pneumatic valve work

How do pneumatic valve work

Published On December 10, 2018 | By admin | Shopping

Pneumatic valves mostly work on compressed air. These systems require safe and precise control of the actuators. Their medium is fluid, similar to those that of the hydraulic and water process system. Although, their execution is different from that of the liquid.

The working of the pneumatic valve may seem like bread and butter to you but there is a whole level of preparation which goes into the working of the pneumatic valves. We have discussed the working of the pneumatic valve and the process by which they are able to complete their work efficiently.

Air preparation

Relief valves are used in receivers and appropriate for the air preparation stage. Pressure regulators limit the pressure by blocking the pressure upstream at the inlet. Regulators are used in the air preparation stage as well.  Regulators can control the pressure within the main grid while sometimes air is piped directly into the workstation or machine. The pressure at this head should be maintained at 120 psi or more while a branch circuit can be regulated at 90 psi.

pressure gauge port

Since most of the regulators are capable of relieving the downstream pressure, the downstream pressure does not elevate as a result of thermal expansion. Many-a-times, a filter is attached to the regulators. The regulator has an inlet port, an outlet port,and a pressure gauge port.

Flow controls

In pneumatic systems, valves are present to control the flow. The options of different types of flow valves are lesser than that of the pressure or directional valves. However, most circuits apply them for easy adjustments of the cylinder or motor velocity. Controlling velocity in pneumatic systems is more complex than the hydraulic system. It is because pressure difference is more in the working ports of the cylinder.

Meter in and meter out are the two ways of application of the flow control valves. In metering in, the rate of airflow is controlled as it enters the motor or cylinder. During the metering in the process, the cylinder will move with high force and efficiency while the piston motion will be spongy and unpredictable. During metering out, the velocity of the cylinder will be more stable and repeatable, while the dynamic force and efficiency are lost in the pushing energy of the flow control. However, most of the pneumatic valves use the metering outflow controls as the difficulties in metering out can be easily overcome by increasing the pressure of the upstream.

Conclusion

Pneumatic valves have great efficiency and can make your devices and applications durable for a very long time.

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