has certain conditioning function. What are the characteristics of the structure of this valve equipment? What are the characteristics of the combination? The following is an introduction:

Appearance structure and combination mode of pneumatic valve

If the valve is a device that promotes the transmission effect of the medium in the pipeline, thenPneumatic valveIt is a kind of valve equipment that can make the pipeline medium be balanced and regulated in the pipeline system, and it is generally called pneumatic valve for pneumatic conditioning valve. Due to the participation of pneumatic actuator, this valve can play an automatic conditioning and has certain conditioning function. What are the characteristics of the structure of this valve equipment? What are the characteristics of the combination? The following is an introduction:
Appearance structure: there shall be no scratches, cuts, pores, burrs, etc. on the end cover, end flange and box body of the casting cylinder. The exterior paint or chemical treatment layer shall be flat, lubricated, uniform in color and free of oil stains, indentations and other mechanical damage. Combination method: pneumatic conditioning valve-pneumatic valve positioner-pneumatic actuator. This is a combination method for commonly used pneumatic control systems. After the auxiliary effect of the valve positioner, the pneumatic actuator can be accurately positioned, and the pressure of the conditioning signal can be amplified to a certain extent, the output force (torque) of the actuator can be increased, and the stability of the actuator can be enhanced. Therefore, it is generally suitable for accurate positioning and large differential pressure.
After the production of pneumatic valves requires functional testing, manufacturers can carry out large-scale testing with a lot of capital and equipment investment in the later period, mainly in several functional aspects. The following is a brief introduction to the above points on functional testing.
The local requirement for testing pneumatic valves is the opening and closing torque under normal operating pressure. There is a specified target for this opening and closing torque. Moreover, under the condition of normal working pressure, it is also required to ensure the number of times the valve needs to be opened and closed in succession when it is closed tightly. This number should be within the target. If it exceeds this range, it is required to readjust and standardize its target value.
At the same time, when pneumatic valves are used in the whole pipeline system, attention should be paid to the flow resistance coefficient that occurs under the condition of conveying medium in the pipeline. The existence of this standard value will seriously threaten the sealing function of pneumatic valves.