707-99-35351 7079935351 Komatsu Arm Cylinder Seal Kit For PC60-8 Arm Cylinder Repair Kit

707-99-35351 7079935351 Komatsu Arm Cylinder Seal Kit For PC60-8 Arm Cylinder Repair Kit

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Types and uses of sealing materials:

The sealing material should meet the requirements of sealing function. Due to the different media to be sealed and the different working conditions of the equipment, different adaptability of the sealing material is required. The requirements for sealing materials are generally:

1.The material has good compactness and is not easy to leak the medium;

2.have appropriate mechanical strength and hardness;

3.Good compressibility and resilience, and small permanent deformation;

4.No softening or decomposition at high temperature, no hardening or brittle cracking at low temperature;

5.Good corrosion resistance, can work for a long time in acid, alkali, oil and other media, its volume and hardness change is small, and it does not adhere to the metal surface;

6.Small friction coefficient and good wear resistance;

7.It has the flexibility to combine with the sealing surface;

8.Good aging resistance and durability;

9.It is convenient to manufacture, cheap and easy to obtain.

Rubber is the most commonly used sealing material. In addition to rubber, graphite, polytetrafluoroethylene and various sealants are suitable for sealing materials.

Small knowledge of sealing:

Leakage is one of the common failures of mechanical equipment. There are two main reasons for the leakage:

(1) As a result of mechanical processing, there must be various defects and shape and size deviations on the surface of mechanical products, so gaps will inevitably occur at the joints of mechanical parts;

(2) There is a pressure difference on both sides of the seal, and the working medium will leak through the gap.

Reducing or eliminating gaps is the main way to prevent leaks. The function of sealing is to seal the gap between the joint surfaces, isolate or cut off the leakage channel, increase the resistance in the leakage channel, or add a small working element in the channel to cause pressure on the leakage, and partially offset the pressure difference causing the leakage. Or fully balanced to stop leaks.