DN350 pneumatic diaphragm control valve (air-operated, normally open): How many liters of air are required per minute to fully close the valve?
Thread Content
DN350 pneumatic diaphragm control valve (air-operated, open on air pressure); how many liters of air are required per minute to fully close the valve? How many liters of air are required per minute when the valve is fully open?
This post was last edited by hfrs on 2018-12-5 09:41. The capacity of the control valve is 3.4 m3/h
Since it is a control valve, the gas consumption should be measured over a certain period of time; it makes no sense to discuss gas consumption only when the valve is opened or closed. According to the standards, this value is generally around 1 NM3/H.
If the air consumption of the control valve is not based on the manufacturer’s specifications, it can be estimated at 0.7 to 1.5 cubic meters per hour; for a dozen to several dozen units, an estimate of 1 cubic meter per unit is generally used. Even for the air consumption of a single valve, the manufacturer’s data provides only static and dynamic values. For control valves that use smart positioners, no operation results in no gas consumption ； A single-acting control valve consumes air only when it operates in one direction; exhaust is required only in the other direction. The more frequently the control valve operates, the greater the air consumption.
What size is the cylinder? Are there any specified dimensions?
It requires air when turned on, and exhaust gas when turned off, so no air is needed