The K411-122-1 compressor is designed to compress raw oil gas with a density of 0.824 to 1.12 kg/m3 at gas–processing plants and field compressor stations and to supply it to the common collector.
The compressor proper represents a two-cylinder three-section twelve–staged machine with vaneless diffusers. The L.P. cylinder sections feature opposite direction of the compressed air flow, which reduces leakages through the balance piston. The cylinder casings are horizontally split.The compressor is equipped with anti–surge protection and a bleedoff valve allowing for operation in the partial load conditions.
The tightness of the compressor cylinders is provided the end face seals.