CompAir was formed in 1968 when Holman Brothers and BroomWade, two respected British engineering firms, merged their compressor interests. Holman traced its roots to 1801 in Camborne, Cornwall, with strong mining machinery heritage, while BroomWade began in 1898 at High Wycombe. The group later passed through Siebe and Gardner Denver ownership and operates today as part of the Ingersoll Rand group.

The company is known for industrial compressed-air systems: rotary screw and reciprocating compressors, portable units for construction and mining, and complete compressed-air packages for factories and process plants. Its portable and stationary sets are frequently driven by diesel engines or electric motors, so engine knowledge is part of everyday CompAir service work. Many CompAir units remain in service for decades, which keeps demand for accurate service information high.

Workshop manuals for CompAir cover compressor service and overhaul, airends, valves, controls, cooling and safety systems, plus the supporting engine where fitted: diesel engine maintenance, fuel and electrical systems, torque specifications and scheduled servicing. Model-specific data helps technicians set pressures and clearances correctly. Service material also explains lubrication, filtration and airend maintenance, the areas that most affect compressor reliability and running costs.

Plant maintenance teams, compressor service engineers, hire companies and workshops that keep industrial CompAir equipment running will find factory documentation helpful for correct servicing, reliable air output and longer equipment life. Access to the original engineering data supports confident strip-downs, correct part selection and safe recommissioning of older machines still working in quarries and workshops.