5J5402 TPU Seal Kits of Hydraulic Pump Piston Rod 5J4987 

1. Rod seals
The rod seals is the most critical seal on any type of fluid power equipment preventing leakage of fluid from within the cylinder to the outsise. Leakage through the rod seal can reduce equipment performance, and also in extreme cases can cause environmental issue

2. Piston Seals
Piston seals or piston rings are used in hydraulic cylinders for fluid sealing and are designed to ensure that pressurised fluid does not leak across the cylinder head as the system pressure pushes the piston down the cyliner bore.

3. Rod & Piston Seals
Rod & Piston seals are equal lip-seal which can be used for both piston seal and rod seal. they're also the most critical seals on any type of fluid power equipment preventing leakage of fluid from within the cylinder to the outside. Leakage through the rod or piston seal can reduct equipment performance, and also in extreme cases can cause environmental issues.

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