#COMPRESSOR PORTABLE#

Vane compressors: use a slotted rotor with varied blade placement to guide air into a chamber and compress the volume.

Rotary screw compressors can be single-stage or two-stage

Rotary screw compressors: use positive-displacement compression by matching two helical screws that, when turned, guide air into a chamber, whose volume is decreased as the screws turn.

Using CFM to rate a compressor is incorrect because it represents a flow rate that is independent of a pressure reference. Still others are rated in Cubic Feet per Minute (CFM). *To a lesser extent, some compressors are rated in Actual Cubic Feet per Minute (ACFM). The capacities for both single-stage and two-stage compressors is generally provided in horsepower (HP), Standard Cubic feet per Minute (SCFM)* and Pounds per Square Inch (PSI). For this reason, these compressors are the most common units within the small business community. Two-stage compressors provide greater efficiency than their single-stage counterparts. Two-stage compressors normally fall into the 5 through 30 horsepower range. Single stage compressors usually fall into the fractional through 5 horsepower range. Piston compressors generally fall into two basic categories, single-stage and two-stage. When it is on its up stroke, the charge of air is forced out and into a storage tank. When the piston is on its down stroke, it draws air into the chamber. They use one-way valves to guide air into and out of a chamber whose base consists of a moving piston.

Piston-type: air compressors use this principle by pumping air into an air chamber through the use of the constant motion of pistons.

#COMPRESSOR PORTABLE#

Technical illustration of a portable single-stage air compressor

Common types of positive displacement compressors are Once the maximum pressure is reached, a port or valve opens and air is discharged into the outlet system from the compression chamber. Positive-displacement compressors work by forcing air in a chamber whose volume is decreased to compress the air. High-pressure air compressors (HPACs), which have a discharge pressure above 1,000 pounds per square inch (69 bar).Medium-pressure compressors which have a discharge pressure of 151 to 1,000 pounds per square inch (10.4 to 68.9 bar).Low-pressure air compressors (LPACs), which have a discharge pressure of 150 pounds per square inch (10 bar) or less.Compressors can be classified according to the pressure delivered: