The unloader valve is a small part of a pressure washer that plays a big role in controlling the strength of the water coming out of your pressure washer. CAP#: 18267 Air compressor elbow unloader valve fits most Kellogg American, Pumps 335tvx , 452tvx Simply remove old valve, install new valve and adjust. Air compressor unloader valve. Turn off power to the compressor or unplug it. Air compressors are everywhere! To do that safely and like a pro, you need to learn how to adjust the unloader valve on the pressure washer. When that happens, the pilot opens and pressurizes the unloader valve, causing the unloader valve to open and excess air from the compressor to vent to atmosphere. Of course, you need to learn how to adjust unloader valve on pressure washer. If you have questions, call us toll free at 1-800-310-3573. This is evidenced by the continuous hissing sound that you will hear. Centrifugal Unloader valve leaking when stopped Adjust or replace unloader Replace in-tank check valve Hydraulic Unloader Faulty 7 Hydraulic unloader valve passes air to suction unloader when running oil pressure less than 15 psig Hydraulic unloader valve passes air to suction Unscrew both locknuts and remove the adjustment from … That’s where the unloader valve comes in. The unloader valve opens when the pressure reaches cut-out, and stays open until the pressure in the tank reaches the cut-in pressure level. Adjust the compressor to the minimum load pressure setting and turn the compressor off. Unloader valves combine all of the components required for a continuous run compressor application: a pilot valve, a vent valve and a check valve. When the compressor is unloading, listen and feel for any excessive air being released at the top of the valve or the stem. Screw the pressure screw back into its place slowly. If your electrically powered air compressor is having a hard time starting, try pulling the power cord, and opening the drain valve to void all air from the tank. This arm or finger is further connected to the small valve pin which controls the air compressor unloader valve. Compressor Pressure Switch Adjustment. The how-to video below shows how to adjust a pilot unloader valve, or click on this link to view the downloadable .pdf instructions: This will effectively emulate the operation of the unloader valve, as any air trapped over the piston will flow into the tank as the tank pressure drops. When the compressor stops, the pressure in this pipe is blown off to 0 bar (atmosphere). As the compressed air is used and the pressure drops to the load setting, the pilot closes and depressurizes the unloader valve. Once the air pressure in the air compressor tank reaches a predetermined level, the check valve trips the motor to turn it off, triggering the air compressor unloader valve to open. That’s where the unloader valve comes in. This can be used on gas engine or electric motor driven air compressors. The air compressor unloader valve is often located near the air tank of the unit and is usually part of the pressure switch assembly. Failure to do so could result in serious injury. Before you jump onto the steps of adjusting the unloader valve, you should learn some basics of a pressure washer. C) You may have a leaky pilot valve. The valve is approximately 1/2 inch across and stands out from the compressor approximately 3/4 of an inch. They are typically located on the side of the compressor tank or near the top situated to one side of the air outlet. I got a manual for the compressor, but its just for the pump, and does not show the air line connections. Piloted Unloader Valve Adjustment Do not set up, operate or service this componentuntil you read and fully understand the air compressor owner’s manual. Common problem: Air compressor unloader valve leaking. Sometimes, the air evacuating from the unloader valve would not stop. Conrader Piloted Unloader Check valves are an all-in-one combination valve to run an air compressor for continuous operation. If your electrically powered air compressor is having a hard time starting, try pulling the power cord, and opening the drain valve to void all air from the tank. Save money and troubles by learning how to set your air compressor pressure switch the right way! This will effectively emulate the operation of the unloader valve, as any air trapped over the piston will flow into the tank as the tank pressure drops. Your compressor has unloader valve issues? The unloader valve is a small part of a pressure washer that plays a big role in controlling the strength of the water coming out of your pressure washer. I just picked up a small dental compressor (Duerr Dental Tornado 130) that seems to have a bad unloader valve. Pressure relief valves can be used wherever a low-flow, variable-pressure relief valve is required. Hi, as a test, I ran the compressor up and once it cut out, unplugged the hose that runs from the one way value to the unloader/pressure switch – at the unloader valve end, expecting only a short burst of air from the cylinder and no more as the one way valve would prevent this.