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Hollow hydraulic ram jack is connected with all the design features of single acting hydraulic jack and design superiority of double acting hydraulic jack, increase its operation and working speed, especially, it can make the best of its hydraulic force in the long stroke engineering. Our hydraulic jacks have been widely used for industrial field, such as steel plant, cement industry, chemical and refinery, bridge, railway, highway, hydropower station, ship repair, building,construction and maintenance.
This type of hydraulic ram cylinder have central in the piston, it is widely used for nuclear power plant, tunnel engineering, foundation and other the similar projects. And it can be connected with prestressed craft, it is also used for post tension prestressed bridge project.
The surface of principle axis is finished with chrome plate to protect the using of longeity of the product. Principle axis has the function of retracting automatically. Surface coating resists corrosion,extending cylinder life. Hardy underlay to avoid axis break when it is overloading.
Hollow hydraulic ram jack provide versatility in testing, maintenance and tensioning applications. The hollow plunger design allows for both pull and push forces,Single-acting spring return, Jacks are nickel-plated, floating center tube on models over 20 tons increases product life. Baked enamel finish for increased corrosion resistance. Collar threads for easy fixturing.
In addition to the characteristics of common hydro-cylinder, the hollow hydraulic ram jack has a through hole in the middle to extend the application scope. The product is small in volume, light in weight, large in tonnage, compact in structure, simple in operation, low in flow rate under ultra high pressure, and can be equipped with high and low pressure pump to improve working efficiency. The top of the hydraulic ram cylinder is equipped with a dust-proof ring. The top and plunger have a guide sleeve, which can absorb the offset force to prolong the service life of the cylinder.
The hollow hydraulic ram jack produced by the company, especially in large-scale projects, is easy-to-operate control and hydraulic jack. It is designed with safety pressure-preserving device and built-in pressure relief valve to prevent overload to protect the jack for safe operation. The connection of the device is a high pressure hose and a threaded joint. It has the advantages of quick use and overcoming the shortcomings of rapid traditional joint oil leakage. It is mainly used for the installation and disassembly of equipment in electric power, construction, machinery manufacturing, mining, railway bridges, shipbuilding and other industries.
Hollow jack is a kind of light and small lifting equipment which uses the rigid lifting parts as the working device to lift the heavy objects in a small distance through the top bracket or the bottom bracket. Hydraulic Jack must cooperate with manual hydraulic pump or electric hydraulic pump before it can be used.
