Ingersoll Rand manufacturers two bare compressor blocks designed specifically for use with natural gas.
Both the 20H40NG and the 05H25NG are reciprocating, positive-displacement compressors. Gas is confined within a cylinder where the volume is reduced by the action of compression.
How the bare block compressor operates:
A piston moving in a reciprocating motion within the cylinder compresses the gas. 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.
Each compressor includes a LOL (low oil level) switch, gauge panel and coolers.
The Ingersoll Rand natural gas compressors are four stage units.
The 20H40NG Block Interstage Pressures are as follows:
Stage 1 – inlet 20 psig to 200 psig (1.4 kg/cm2 to 14 kg/cm2)
Stage 2 – 800 psig (56 kg/cm2)
Stage 3 – 2400 psig (169 kg/cm2)
Stage 4 – 5800 psig (408 kg/cm2)
Why buy a CNG Bare Block Compressor?
Many customers replace worn blocks on their existing CNG compressor skids with brand new blocks. They simply remove the old block and put the new, factory warranted block in its place. It is fast and it is economical!