Since its establishment in 1956, Tong Cheng Iron Works Co., Ltd. has been manufacturing SWAN brand air compressors for over 60 years. With profound and long-experience technology, we design, mold, and make the relevant components by complying with the regulations of ISO9001and CE issued by TÜV , Germany . Our product lines include portable,wheeled, oil-less, silent , reciprocating and rotary screw air compressors for over 200 models . Besides our own brand, we are also capable to provide customers with ODM/OEM service.