Piston Rod Seals

About Piston Rod Seals

Piston rod seals are mainly made of polytetrafluoroethylene-based materials or polyurethane materials.Specifically designed for hydrodynamic applications, these materials offer excellent abrasion resistance and excellent extrusion resistance. Compatible with virtually all media, Piston rod seals are unrivaled in extreme temperature conditions.

Introduction of piston rod seals

Piston rod seals maintain sealed contact between the hydraulic cylinder head and the reciprocating piston rod. Depending on the application, the rod seal system can consist of a rod seal and a buffer seal or only a rod seal. Rod seal systems for heavy-duty equipment generally consist of a combination of two seals, with a cushion seal positioned between the rod seal and the piston in the cylinder head. The piston rod seal determines the tolerance of the piston rod diameter.

Flanges are arranged on the inner and outer sides of the piston rod seal in the circumferential direction, a retaining ring with a rectangular cross-section is embedded on the upper side of the inner circle on one side of the axial direction, and an O-shaped sealing ring is arranged in the middle of the other side of the axial direction. Using a unique sealing material and geometric shape, it has compact structure, overall stability, wear resistance, good sealing performance, low friction, and has excellent anti-pressure release ability, anti-extrusion and wear resistance.

In addition to their sealing function, rod seals provide a thin film of lubricating oil on the rod for self-lubrication and lubricate the dust seal. Lubricants also prevent corrosion on the piston rod surface. However, the lubricant film must be thin enough to be sealed back into the cylinder on the return stroke.

Features of piston rod seals

1. The piston rod seal is a combined seal, which is prestressed by the O-ring to compensate for the initial state and work.

2. The seal is filled with additives such as graphite, copper powder, and carbon fiber, which can effectively reduce frictional resistance and improve wear resistance.

3. Since the piston rod seal is used in combination, it can avoid contact between metals, significantly improve the supporting capacity, and withstand certain lateral forces.

4. The piston rod seal is resistant to high pressure and allows high linear speed.

5. Small leakage and pump suction function.

To sum up, the piston rod seals has the following advantages: excellent static and dynamic sealing performance, low friction, smooth sliding, even at low speed, dynamic residual oil, good pumping ability, small deformation, excellent Excellent static and dynamic sealing characteristics, additional sealing lip, to a large extent prevent the intrusion of pollutants, low residual oil pumping ability, it is recommended to be used in combination with a one-way dust seal, which can be used as a single independent seal in the sealing system Sealing ring, or used as an auxiliary sealing ring in a sealing system.

Applications of piston rod seals

Piston rod seals are mainly made of polytetrafluoroethylene-based materials or polyurethane materials. Based on its unique sealing material, it has compact structure, overall stability, wear resistance, good sealing performance, low friction, and has excellent anti-pressure release ability, anti-extrusion and wear resistance.

Therefore, piston rod seals are suitable for various industries such as hydraulic pressure, energy, mining, railway and construction industries, and can perfectly solve the conditions of high pressure, high speed and low friction.Even at low speed, the piston rod seal still has good retraction ability, small deformation, smooth sliding, and maintains excellent static and dynamic sealing characteristics.