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
APR-90X74.5X6.3-AD1
90.0 mm
74.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0184 kg
CPV-330-J1S
63.5 mm
54.1 mm
7.14 mm
Polyurethane (TPU U-1003)
0.0064 kg
CPV-350-J1S
127.0 mm
117.6 mm
7.14 mm
Polyurethane (TPU U-1003)
0.0135 kg
CPV-429-J1S
139.75 mm
127.71 mm
9.53 mm
Polyurethane (TPU U-1003)
0.0239 kg
CUT 100X84.5X6.3
100.0 mm
84.5 mm
6.3 mm
Polyamide (PA66/011)
0.0158 kg
CUT 125X104X8.1
125.0 mm
104.0 mm
8.1 mm
Polyamide (PA66/011)
0.035 kg
CUT 280X255.5X8.1
280.0 mm
255.5 mm
8.1 mm
Polyamide (PA66/011)
0.103 kg
CUT 320X292X9.5
320.0 mm
292.0 mm
9.5 mm
Polyamide (PA66/011)
0.152 kg
CUT 70X51.7X7
70.0 mm
51.7 mm
7.0 mm
Polyamide (PA66/011)
0.0145 kg
DPV-326-K0M
50.8 mm
41.4 mm
7.14 mm
Polyurethane (X-ECOPUR PS)
0.005 kg
DPV-332-K0M
69.85 mm
60.45 mm
7.14 mm
Polyurethane (X-ECOPUR PS)
0.007 kg
GH 105X89.5X6.3-AD1
105.0 mm
89.5 mm
6.3 mm
Polytetrafluoroethylene (PTFE 292)
0.0274 kg
GH 160X139X8.1-AD1
160.0 mm
139.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.0729 kg
GH 22X14.5X3.2-AD1
22.0 mm
14.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0014 kg
GH 250X229X8.1-AD1
250.0 mm
229.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.128 kg
GH 300X279X8.1-AD1
300.0 mm
279.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.156 kg
GH 310X289X8.1-AD1
310.0 mm
289.0 mm
8.1 mm
Polytetrafluoroethylene (PTFE 292)
0.149 kg
GH 35X27.5X3.2-AD1
35.0 mm
27.5 mm
3.2 mm
Polytetrafluoroethylene (PTFE 292)
0.0022 kg
MD 63X47X18.4-L
63.0 mm
47.0 mm
18.4 mm
Nitrile Rubber (N80/047)
0.036 kg
MD 63X47X20.5-L
63.0 mm
47.0 mm
20.5 mm
Nitrile Rubber (N80/047)
0.0356 kg
MD 70X50X22.4-L
70.0 mm
50.0 mm
22.4 mm
Nitrile Rubber (N80/047)
0.0592 kg
MD 70X54X20.5-L
70.0 mm
54.0 mm
20.5 mm
Nitrile Rubber (N80/047)
0.0394 kg
MPV-105X89.5X6.3
105.0 mm
89.5 mm
6.3 mm
Polyurethane (X-ECOPUR PS)
0.25 kg
MPV-150X129X10.5
150.0 mm
129.0 mm
10.5 mm
Polyurethane (X-ECOPUR PS)
0.1 kg