The 1st 2 from the 2/2 air valve refers back to the variety of “working” air plug-ins which are in the valve body. Which is, the quantity of plug-ins that offer air on the device, and station the compressed air to anything that the control device is supposed to do?Most 2/2 valves can have numbers or words etched, cast or painted close to every one of their two “working” air plug-ins. If you can find figures close to the plug-ins, the amount 1 would be the offer harbor to give the compressed air to that valve. Dock amount 2 is the operating slot from where air would stream to accomplish no matter what task which you wished for that valve to complete.
If the port designations are characters, then dock ‘A’ would be the source harbor and slot ‘B’ the operating slot.If the 2/2 valve is usually to be “air controlled”, that may be an outside air transmission is to be accustomed to change the two/2 device, you will see one more harbor. That harbor may not have a designation or it may say ’12’. No, that’s not much of a dozen, but rather suggests that air will flow from harbor 1 to dock 2 when an outside air signal works that control device.The 2nd 2 inside a 2/2 air control device indicates the number of roles that this inner control device system has. If this valve is operated or actuated, it is going to either wide open or close up. At rest, that is certainly when the outside device proprietor is not triggered, the inner control device will either continue to be wide open or shut down.
Most 2/2 compressed air valves are classified as NC. NC stands for normally shut down. Which means that when the valve is not actuated, its typical condition is shut down, and compressed air cannot pass through it?There are some apps for a couple of/2 valves where movement of air through the valve when it is not being operated is desirous. A NO or normally available device would then be determined. When this type of 2/2 device reaches sleep, compressed air will circulation through it, and is particularly only once the control device is actuated the stream of air will stop, info here https://justaircompressor.com/best-12v-air-compressor-reviews/.