GB/T 4975-2018Displacement compressors vocabulary -- General (English PDF)

2.1 Compressor scavenging volume

The volume that the first stage compression element of the compressor is swept within one revolution.

2.2 Compressor theoretical volume flow

The volume that the compressor's first stage compression element sweeps per unit of time.

2.3 Clearance volume

The volume of the compression chamber occupied by residual gas at the end of the compressor cycle.

2.4 Relative clearance volume

The ratio of the clearance volume of a certain stage to the scavenging volume of the compression element of the stage.

2.5 Standard inspiratory position

A typical suction position is considered on the compressor, which varies with the structure and installation of the compressor.

Note 1. The standard suction position of a bare-packed compressor is generally at the first-stage intake flange or on the rotor casing. This position is generally used for inlet filtration for testing.

After the device or muffler, unless otherwise specified.

Note 2. If the manufacturer has no regulations, the standard suction position of the container compressor is at the position where the ambient gas enters the tank; or, for the non-closed box, the position is

Allows the gas to first enter the spatial position of an attachment such as a gas filter.

2.6 Standard exhaust position

A typical exhaust position is considered on the compressor, which varies with the compressor construction and installation.

Note 1. The standard exhaust position of bare compressors is generally at the exhaust flange.

--- Reciprocating compressor. used at the last stage (or only) exhaust flange or as required by the standard to reduce the flow of compressed gas

The various chamber outlet flanges are pulsating and this position is described in the relevant documents.

--- Swing compressor. The last (or only) rotor housing is at the exhaust flange.

Note 2. The standard exhaust position of the manifold is at the terminal exit.

2.7 Standard inspiratory position state

The state of the suction gas at the standard suction position of the compressor.

2.8 Standard exhaust position status

The state of the exhaust gas at the standard exhaust position of the compressor.

GB/T 13277.1 | GB/T 4976 | GB/T 19410 | GB/T 4980 | GB/T 4974 | […]