HC91 series double acting single rod piston hydraulic cylinder is the actuator agency of reciprocating linear motion in hydraulic system, has characters like simple structure, reliable performance, easy assembly and disassembly, easy to maintain, both ends with buffer and various connection types. This series hydraulic cylinder and JB2162-91 can be used interchangeably, increasing installation types from three to five of JB2162-77 standard, with same connection size and nice appearance, are used in metallurgy, mining, engineering, petrochemical and other industries.