These are high-capacity compressors, which are applied for sandblasting, drilling-and-blasting, pipelines tests, fiber-optic communication lines laying, etc. These ompressor units are equipped with efficiency control system which functions on the basis of idle - capacity - idle approach. It is controlled with the VMC intake valve (Italy), which is sensitive to working pressure changes in the receiver-oil separator. The working pressure can be regulated in the range 87.02- 435.11psi (6 – 30 bar). These units have given a good account of themselves both in Russian southern and northern regions, where oilfields, gas fields and diamonds deposits (JSC Alrosa) are developed.