3. Domestic Series Injection Pump Domestic Series Piston mainly A, B, P, Z and Ⅰ, Ⅱ, Ⅲ number series. Series is based on a single-cylinder diesel engine power range of different requirements on the amount of oil, the variable displacement pump to the piston stroke, the pump cylinder center distance and structural type basis, and then were different sizes with piston diameter, composed of several in varying the amount of oil fuel pump within a work cycle, in order to meet the needs of a variety of diesel engines. After the hydraulic piston by hydraulic pressure of the hydraulic oil tank, variable pump parts, after every time you start the machine, such as hydraulic oil tank must be reached using air pressure, to operate machinery. Straight axis swashplate piston into two kinds of pressure from the sucking oil type. Oil pressure hydraulic pump were powered by air pressure in the tank, but also pump up the oil itself with the cylinder to provide pressure oil pump inlet. Since the suction-type pump self-absorbing ability is very strong, no external oil supply. Finishing variable pump | hydraulic factory direct hit grain (certified) | Variable pump from Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.