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 40X30X12.5-L
40.0 mm
30.0 mm
12.5 mm
Nitrile Rubber (N80/047)
0.0097 kg
MD 45X37X15.5-L
45.0 mm
37.0 mm
15.5 mm
Nitrile Rubber (N80/047)
0.0104 kg
GH 40X29X4.2-AD1
40.0 mm
29.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0045 kg
GH 410X385.5X8.1-AD1
410.0 mm
385.5 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.1 kg
GH 50X34.5X6.3-AD1
50.0 mm
34.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.013 kg
GH 60X49X4.2-AD1
60.0 mm
49.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0074 kg
GH 90X74.5X6.3-AD1
90.0 mm
74.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.0231 kg
GH 90X79X4.2-AD1
90.0 mm
79.0 mm
4.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0115 kg
GH1D-4500-AD1
114.3 mm
104.34 mm
3.28 mm
Polytetrafluoroethylene (PTFE 741)
0.0105 kg
LCP-220X200X16-ND1
220.0 mm
200.0 mm
16.0 mm
Polytetrafluoroethylene (PTFE 741)
0.755 kg
LPV 50X39X4.2
50.0 mm
39.0 mm
4.2 mm
Polyurethane (ECOPUR PT 54D)
0.0035 kg
LPV 60X49X4.2
60.0 mm
49.0 mm
4.2 mm
Polyurethane (ECOPUR PT 54D)
0.0041 kg
LPV 63X52X4.2
63.0 mm
52.0 mm
4.2 mm
Polyurethane (ECOPUR PT 54D)
0.0051 kg
LTP-212-E3R
28.58 mm
22.43 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0145 kg
LTP-222-E3R
44.45 mm
38.3 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0319 kg
LTP-331-E3R
66.68 mm
57.28 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0072 kg
LTP-333-E3R
73.03 mm
63.63 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0081 kg
LTP-335-E3R
79.38 mm
69.98 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0087 kg
LTP-342-E3R
101.6 mm
92.2 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0115 kg
LTP-343-E3R
104.78 mm
95.38 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.012 kg
LTP-344-E3R
107.95 mm
98.55 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0129 kg
LTP-429-E3R
139.75 mm
127.71 mm
9.53 mm
Nitrile Rubber (NBR A-8501)
0.0284 kg
UNP125-1250-250-H9J
38.1 mm
31.75 mm
6.99 mm
Polyurethane (TPU U-1023)
0.0222 kg
UNP250-2000-375-H9J
63.5 mm
50.8 mm
10.48 mm
Polyurethane (TPU U-1023)
0.0112 kg