How to estimate the gas consumption of pneumatic ball valves? Cylinder volume, operating frequency, and simultaneous gas consumption

The gas consumption of pneumatic ball valves mainly depends on the volume of the matching cylinder, the status of the gas source, and the operating frequency, and is not directly calculated proportionally according to DN. Customers can first list the gas consumption for each cycle and the number of simultaneous actions, and then check whether the branch can meet the instantaneous demand.

Is it a single action or a complete loop that needs to be calculated first

The actuator opens and closes, which may inflate different chambers separately. A complete switching cycle with dual effects usually involves two working chambers; The air of the spring reset actuator is mainly used to overcome the spring and complete the pneumatic stroke. Two structures cannot use the same action value for each action. The standard liters per cycle provided by the supplier should indicate both pressure and cycle definition. Do not use the volume of process fluid transported by pipelines as cylinder gas, and do not replace the effective volume of a cylinder with the diameter of a valve.

Convert the work volume to the same reference state

The air in the air chamber is compressed, and the working state volume is different from the standard state air consumption. When used for rough estimation, the inflation volume can be converted according to the absolute pressure ratio, and the comparison process should be kept consistent with the temperature and reference state. The pressure gauge reading is the gauge pressure, and directly inputting it into the absolute pressure relationship will cause deviation. The effective volume of a rotary cylinder cannot be calculated solely based on the diameter of the casing. It is advisable to obtain the manufacturer's volume or gas consumption meter for this specification. Rough calculation is used for screening solutions and does not replace the design of a complete air system.

Calculate the average flow rate and instantaneous gas supply capacity separately

The average demand can be estimated by the gas consumption per cycle and the number of cycles per minute, taking into account continuous gas leakage and other equipment gas consumption. But when the interlock is activated, multiple valves may inflate simultaneously in a short period of time, and even if the average gas consumption is not high, the branch pressure will briefly decrease. The equipment groups, action windows, and remote minimum available pressures that operate simultaneously should be organized. The capacity of gas storage and pipeline network needs to solve the actual peak, not simply adding up the daily gas consumption of all valves and selecting compressors.

Increased gas consumption does not necessarily mean insufficient valve capacity

Replacing a larger cylinder may increase the demand for air storage and supply, while replacing a longer air pipe may also increase the volume that needs to be filled and discharged. The control method of frequently maintaining the middle position has different gas usage states compared to a simple switch. If the actual gas consumption is significantly higher than the design record, it is necessary to distinguish between changes in operating frequency, gas path leaks, and continuous exhaust of accessories, rather than directly increasing the supply pressure. The quotation comparison should list the actuator specifications, minimum gas source, complete cycle gas consumption, and number of actions to avoid only comparing the price of the ball valve body.

Comparison of selection information

Corresponding products and selection entrance

Prepare a "actuator cycle gas consumption action frequency simultaneous action group" table for gas source selection, which is more effective than only listing the ball valve DN. The valve load determines the driving demand, while the cylinder and air circuit determine the air demand. The two are related, but not the same parameter.

Related structures can be combinedPneumatic flange ball valve Q641F-16CUnderstanding of specific product information. See more similar directionsPneumatic Valve Product Column。

General principle data:Festo — Air consumption of the cylindersThe principle described does not mean that the finished product on this site adopts the manufacturer's configuration or rated value.