Pre-Owned. Lead-Free Forged Brass in-Line Ball Shut Off Valve, Quarter Turn, 1/4" Male NPT (MNPT) X 1/4" Femal… Limitations apply. You have to clean this to keep the safety valve away from malfunctioning. Top Rated Seller Top Rated Seller. Sign up to receive email updates and to hear what's going on with us! C $14.14. the nozzle or the disc) replace this part and it should be fine. C $51.48. Always use a lower pressure level than the maximum level of pressure that a compressor can take. That pressure cut out level may be in the 100 PSI through to 175 PSI level, depending on the brand and size of your air compressor. Digital air compressors, some of which are available at gas stations, allow you to set your desired tire pressure and the compressor will automatically shut off once it reaches that value. NPT female ports to standard 3/8 in. First of all, you need to find out how much pressure your air compressor can take. Husky Air Compressor: Won’t Shut Off and Won’t Build Up Pressure. So, let’s start with the steps-Fill your compressor with some air. Some pressure switches can only be adjusted when under pressure. • A slight air flow will remain as part of the automatic re-set function. C $14.14. So if you don’t find any problems with the safety valve, then check the pressure switch. $19.95. Air shut off valves; Engine turning mechanism; Compressor units & Hydraulic stations. Everything You Need To Know About Air Tools. This test will tell you whether or not your pressure relief valve is in working condition. Tire Valves; Tire caps; Valve extensions ; Tire Repair tools; Hose & Reels. We won't sell, rent, or trade your email. conditions, the OSHA COMPRESSED AIR SAFETY SHUT-OFF VALVES should suddenly activate and stop air flow. $14.48. Connects to air tank with 1/2 in. Regardless of whether your Porter-Cable Air Compressor is newer or you’ve been using it for quite some time, the truth of the matter is that every compressor machine will eventually run into a problem or two (or three). When the inlet pressure force is greater than the spring load, the safety valve opens in proportion to the increase in pressure and allows air to “leak out” as needed. Hi I have a hitachi compressive model number Ec12. It was a 150psi compressor, but the switch didn't shut off until about 155, which I assume was an … When the disc of the valve is old, it will have holes and crack in it. Right now, the switch is set on it's own line coming off the tank, all by it's lonesome. Add to Wish List. Replace the safety valve if it leaks air constantly. How do I adjust the safety valve on my air compressor? An average safety valve can easily last for 18 to 24 months. These valves close all ports in the off position to stop equipment in a locked position with air pressure holding it in place. (108) 108 product ratings - 90-120PSI Air Compressor Pressure Switch Control Valve Manifold Regulator Gauges. So it will, without any high pressure, start to discharge air out. The safety valve pops open to relieve excessive air pressure if the pressure switch fails to shut off the air compressor at the cut-out pressure setting. Another reason for a safety valve to pop open is when the pressure switch is damaged. Say 70 pounds for 70 degrees, 120 pounds for 100 F. Partho is a Mechanical Engineer and DIY geek. You have to set a pressure level initially for a safety valve. (75) 75 product ratings - 230V Pressure Switch Air Valve Manifold Compressor Control Regulator Gauges Set. I have cycled the compressor several times and the safety valve will close at different pressures. When pressure drops and should cut on it tries to start but wont. 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