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 100X85X20-L
100.0 mm
85.0 mm
20.0 mm
Nitrile Rubber (N80/047)
0.0584 kg
MD 40X30X12.4-L
40.0 mm
30.0 mm
12.4 mm
Nitrile Rubber (N80/047)
0.0102 kg
MD 100X86X22.5-L
100.0 mm
86.0 mm
22.5 mm
Nitrile Rubber (N80/047)
0.0621 kg
MD 110X85X22.4-L
110.0 mm
85.0 mm
22.4 mm
Nitrile Rubber (N80/047)
0.121 kg
MD 110X85X25.4-L
110.0 mm
85.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.135 kg
MD 125X100X32-L
125.0 mm
100.0 mm
32.0 mm
Nitrile Rubber (N80/047)
0.194 kg
MD 125X105X25.4-L
125.0 mm
105.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.128 kg
MD 125X108X26.5-L
125.0 mm
108.0 mm
26.5 mm
Nitrile Rubber (N80/047)
0.11 kg
MD 135X110X25.4X9.5-L
135.0 mm
110.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.188 kg
MD 140X115X25.4-L
140.0 mm
115.0 mm
25.4 mm
Nitrile Rubber (N80/047)
0.181 kg
GH 150X134.5X6.3-AD1
150.0 mm
134.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.0394 kg
LCP4-4500-ND1
114.3 mm
102.11 mm
14.71 mm
Polytetrafluoroethylene (PTFE 741)
0.0478 kg
GH 190X169X8.1-AD1
190.0 mm
169.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.0885 kg
LPV 25X17.5X3.2
25.0 mm
17.5 mm
3.2 mm
Polyurethane (ECOPUR PT 54D)
0.0009 kg
GH 200X179X8.1-AD1
200.0 mm
179.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.0941 kg
LTP-216-E3R
34.93 mm
28.78 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0005 kg
GH 20X12.5X3.2-AD1
20.0 mm
12.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0011 kg
LTP-332-E3R
69.85 mm
60.45 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0075 kg
GH 25X17.5X3.2-AD1
25.0 mm
17.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0015 kg
GH 280X259X8.1-AD1
280.0 mm
259.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.132 kg