A diaphragm compressor, also known as a diaphragm-type compressor, is a reciprocating compressor that compresses and transports gas through the reciprocating motion of a metal or non-metal diaphragm within a cylinder. This equipment is widely used in chemical, nuclear power, hydrogen refueling stations, and medical fields, and is particularly suitable for handling high-purity, flammable, explosive, toxic, or corrosive gases.
Its cylinder is divided into a gas chamber and a hydraulic chamber by a diaphragm. The compression process employs a volumetric structure, completely isolating the gas from the lubrication system to ensure zero contamination of the medium. Based on the drive method, it is divided into two types: mechanically driven (rubber/plastic diaphragm) and hydraulically driven (metal diaphragm). The hydraulically driven type can achieve a discharge capacity of up to 100 Nm³/h, multi-stage compression pressure exceeding 100 MPa, and a single-stage pressure ratio as high as 25. The metal diaphragm thickness is typically 0.3-0.5 mm, employing a three-layer structure design and equipped with a leak detection system. Its lifespan depends on the material properties and surface treatment. The cylinder has excellent heat dissipation performance, the gas compression process is close to isothermal, the speed range is 300-500 rpm, and it has technical advantages such as compact structure, strong sealing and support for the compression of corrosive gases.