Air Compressor Switch Adjustment I have a Square D 9013GHG2 switch (145-175) that I am trying to tune down to 120-150 because my newly installed air dryer is rate up to 150 psi. You need to check your compressor’s safety rating and make sure you do not exceed the maximum pressure that your air compressor tank can bear. The non-adjustable pressure switches have fixed magnitude and you cannot adjust the pressure of this switch. You may still need to try to adjust the setting on a new pressure switch to match the old pressure switch settings. The ON OFF switch on your smaller air compressor is likely to be on your air compressor housing or panel, as is ours. The new settings of the pressure switch should be similar to the old one you had. You will know you have a bad pressure switch by a few signs. Locate a small metallic screw which is used to adjust cut-out pressure. The following post will cover the primary components of a pressure switch, what it is, how it works and how to adjust one. Find the differential screw on your pressure switch. On the other hand, if the screw is free then you can adjust the pressure. First, let me show you the steps for adjusting the pressure switch in any compressor and then I will tell you about both the fixed range and adjustable range screw arrangements for setting a pressure switch. If the compressor never reaches the cut out pressure level, it will run and run to … In that case, you would need to adjust the switch settings to match your compressor’s recommended settings. How to adjust the pump pressure control switch using the Square-D Pumptrol™ as an example: This article describes how to adjust building water pressure by setting the water pump cut-in and cut-out pressure on the well water pump pressure control switch. When the pressure switch reads the cut in pressure from the pump, it starts to run the compressor. This is used to adjust cut-in pressure. Please note that the default pressure range (cut-in pressure to cut-out pressure) of a pressure switch is set by the vendor and is normally written on the packaging or casing. Be careful! Yet there are times when you would need to change these settings. The adjustable pressure switches are the one where you can set the pressure according to your need. When the pressure inside the tank rises to the cut-out level, the switch stops the compressor’s motor by cutting its power flow. These pressure levels are called cut-in and cut-out pressures. £9.95. If not, then set the pressure switch again and make sure to drain the air out of the tank properly. To increase the cut-in pressure, move the differential screw clockwise. A pressure switch of an air compressor helps to start and stop the compressor automatically. Remove the cover from the pressure switch. Please note that all these adjustments might not be available on every air compressor pressure switch. It’s the electric counterpart to the piloted unloader valve which we discussed in a previous blog post. Turn the screw clockwise to raise the pressure at which your compressor’s motor shuts off. 1. Free postage. Some are non-adjustable and simple while others are flexible and allows pressure adjustment. Note that the difference in the cut-in and cut-out will always stay the same, 20 psi. Close the drain valve. Usually, of the two screws, the left one (or the one which is closer to the motor) is for the cut in pressure and the right one is for the cut out pressure. The cut-in and cut-out … Air Compressor Pressure Switch Control Valve 90-150 PSI 4 Port Heavy Duty 26 Amp 4.5 out of 5 stars (112) 112 product ratings - Air Compressor Pressure Switch … Dozyfrog.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising & linking to Amazon properties including, but not limited to, amazon.com, adjustable air compressor pressure switch setting. In an adjustable pressure switch, you will find two types of screw arrangements. First of all, disconnect your compressor from any kind of power source and take off the cover of the pressure switch. Next, you have to set the cut out pressure (for adjustable range screw arrangement only) as your requirement. Otherwise, your compressor will get damaged for unbalanced pressure adjustment. Therefore, be extra cautious when increasing the cut-out pressure. I run a mobile service. 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