Hydraulic and pneumatic door closers are two common types of door closers. In a hydraulic door closer, the spring tension is modulated by hydraulic fluid. In contrast, in a pneumatic door closer, the air pressure control valve controls the opening and closing of the door.
Pneumatic door closers are often installed on doors in the office or residence properties and are shock resistant. Hydraulic door closers are even better than pneumatic door closers in terms of load capacity and shock resistance. The applications of hydraulic door closers are quieter and more versatile. These advantages make hydraulic door closers popular on the market.