Piston seals are critical components in hydraulic and pneumatic systems that prevent fluid leakage and maintain pressure differentials between piston chambers.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Speed | Up to 1.5 m/s | |
| Hardness | 70-95 Shore A | |
| Clearance Gap | 0.1-0.3 mm (system dependent) | |
| Pressure Range | Up to 500 bar (with appropriate design) | |
| Surface Finish | Cylinder bore: Ra 0.1-0.4 μm, Piston: Ra 0.2-0.8 μm | |
| Temperature Range | -40°C to +200°C (material dependent) |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
A precision mechanical assembly that converts pneumatic or hydraulic pressure into linear motion within a sanitary diaphragm valve actuator.
A precision hydraulic or pneumatic component consisting of a cylinder with a small internal diameter and a matching piston that moves within it to generate or transmit pressure.
A hydraulic actuator component that converts hydraulic pressure into linear mechanical force within an annular preventer.
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Piston seals are installed on the piston and seal between moving piston and stationary cylinder bore, while rod seals are installed in the cylinder head and seal between moving rod and stationary head. Piston seals prevent internal leakage between chambers, while rod seals prevent external leakage.
Replacement intervals depend on operating conditions: typically 1-5 years or 10,000-50,000 operating hours. Signs for replacement include increased internal leakage, pressure drop, fluid contamination, or visible seal damage during inspection.
Yes, but material selection differs. Hydraulic systems typically use NBR, FKM, or PU seals compatible with hydraulic fluids, while pneumatic systems often use NBR, PU, or PTFE seals optimized for air compression and minimal friction.
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