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
GH1D-2875-AD1
73.03 mm
63.07 mm
3.28 mm
Polytetrafluoroethylene (PTFE 741)
0.0066 kg
GH1D-3000-AD1
76.2 mm
66.24 mm
3.28 mm
Polytetrafluoroethylene (PTFE 741)
0.0069 kg
GH1D-3125-AD1
79.38 mm
69.42 mm
3.28 mm
Polytetrafluoroethylene (PTFE 741)
0.0072 kg
GH1D-3250-AD1
82.55 mm
72.59 mm
3.28 mm
Polytetrafluoroethylene (PTFE 741)
0.0075 kg
GH2A-1562-AD1
39.67 mm
28.91 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0045 kg
GH2A-1812-AD1
46.02 mm
35.26 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0053 kg
GH2A-2250-AD1
57.15 mm
46.38 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0067 kg
GH2A-2375-AD1
60.33 mm
49.56 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0071 kg
GH2A-3125-AD1
79.38 mm
68.61 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0096 kg
GH2A-4375-AD1
111.13 mm
100.36 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0137 kg
GH2A-5000-AD1
127.0 mm
116.23 mm
4.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0157 kg
GH2D-6250-AD1
158.75 mm
145.59 mm
4.04 mm
Polytetrafluoroethylene (PTFE 741)
0.0245 kg
GH2D-6750-AD1
171.45 mm
158.29 mm
4.04 mm
Polytetrafluoroethylene (PTFE 741)
0.0264 kg
GH2D-7250-AD1
184.15 mm
170.99 mm
4.04 mm
Polytetrafluoroethylene (PTFE 741)
0.0285 kg
APR5-12500-AD1
317.5 mm
294.13 mm
9.53 mm
Polytetrafluoroethylene (PTFE 741)
0.177 kg
APR5-13500-AD1
342.9 mm
319.53 mm
9.53 mm
Polytetrafluoroethylene (PTFE 741)
0.19 kg
APR5-14000-AD1
355.6 mm
332.23 mm
9.53 mm
Polytetrafluoroethylene (PTFE 741)
0.197 kg
CPV-437-J1S
165.15 mm
153.11 mm
9.53 mm
Polyurethane (TPU U-1003)
0.03 kg
DPV-338-K0M
88.9 mm
79.5 mm
7.14 mm
Polyurethane (X-ECOPUR PS)
0.009 kg
GH 330X305.5X8.1-AD1
330.0 mm
305.5 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.201 kg
GH0A-1437-AD1
36.5 mm
32.08 mm
2.11 mm
Polytetrafluoroethylene (PTFE 741)
0.0008 kg
GH0A-625-AD1
15.88 mm
11.46 mm
2.11 mm
Polytetrafluoroethylene (PTFE 741)
0.0003 kg
GH0A-750-AD1
19.05 mm
14.63 mm
2.11 mm
Polytetrafluoroethylene (PTFE 741)
0.0004 kg
GH0A-875-AD1
22.23 mm
17.81 mm
2.11 mm
Polytetrafluoroethylene (PTFE 741)
0.0004 kg