What does BAR mean for air compressors?

pounds per square inch
Pressure and capacity are the two main specifications to look for when buying an air compressor. Pressure is expressed in bar or PSI (pounds per square inch).

What is the device used to automatically stop the compressor?

When the pressure switch stops the compressor, the drain valves open automatically. First and second stage cooler drains (Figure 1) may be operated by solenoids or other means. The drain valves are also opened briefly on an intermittently timed cycle thus providing automatic draining as well as unloading.

Where is the unloader valve on an air compressor?

The unloader valve will most likely be located inside the pressure switch or attached to it on most air compressors. During the operation of the air compressor, the switch turns the compressor off which activates the unloader valve.

How do I identify my Craftsman air compressor?

The serial number will be located with the model number on the identification label or model tag. For the age of this compressor, the identification label will typically be a metal tag and is usually located on the tank body or around the motor shroud area.

What PSI should my compressor be?

Most air tools require between 70 and 90 PSI. Any light-to-medium-duty air compressor can easily handle 90 PSI, but you always want the compressor to supply more flow than needed. Pro Tip: Always respect a PSI rating. If you don’t supply enough air volume, the tool won’t operate correctly.

How is compressor controlled?

Most compressors have a surge control system. This is a gas path controlled by an automatic valve linking the inlet system to the output system. To prevent surge, once a drop in gas supply is noted, the valve linking the outlet pipe to the inlet pipe is opened.

Is compressor an open system?

Air compressor: Open system. Low pressure air enters and high pressure air leaves the compressor, electrical energy is supplied to drive the compressor motor.

What is a unloader valve on an air compressor?

What Is the Unloader Valve? A compressor unloader valve is a small part, typically measuring approximately 4-5 inches in length and width. It performs the critical function of releasing trapped air inside the tank, enabling the motor to restart.

Does an air compressor need an unloader valve?

The air compressor unloader is valve is a small, but important, part of the reciprocating piston compressor. It blows off the pressure inside the discharge pipe when the compressor stops.

What type of oil is used in a Craftsman air compressor?

The air compressor requires SAE30 weight non-detergent oil. Re: Compressor oil for Craftsman Remember, you can always use a full synthetic car motor oil in most compressors. If you compressor calls for a 30w, you can use 10w-30 full synthetic.

How much are old air compressors worth?

If you purchased or have a reliable back up compressor then sell the old compressor on any social or online auctions like craigslist for local listings or ebay for online auctions. A good rule of thumb would be $100 per 1 hp for good condition or $125 per 1 hp for great condition.

What kind of air compressor does Sears use?

Craftsman 27 gal. Oil-Lubricated Vertical Air Compressor Campbell Hausfeld 20 gal. Portable Air Compressor 135 psi 2 hp – Case Of: 1 BLACK+DECKER Craftsman 6 gal. Pancake Portable Air Compressor 150 psi 0.8 hp – Case Of: 1; California Air Tools CAT-10020SPCAD 2 HP 10 Gallon Oil-Free Stationary Air Co… Campbell Hausfeld 26 gal.

How does an external bypass work in an air compressor?

As the name implies, this control method uses an external bypass around the compressor to recycle gas from the compressor discharge to the inlet, or to the atmosphere in the case of an air compressor. The take-off point for the bypass must be downstream of a heat exchanger so that cooled gas will be spilled back to the suction.

What do you need to know about compressor combo kits?

Whatever home repair project you have in mind, compressor combo kits have everything you need to get up and running with less hassle. From replacement tanks and hoses to pressure regulators and air chucks, Sears has a wide array of air compressor accessories to help you get the most out of your electric or gas air models.

How big is a craftsman vertical air compressor?

Craftsman 26 gal. Air Compressor Kit with Impact Wrench & Ratchet Craftsman 27 gal. Oil-Lubricated Vertical Air Compressor How’s your shopping experience on this page? All the pros know that an air compressor is a powerful, efficient way to keep the job site running smoothly.