Piston seals

Seals Product Introduction

**Introduction to SKF Hydraulic Seals and Piston Seals: Engineered for Performance and Reliability**

In demanding industrial and mobile hydraulic applications, sealing systems play a critical role in ensuring efficiency, longevity, and contamination control. SKF, a global leader in precision engineering, offers a comprehensive range of **hydraulic seals and piston seals** designed to meet the rigorous demands of heavy machinery, automotive systems, and precision hydraulic equipment. Combining advanced materials, innovative design, and decades of expertise, SKF seals deliver superior leak prevention, reduced friction, and extended service life—even under extreme pressures, temperatures, and dynamic operating conditions.

### **Technical Features and Innovation**
SKF hydraulic seals and piston seals are engineered with cutting-edge technologies to address common challenges such as fluid leakage, wear, and energy loss. Key features include:

– **High-Performance Materials**: SKF utilizes specialized polyurethane (PU), nitrile rubber (NBR), and thermoplastic materials tailored for compatibility with hydraulic fluids, aggressive media, and wide temperature ranges (-40°C to +200°C).
– **Optimized Seal Geometry**: Precision-designed lip profiles and sealing edges ensure minimal friction while maintaining consistent pressure distribution, reducing stick-slip effects and improving responsiveness.
– **Robust Construction**: Reinforced backings and anti-extrusion rings prevent seal deformation under high pressure (up to 500 bar or higher in some applications), even in pulsating or shock-load scenarios.
– **Contamination Resistance**: Integrated wipers and scrapers in rod seal systems protect hydraulic cylinders from particulate ingress, extending component life.

### **Performance Advantages**
SKF seals enhance system performance through:

– **Leak-Free Operation**: Advanced sealing lips and dynamic sealing surfaces minimize fluid loss, maintaining hydraulic efficiency and reducing environmental impact.
– **Durability**: Engineered to withstand abrasive conditions, SKF seals outperform standard seals in lifespan, reducing downtime and maintenance costs.
– **Energy Efficiency**: Low-friction designs lower power consumption in hydraulic systems, contributing to sustainability goals.
– **Versatility**: Suitable for reciprocating, rotary, and static applications across industries.

### **Typical Applications**
SKF hydraulic and piston seals are trusted in critical applications, including:

– **Industrial Machinery**: Hydraulic presses, injection molding machines, and CNC equipment requiring precision motion control.
– **Mobile Hydraulics**: Excavators, loaders, and agricultural machinery operating under variable loads and harsh environments.
– **Automotive Systems**: Brake cylinders, power steering units, and suspension components demanding reliability and safety.
– **Precision Equipment**: Aerospace actuators and medical hydraulic systems where failure is not an option.

By integrating SKF seals into hydraulic systems, engineers and maintenance teams achieve enhanced reliability, reduced total cost of ownership, and compliance with industry standards. Whether for OEM designs or aftermarket replacements, SKF’s sealing solutions represent the forefront of performance-driven engineering.

For more details on material specifications, custom configurations, or application support, explore SKF’s technical resources or consult with their engineering team.

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Designation Cylinder bore diameter Piston groove diameter Piston groove width Primary sealing element Mass
GH 36X28.5X3.2-AD1
36.0 mm
28.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.002 kg
GH 40X32.5X3.2-AD1
40.0 mm
32.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0028 kg
GH 45X37.5X3.2-AD1
45.0 mm
37.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0028 kg
GH 70X59X4.2-AD1
70.0 mm
59.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0088 kg
GH 85X69.5X6.3-AD1
85.0 mm
69.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.0215 kg
GH 95X79.5X6.3-AD1
95.0 mm
79.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.025 kg
GH1D-2000-AD1
50.8 mm
40.84 mm
3.28 mm
Polytetrafluoroethylene (PTFE 741)
0.0045 kg
GH3A-4000-AD1
101.6 mm
85.95 mm
6.32 mm
Polytetrafluoroethylene (PTFE 741)
0.0259 kg
LCP-100X85X12.5-ND1
100.0 mm
85.0 mm
12.5 mm
Polytetrafluoroethylene (PTFE 741)
0.108 kg
LCP4-3000-ND1
76.2 mm
64.01 mm
14.71 mm
Polytetrafluoroethylene (PTFE 741)
0.0784 kg
LCP4-4500-ND1
114.3 mm
102.11 mm
14.71 mm
Polytetrafluoroethylene (PTFE 741)
0.0478 kg
LPV 25X17.5X3.2
25.0 mm
17.5 mm
3.2 mm
Polyurethane (ECOPUR PT 54D)
0.0009 kg
LTP-216-E3R
34.93 mm
28.78 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0005 kg
LTP-332-E3R
69.85 mm
60.45 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0075 kg
APR-100X84.5X6.3-AD1
100.0 mm
84.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0207 kg
APR-50X39X4.2-AD1
50.0 mm
39.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 741)
0.0049 kg
APR-60X49X4.2-AD1
60.0 mm
49.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 741)
0.0061 kg
APR-80X69X4.2-AD1
80.0 mm
69.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 741)
0.0084 kg
APR2-1750-AD1
44.45 mm
33.68 mm
5.33 mm
Polytetrafluoroethylene (PTFE 741)
0.0054 kg
CPV-328-J1S
57.15 mm
47.75 mm
7.14 mm
Polyurethane (TPU U-1003)
0.0057 kg
CUT 160X139X8.1
160.0 mm
139.0 mm
8.1 mm
Polyamide (PA66/011)
0.0465 kg
CUT 165X144X8.1
165.0 mm
144.0 mm
8.1 mm
Polyamide (PA66/011)
0.045 kg
CUT 175X154X8.1
175.0 mm
154.0 mm
8.1 mm
Polyamide (PA66/011)
0.05 kg
CUT 210X189X8.1
210.0 mm
189.0 mm
8.1 mm
Polyamide (PA66/011)
0.063 kg