The GWL series energy-saving oil-free water lubricated screw low-pressure machines produced by Shanghai Granklin Group have many types of low-pressure compressors with a supply pressure of 0.15-0.4MPa in industrial production such as textile, glass, plastic, water treatment, chemical, cement, etc. The use of low-pressure compressors saves more than 30% energy compared to low-pressure screw compressors produced using conventional hosts, which can reduce huge energy losses.