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
SIL 25X33X7
25.0 mm
33.0 mm
7.0 mm
B93
0.0021 kg
SIL 25X35X11
25.0 mm
35.0 mm
11.0 mm
B93
0.0045 kg
SIL 25X35X9
25.0 mm
35.0 mm
9.0 mm
B93
0.0038 kg
SIL 30X38X6.3
30.0 mm
38.0 mm
6.3 mm
B93
0.0023 kg
SIL 32X40X6.3
32.0 mm
40.0 mm
6.3 mm
B93
0.0026 kg
SIL 35X43X6.3
35.0 mm
43.0 mm
6.3 mm
B93
0.003 kg
SIL 35X45X7
35.0 mm
45.0 mm
7.0 mm
B93
0.06 kg
SIL 36X51X12.5
36.0 mm
51.0 mm
12.5 mm
B93
0.012 kg
RSB3-4500-AD2
114.3 mm
129.95 mm
6.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0876 kg
S1S-100X120X16
100.0 mm
120.0 mm
16.0 mm
ECOPUR
0.06 kg
S1S-110X125X11
110.0 mm
125.0 mm
11.0 mm
ECOPUR
0.033 kg
S1S-110X130X16
110.0 mm
130.0 mm
16.0 mm
ECOPUR
0.065 kg
S1S-120X135X10
120.0 mm
135.0 mm
10.0 mm
ECOPUR
0.032 kg
S1S-120X140X13
120.0 mm
140.0 mm
13.0 mm
ECOPUR
0.057 kg
S1S-180X200X14
180.0 mm
200.0 mm
14.0 mm
ECOPUR
0.0852 kg
S1S-180X205X20
180.0 mm
205.0 mm
20.0 mm
ECOPUR
0.163 kg
S1S-200X220X14
200.0 mm
220.0 mm
14.0 mm
ECOPUR
0.0942 kg
S1S-20X28X6.3
20.0 mm
28.0 mm
6.3 mm
ECOPUR
0.0019 kg
S1S-25X33X6
25.0 mm
33.0 mm
6.0 mm
ECOPUR
0.0023 kg
S1S-25X35X8
25.0 mm
35.0 mm
8.0 mm
ECOPUR
0.0038 kg
S1S-30X40X11
30.0 mm
40.0 mm
11.0 mm
ECOPUR
0.3 kg
S1S-55X70X10
55.0 mm
70.0 mm
10.0 mm
ECOPUR
0.014 kg
S1S-60X73X11
60.0 mm
73.0 mm
11.0 mm
ECOPUR
0.0161 kg
S1S-60X80X13
60.0 mm
80.0 mm
13.0 mm
ECOPUR
0.031 kg