Designed according to the work conditions at sea, the cylinder caneffectively avoid the pollution caused by sea water. The seal parts adopt products of famous brands like Parker, NOK, Merkel, and Trelleborg. The outer leakage problem are thoroughly solved and there is hardly inter leakage, which ensures the optimum oil membrane at the piston rod and prolongs the service life of seal parts.
a?? Piston Rod
The piston rod is made of high strength carbon steel with precision grinding treatment. With the design concept of improving the rod strength and the high performance heat treatment, hard chrome and nickel plating and CNC tumbling, the even veins and high degree of finish of the surface is guaranteed, and it has good oil membrane at the surface, which improves the service life of the seal parts. And the following is the common methods of piston rod:
1) chrome plating or chrome and nickel plating at the piston rod;
2) Weld stainless steel sleeve at the end of piston rod (sleeve material: SUS316);
3) Stainless steel piston rod.
a?? Guide sleeve
Due to the reasonable collocation of guide sleeve and support length and the high bearing capacity support ring of Phenol-formaldehyde material, it can eliminate the contact between the piston rod and guide sleeve and avoid the cementation and pull probles. At the same time it improves the side bearing capacity, impact absorption, and prolongs the service life of the cylinder.
a?? Cylinder block
The cylinder block is made of high strength carbon steel. It has good degree of finish and rigidity under the cold pressing and tumbling treatment which reduces the surface friction, improves the wear resistance and prolongs the service life of seal parts.
a?? Piston and piston seals
The piston is of one-piece steel structure, and it is connected at the piston rod with the thread. The piston seals adopt Parker ZW or Merkel L43 double-acting piston seals, which can achieve the guide and seal function at the same time. The special shape of seal parts can ensure that there is no twist during the installation, and the seal material is acrylonitrile-butadiene rubber which has good seal capability and it can achieve zero leakage as much as possible.
a?? Welding
The robot welding can effectively avoid the unstable factors due to manual welding. With supersonic fault localization inspection performed by professionals, the welding defect can be avoided.
a?? Surface treatment
The cylinder surface is sandblasted 2.5 accord