Rod and buffer seals

Seals Product Introduction

**Introduction to SKF Hydraulic Seals: Rod and Buffer Seals for Demanding Industrial Applications**

In hydraulic systems, maintaining optimal performance and reliability depends on the integrity of sealing solutions. SKF, a global leader in precision engineering, offers a comprehensive range of **hydraulic seals**, including specialized **rod seals** and **buffer seals**, designed to withstand extreme pressures, dynamic motion, and harsh operating conditions. These seals play a critical role in preventing fluid leakage, minimizing friction, and extending the service life of hydraulic cylinders and other industrial machinery.

### **Technical Features and Design Excellence**
SKF hydraulic rod and buffer seals are engineered with advanced materials and innovative geometries to deliver superior sealing performance. Key features include:

– **High-Pressure Resistance**: Constructed from durable polyurethane (PU) or thermoplastic materials, SKF rod seals are optimized to handle high-pressure cycles (up to 40 MPa or more) without extrusion or premature wear.
– **Low Friction and Energy Efficiency**: Precision-machined sealing lips reduce friction, ensuring smooth rod movement and improving energy efficiency in hydraulic systems.
– **Enhanced Contamination Resistance**: Integrated wiper designs in buffer seals prevent dirt, moisture, and particulate ingress, protecting critical hydraulic components from damage.
– **Temperature and Chemical Compatibility**: SKF seals perform reliably across a wide temperature range (-30°C to +110°C) and resist degradation from hydraulic fluids, oils, and aggressive media.

### **Performance Advantages for Industrial Applications**
SKF hydraulic seals are trusted in industries where reliability and durability are non-negotiable. Their benefits include:

– **Extended Service Life**: Reduced wear and tear due to optimized material compounds and dynamic sealing profiles.
– **Leakage Prevention**: Tight sealing action maintains system pressure, reducing downtime and maintenance costs.
– **Shock Absorption (Buffer Seals)**: In high-pressure applications, buffer seals act as secondary protection, absorbing pressure spikes and preventing primary seal failure.

### **Typical Applications**
SKF rod and buffer seals are widely used in:

– **Industrial Machinery**: Hydraulic presses, injection molding machines, and construction equipment (e.g., excavators, loaders).
– **Automotive Systems**: Suspension cylinders, braking systems, and heavy-duty truck hydraulics.
– **Precision Equipment**: Aerospace actuators, marine hydraulic systems, and robotic automation.

By combining cutting-edge materials, rigorous testing, and application-specific designs, SKF hydraulic seals ensure **long-term reliability**, **efficiency**, and **cost savings** for demanding industrial environments. Whether in mobile hydraulics or stationary machinery, SKF’s sealing solutions help operators achieve peak performance while minimizing environmental impact through reduced fluid leakage.

For engineers and maintenance professionals seeking high-performance sealing solutions, SKF’s rod and buffer seals represent a proven choice for enhancing hydraulic system longevity and operational efficiency.

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Designation Rod diameter Housing groove diameter Housing groove width Primary sealing element Mass
S1S-60X70X9
60.0 mm
70.0 mm
9.0 mm
ECOPUR
0.01 kg
S1S-60X75X10
60.0 mm
75.0 mm
10.0 mm
ECOPUR
0.0172 kg
S1S-63X78X10
63.0 mm
78.0 mm
10.0 mm
ECOPUR
0.016 kg
S1S-65X78X11
65.0 mm
78.0 mm
11.0 mm
ECOPUR
0.0173 kg
S1S-65X80X10
65.0 mm
80.0 mm
10.0 mm
ECOPUR
0.02 kg
S1S-70X83X11
70.0 mm
83.0 mm
11.0 mm
ECOPUR
0.0186 kg
S1S-70X85X10
70.0 mm
85.0 mm
10.0 mm
ECOPUR
0.022 kg
S1S-80X93X11
80.0 mm
93.0 mm
11.0 mm
ECOPUR
0.021 kg
S1S-80X95X12.4
80.0 mm
95.0 mm
12.4 mm
ECOPUR
0.026 kg
S1S-95X115X13
95.0 mm
115.0 mm
13.0 mm
ECOPUR
0.0463 kg
S9B-80X95.1X6.3-AD1
80.0 mm
95.1 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0221 kg
S9B2-2500-AD1
63.5 mm
74.27 mm
4.22 mm
Polytetrafluoroethylene (PTFE 741)
0.0086 kg
SIL 110X125X10
110.0 mm
125.0 mm
10.0 mm
B93
0.05 kg
SIL 110X130X16
110.0 mm
130.0 mm
16.0 mm
B93
0.0588 kg
SIL 125X145X16
125.0 mm
145.0 mm
16.0 mm
B93
0.063 kg
SIL 130X150X16
130.0 mm
150.0 mm
16.0 mm
B93
0.0655 kg
PTB500-5500-625-J1S
139.7 mm
165.1 mm
17.46 mm
Polyurethane (TPU U-1003)
0.108 kg
PTB500-7250-750-J1S
184.15 mm
209.55 mm
20.96 mm
Polyurethane (TPU U-1003)
0.168 kg
PTB500-8000-750-J1S
203.2 mm
228.6 mm
20.96 mm
Polyurethane (TPU U-1003)
0.184 kg
PTB500-8500-750-J1S
215.9 mm
241.3 mm
20.96 mm
Polyurethane (TPU U-1003)
0.195 kg
PTB500-9750-750-J1S
247.65 mm
273.05 mm
20.96 mm
Polyurethane (TPU U-1003)
0.222 kg
PTB750-22500-1000-J1S
571.5 mm
609.6 mm
27.94 mm
Polyurethane (TPU U-1003)
0.868 kg
PTB750-8000-1250-J1S
203.2 mm
241.3 mm
34.93 mm
Polyurethane (TPU U-1003)
0.477 kg
PTB750-9000-1250-J1S
228.6 mm
266.7 mm
34.93 mm
Polyurethane (TPU U-1003)
0.532 kg