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 80X64.5X6.3-AD1
80.0 mm
64.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.0204 kg
CUT 40X29X4.2
40.0 mm
29.0 mm
4.2 mm
Polyamide (PA66/011)
0.003 kg
GH 80X69X4.2-AD1
80.0 mm
69.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.01 kg
DPV-222-K0M
44.45 mm
38.3 mm
4.75 mm
Polyurethane (X-ECOPUR PS)
0.002 kg
GH 85X74X4.2-AD1
85.0 mm
74.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0081 kg
DPV-334-K0M
76.2 mm
66.8 mm
7.14 mm
Polyurethane (X-ECOPUR PS)
0.008 kg
GH3A-3500-AD1
88.9 mm
73.25 mm
6.32 mm
Polytetrafluoroethylene (PTFE 741)
0.0224 kg
GH 100X84.5X6.3-AD1
100.0 mm
84.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.026 kg
GH 125X104X8.1-AD1
125.0 mm
104.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.0555 kg
GH 125X109.5X6.3-AD1
125.0 mm
109.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.033 kg
GH 130X109X8.1-AD1
130.0 mm
109.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.0584 kg
GH 150X129X8.1-AD1
150.0 mm
129.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.07 kg
GH 170X149X8.1-AD1
170.0 mm
149.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.0794 kg
GH 20X15.1X2.2-AD1
20.0 mm
15.1 mm
2.2 mm
Polytetrafluoroethylene (PTFE 292)
0.1 kg
CUT 150X129X8.1
150.0 mm
129.0 mm
8.1 mm
Polyamide (PA66/011)
0.0443 kg
UNP-63X53X7-E6W
63.0 mm
53.0 mm
7.0 mm
Polyurethane (TPU U-1029)
0.0056 kg
CUT 200X179X8.1
200.0 mm
179.0 mm
8.1 mm
Polyamide (PA66/011)
0.0562 kg
UNP250-3000-375-H9J
88.9 mm
76.2 mm
10.48 mm
Polyurethane (TPU U-1023)
0.0157 kg
CUT 220X199X8.1
220.0 mm
199.0 mm
8.1 mm
Polyamide (PA66/011)
0.0674 kg
APR-63X52X4.2-AD1
63.0 mm
52.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 741)
0.0064 kg
CUT 230X209X8.1
230.0 mm
209.0 mm
8.1 mm
Polyamide (PA66/011)
0.0685 kg
APR3-3000-AD1
76.2 mm
60.55 mm
7.32 mm
Polytetrafluoroethylene (PTFE 741)
0.0096 kg
CUT 240X219X8.1
240.0 mm
219.0 mm
8.1 mm
Polyamide (PA66/011)
0.0745 kg
CPV-326-J1S
50.8 mm
41.4 mm
7.14 mm
Polyurethane (TPU U-1003)
0.0047 kg