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-160X180X16
160.0 mm
180.0 mm
16.0 mm
ECOPUR
0.0872 kg
S1S-240X260X16
240.0 mm
260.0 mm
16.0 mm
ECOPUR
0.128 kg
S1S-28X38X8
28.0 mm
38.0 mm
8.0 mm
ECOPUR
0.0038 kg
S1S-45X55X8
45.0 mm
55.0 mm
8.0 mm
ECOPUR
0.0063 kg
S1S-50X60X7
50.0 mm
60.0 mm
7.0 mm
ECOPUR
0.007 kg
S1S-55X65X9
55.0 mm
65.0 mm
9.0 mm
ECOPUR
0.009 kg
S1S-60X75X12.5
60.0 mm
75.0 mm
12.5 mm
ECOPUR
0.2 kg
S1S-65X75X7
65.0 mm
75.0 mm
7.0 mm
ECOPUR
0.0083 kg
S1S-70X85X11
70.0 mm
85.0 mm
11.0 mm
ECOPUR
0.022 kg
S1S-70X85X12.5
70.0 mm
85.0 mm
12.5 mm
ECOPUR
0.2 kg
S1S-75X85X12.4
75.0 mm
85.0 mm
12.4 mm
ECOPUR
0.0159 kg
S1S-75X90X10
75.0 mm
90.0 mm
10.0 mm
ECOPUR
0.023 kg
S1S-80X95X11
80.0 mm
95.0 mm
11.0 mm
ECOPUR
0.024 kg
S1S-90X105X11
90.0 mm
105.0 mm
11.0 mm
ECOPUR
0.027 kg
S1S-95X110X10
95.0 mm
110.0 mm
10.0 mm
ECOPUR
0.029 kg
S9B1-1000-AD1
25.4 mm
32.97 mm
3.2 mm
Polytetrafluoroethylene (PTFE 741)
0.0017 kg
S9B3-8000-AD1
203.2 mm
218.85 mm
6.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0529 kg
SIL 100X110X12.5
100.0 mm
110.0 mm
12.5 mm
B93
0.0188 kg
SIL 100X120X13
100.0 mm
120.0 mm
13.0 mm
B93
0.0422 kg
SIL 105X115X12.5
105.0 mm
115.0 mm
12.5 mm
B93
0.0195 kg
PTB375-6000-625-J1S
152.4 mm
171.45 mm
17.46 mm
Polyurethane (TPU U-1003)
0.086 kg
PTB500-11000-750-J1S
279.4 mm
304.8 mm
20.96 mm
Polyurethane (TPU U-1003)
0.249 kg
PTB500-4500-750-J1S
114.3 mm
139.7 mm
20.96 mm
Polyurethane (TPU U-1003)
0.0947 kg
PTB500-5375-750-J1S
136.53 mm
161.93 mm
20.96 mm
Polyurethane (TPU U-1003)
0.127 kg