Pneumatic valve air consumption

The judgment of air consumption of pneumatic valve can be based on the following two formulas:

Double acting pneumatic valve air consumption: VP = (A + B) [(P + 0.1)/0.1] n

Single-acting pneumatic valve air consumption: VS = B [(P + 0.1)/0.1] n

Symbol Description:

VP Air consumption of pneumatic valve when double acting L;

VS Air consumption of pneumatic valve at single action L;

A and B cylinder volume L;

P operating pressure MPa;

T operation time S;

n action times.

Pneumatic valve is a valve driven by compressed air. Pneumatic valve using compressed air to promote the actuator within the multi-group combination of pneumatic piston movement, force transfer to the beam and the characteristics of the inner curve track, driven by the hollow core spindle for rotary motion, compressed air air air disk lost to the cylinders, change the inlet and outlet position to change the direction of rotation of the spindle, according to the load (the valve) the required rotating torque requirements, you can adjust the number of combinations of cylinders to drive the load (the valve) work.

The size of the gas consumption depends on the degree of frequency of adjustment, and has nothing to do with the cylinder or membrane.

Regulating valve gas consumption is continuous, switching valve is intermittent, but the action of the instantaneous gas consumption is very large, can not be considered with the usual gas consumption.

PS: Regulating valve 1Nm3/h

Switching valve 2Nm3/h

Pneumatic actuator static theoretically does not consume gas, but the control * part such as valve positioner to consume gas.

Pneumatic instrumentation design generally requires that the static per minute is less than or equal to 5 liters (0.4MPa), in fact, according to the 8 to 12 liters.

Pneumatic actuator actual gas consumption and action frequency related, so the number of pneumatic instrumentation in the proportion of larger margins to enlarge some.

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