What Is a Compressed Air Receiver Tank?Īn air receiver tank (sometimes called an air compressor tank or compressed air storage tank) is what it sounds like: a tank that receives and stores compressed air after it exits the air compressor. If the air is leaking from the unloader valve, then see the page under Fixing Compressor Problems about air continuously leaking from the unloader valve for more information.What is a compressed air receiver tank-and how do you know if you need one? Our guide to compressed air receiver tanks explains how they work, what they do, and how you can use them to maximize the efficiency of your compressed air system. If air is leaking from the unloader valve when the air compressor is stopped, that points to a problem with the compressor tank check valve not seating properly, or its failure. If you notice that the pressure switch on your compressor is leaking air, locate the unloader valve, and try to determine if the air is leaking from the unloader valve or from the switch itself. Why a compressor pressure switch is leaking air – reason two In this manner the removal and re-installation is straightforward, you get a new diaphragm in the switch, and you also get new points, which are another wear item in a typical compressor pressure switch. If it were us, we’d simply purchase a new switch and replace the old. Disassembling them and reassembling them is, too, quite complex, particularly when you may only do it once or twice in a lifetime. Getting parts for pressure switches may be difficult. If, when the air compressor has reached cutout pressure and stopped, you notice that air is blowing out any openings in the pressure switch cover, or if you remove the cover and feel air escaping, and particularly if the unloader valve is plumbed outside of the switch, then you either disassemble the switch and replace the diaphragm, or you replace the switch with one of the same pressure and voltage rating as the old model. ![]() That may not necessarily be the case if the Resolution: If air is exiting the pressure switch cover, then it is almost certain that the diaphragm has failed. In this photo, note also that the unloader valve for this pressure switch is located on the outside of the switch. If you do this, ensure that the compressor has been unplugged from any power source. If the wire strain-relief fittings fill the apertures in the switch, then it may be necessary to pull the cover off the switch to investigate for leaks. In the photo above, the electric wire ports would be logical places for air to exit the cover should the pressure switch diaphragm have become holed. ![]() Reason one why your compressor pressure switch is leaking air is that, over time, the diaphragm inside the switch has cracked or worn a hole, and air is blowing from inside the tank, through the hole in the diaphragm, and existing the switch housing through any convenient opening. Why a compressor pressure switch is leaking air – reason one It is the tank pressure pushing on the diaphragm inside the pressure switch that causes the pressure switch to trip. of force is pushing on each square inch of the diaphragm inside the pressure switch. So, if the tank gauge reads 120 PSI, then there is 120 lbs of force pushing on each square in of tank area, and through the line up to the pressure switch, 120 lbs. ![]() Compressed air pressure pushes equally in all directions at the same time.
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