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
MD 105X80X22.4-L
105.0 mm
80.0 mm
22.4 mm
Nitrile Rubber (N80/047)
0.0113 kg
MD 110X92X22.5-L
110.0 mm
92.0 mm
22.5 mm
Nitrile Rubber (N80/047)
0.05 kg
MD 125X100X25.4-L
125.0 mm
100.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.156 kg
MD 130X105X25.4X9.5-L
130.0 mm
105.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.169 kg
MD 135X110X25.4-L
135.0 mm
110.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.177 kg
MD 140X118X26.5-L
140.0 mm
118.0 mm
26.5 mm
Nitrile Rubber (N80/047)
0.154 kg
MD 150X125X25.4X9.5-L
150.0 mm
125.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.207 kg
MD 160X140X25-L
160.0 mm
140.0 mm
25.0 mm
Nitrile Rubber (N80/047)
0.159 kg
MD 170X140X25.4-L
170.0 mm
140.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.247 kg
MD 200X175X25.4X12.7-L
200.0 mm
175.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.31 kg
CUT 110X89X8.1
110.0 mm
89.0 mm
8.1 mm
Polyamide (PA66/011)
0.0307 kg
CUT 180X159X8.1
180.0 mm
159.0 mm
8.1 mm
Polyamide (PA66/011)
0.054 kg
CUT 250X229X8.1
250.0 mm
229.0 mm
8.1 mm
Polyamide (PA66/011)
0.0699 kg
CUT 50X39X4.2
50.0 mm
39.0 mm
4.2 mm
Polyamide (PA66/011)
0.004 kg
CUT 75X54X8.1
75.0 mm
54.0 mm
8.1 mm
Polyamide (PA66/011)
0.019 kg
CUT 75X59.5X6.3
75.0 mm
59.5 mm
6.3 mm
Polyamide (PA66/011)
0.0123 kg
GH 100X79X8.1-AD1
100.0 mm
79.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.1 kg
GH 160X144.5X6.3-AD1
160.0 mm
144.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.0426 kg
GH 180X159X8.1-AD1
180.0 mm
159.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.084 kg
GH 220X199X8.1-AD1
220.0 mm
199.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.105 kg
GH 28X20.5X3.2-AD1
28.0 mm
20.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0018 kg
GH 30X22.5X3.2-AD1
30.0 mm
22.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0019 kg
GH 32X24.5X3.2-AD1
32.0 mm
24.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0021 kg
GH 75X64X4.2-AD1
75.0 mm
64.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0094 kg