What are the four stages of compression?

What are the four stages of compression?

Compression occurs within the cylinder as a four-part cycle that occurs with each advance and retreat of the piston (two strokes per cycle). The four parts of the cycle are compression, discharge, expansion and intake.

What is a reciprocating load?

The combination of the gas loads and inertia loads evaluated at the crosshead pin in the direction of piston motion are the “combined rod loads” to which API-618 refers. This load does not consider side forces on the crosshead or the 1/3 of the connecting rod weight that is usually considered to be reciprocating.

What is a compressor frame?

Frame. The compressor frame, shown in Figure 11-2, is a heavy, rugged casting containing all the rotating parts and on which the cylinders and crossheads are mounted. All frames are rated by the compressor manufacturers for a maximum continuous horsepower, speed (rpm), and rod load.

What is Rod runout in reciprocating compressor?

Piston rod runout is a measure of how well the cylinder is lined up with the frame and, also, how well the internals of the compressor (piston, rod, crosshead) are lined up with each other and the frame and cylinder combination.

What are the two main types of compression?

There are two main types of compression: lossy and lossless.

What is compressor rod load?

The term “rod load” has been used for decades to describe the maximum forces a reciprocating compressor assembly can withstand. Previous editions of API 618 used other descriptions and definitions for rating values of reciprocating compressors.

What is called compressor?

A compressor is a device that increases the pressure of a substance (usually a gas) by reducing the volume of the substance. Compressors are used in many applications, most of which involve increasing the pressure inside a gas storage container, such as: Compression of gases in petroleum refineries and chemical plants.

What is throw in reciprocating engine?

The throw is the measurement from the center of the crankshaft to the center of the crankpin journal, which is used to determine the stroke of an engine. The throw is equal to one-half the stroke. The longer the throw, the greater the stroke, or distance, a piston travels.

What is separator in compressor?

Inside of your air compressor, you will find an internal oil-water separator. The internal separator separates the water from the oil that stays inside the compressor. This is the oil that is used to lube the rotary screw and other internal parts.