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
MPV-160X139X8.1
160.0 mm
139.0 mm
8.1 mm
Polyurethane (X-ECOPUR PS)
0.0456 kg
MPV-180X159X8.1
180.0 mm
159.0 mm
8.1 mm
Polyurethane (X-ECOPUR PS)
0.1 kg
MPV-200X179X8.1
200.0 mm
179.0 mm
8.1 mm
Polyurethane (X-ECOPUR PS)
0.01 kg
MPV-50X34.5X6.3
50.0 mm
34.5 mm
6.3 mm
Polyurethane (X-ECOPUR PS)
0.0072 kg
MPV-55X39.5X6.3
55.0 mm
39.5 mm
6.3 mm
Polyurethane (X-ECOPUR PS)
0.0081 kg
MPV-60X44.5X6.3
60.0 mm
44.5 mm
6.3 mm
Polyurethane (X-ECOPUR PS)
0.0089 kg
MPV-70X59X4.2
70.0 mm
59.0 mm
4.2 mm
Polyurethane (X-ECOPUR PS)
0.01 kg
SCP2-4000-E5E
101.6 mm
87.43 mm
7.16 mm
Polyamide (PA P-2501)
0.018 kg
SCP2-4025-E5D
102.24 mm
88.06 mm
7.16 mm
Polyamide (PA P-2551)
0.0358 kg
SCP2-4500-E5D
114.3 mm
100.13 mm
7.16 mm
Polyamide (PA P-2551)
0.0359 kg
SCP4-9500-E5D
241.3 mm
219.05 mm
9.58 mm
Polyamide (PA P-2551)
0.0761 kg
SCP5-2500-E5E
63.5 mm
48.46 mm
7.92 mm
Polyamide (PA P-2501)
0.006 kg
UNP-170X150X13-E6W
170.0 mm
150.0 mm
13.2 mm
Polyurethane (TPU U-1029)
0.0688 kg
UNP-170X155X10-E6W
170.0 mm
155.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0352 kg
LTP-206-E3R
19.05 mm
12.9 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0061 kg
LTP-208-E3R
22.23 mm
16.08 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0005 kg
LTP-218-E3R
38.1 mm
31.95 mm
4.75 mm
Nitrile Rubber (NBR A-8501)
0.0005 kg
LTP-336-E3R
82.55 mm
73.15 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0097 kg
LTP-340-E3R
95.25 mm
85.85 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0106 kg
LTP-346-E3R
114.3 mm
104.9 mm
7.14 mm
Nitrile Rubber (NBR A-8501)
0.0134 kg
LTP-427-E3R
133.4 mm
121.36 mm
9.53 mm
Nitrile Rubber (NBR A-8501)
0.0649 kg
MD 105X92.5X14-L
105.0 mm
92.5 mm
14.0 mm
Nitrile Rubber (N80/047)
0.0465 kg
MD 115X90X22.4-L
115.0 mm
90.0 mm
22.4 mm
Nitrile Rubber (N80/047)
0.128 kg
MD 115X97X22.5-L
115.0 mm
97.0 mm
22.5 mm
Nitrile Rubber (N80/047)
0.0831 kg