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This jack has hollow in the center. Adopted to pre-stressed concrete method such as a nuclear power plant, a tunnel and underground construction and other various applications. | |
 £Å£Ã£±£²£Ó£·¡¥£µ |
72MPa(720kgf/cm2) | |
| EC type Hollow Jack S¡ÊSpring return type) | ||
| 1¡¥Load test is 100% of lifting capacity, lateral load is 1/20 of lifting
capacity. £²¡¥Sliding part of piston is made of copper alloy padding and piston rod is made of hard chromium plating. £³¡¥Cylinder and piston are strong materials heat treated with SCM435. £´¡¥Thread of coupler screw is of NPT3/8. £µ¡¥Valve to prevent load falling is recommended just in case of damage of hose or piping(option item) |
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 £Å£Ã£³£°£È£±£µ |
72MPa(720kgf/cm2) | |
| EC type Hollow Jack H¡ÊHydraulic return type) | ||
| £±¡¥Designed for comapct size, light weight and easy-handling. £²¡¥The hollow going through the rod is used for tensioning such as wire, strand, bolt, rod etc. £³¡¥If Head cap is attached, jack is used as normal one. £´¡¥Sliding part of piston is of copper alloy braze welding and piston rod is welded with hard chrome. £µ¡¥Load test is 100% of lifting capacity, lateral load is 1/20 of lifting capacity. £¶¡¥Material of cylinder and piston is SCM435, heat-treated and reinforrced. £·¡¥Select hydraulic pump according to connecting qty of jacks and following usable oil capacity. £¸¡¥Safety valve which does not make return circuit of jack blockade is supplied as option. |