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TYPE 30 253 - Bare Air Compressor Block

This is a bare solid cast iron compressor block (Pump). It is a very old, but reliable design for heavy industrial applications.


Flywheel: 406mm X 3SPA

Motor needed 5.5kW – 7.5 kW  (7.5hp - 10 hp.)

Displacement at 610 rpm with 7.5 kW motor 690 liter/min.

Free air delivery at 610 rpm 518 liter/min

Number of pistons: 2

Stages: 2

Low-pressure piston diameter 127 mm and stroke 89mm

High-pressure piston diameter 76 mm and stroke 89mm

Maximum pressure: 17 bar

What is an Air Compressor Block?

Also called a reciprocating compressor block or bare piston compressor block, a compressor block is the part doing the compression of the air. A piston moving in a reciprocating motion within the cylinder compresses the gas. It is driven by an electric motor or another form of rotation. The pistons are moving up and down and compress the air from atmospheric pressure up to full tank pressure. As the volume decreases the pressure increases. The gas is then pushed out of the cylinder to the next stage of compression or to the discharge connection.

Exploded View

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