The main types of oxygen compressors include reciprocating piston, diaphragm, and centrifugal turbine types. The oil-free reciprocating piston high-pressure oxygen compressor uses a crank-connecting rod mechanism, with its moving parts lubricated by sealing grease. The entire compressor interior contains no thin lubricating oil. According to the standard JB/T12950-2016 "Oil-free Reciprocating Piston High-Pressure Oxygen Compressor," the main flow components, such as the cylinder, are manufactured using oxidation-resistant materials, and all parts undergo rigorous degreasing treatment before assembly. The diaphragm compressor consists of a closed, periodically changing volume composed of a diaphragm and valves. Driven by an electric motor, it increases the pressure of the gas medium. Its characteristics include extremely high airtightness, making it suitable for high-pressure applications requiring high gas purity.

The centrifugal turbine compressor (oxygen permeator) adopts a high- and low-pressure dual-cylinder, multi-stage compression, multi-stage cooling, and horizontally split centrifugal structure. The high-purity oxygen turbine compressor adopts strict fire prevention measures in its design, including degreasing treatment of all components, and all parts in contact with oxygen are made of copper-plated steel plates, copper-plated cast iron, copper alloys and stainless steel. Differential pressure controlled labyrinth seals are used to prevent oxygen leakage and lubricating oil leakage.