It conforms to the national standard GB/T17906-1999 "General technical conditions for hydraulic rescue tools", designed for opening the door, used for all kinds of dangerous door and door opening, fast speed and stable performance. It has a rated expansion force of 42.3KN and a piston stroke of 152 mm. Its rated working pressure is 63Mpa, which guarantees reliable operation at ambient temperature of -30 degrees to 55 degrees.