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 90X110X16
90.0 mm
110.0 mm
16.0 mm
B93
0.0479 kg
STD125-1187-125-J1S
30.15 mm
36.5 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0013 kg
STD125-1500-125-J1S
38.1 mm
44.45 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0015 kg
STD125-1875-125-J1S
47.63 mm
53.98 mm
3.49 mm
Polyurethane (TPU U-1003)
0.0018 kg
S1S-90X105X10
90.0 mm
105.0 mm
10.0 mm
ECOPUR
0.0234 kg
S1S-90X105X12.5
90.0 mm
105.0 mm
12.5 mm
ECOPUR
0.05 kg
S9B-14X21.3X3.2-AD1
14.0 mm
21.3 mm
3.2 mm
Polytetrafluoroethylene (PTFE 741)
0.0011 kg
S9B-45X60.1X6.3-AD1
45.0 mm
60.1 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0131 kg
S9B-70X85.1X6.3-AD1
70.0 mm
85.1 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0195 kg
S9B-90X105.1X6.3-AD1
90.0 mm
105.1 mm
6.3 mm
Polytetrafluoroethylene (PTFE 741)
0.0246 kg
S9B2-1875-AD1
47.63 mm
58.39 mm
4.22 mm
Polytetrafluoroethylene (PTFE 741)
0.0065 kg
S9B3-3750-AD1
95.25 mm
110.9 mm
6.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0254 kg
SIL 110X125X16
110.0 mm
125.0 mm
16.0 mm
B93
0.06 kg
SIL 110X130X13
110.0 mm
130.0 mm
13.0 mm
B93
0.07 kg
SIL 120X130X12.5
120.0 mm
130.0 mm
12.5 mm
B93
0.023 kg
SIL 120X140X13
120.0 mm
140.0 mm
13.0 mm
B93
0.0484 kg
SIL 125X145X13
125.0 mm
145.0 mm
13.0 mm
B93
0.0517 kg
SIL 150X170X13
150.0 mm
170.0 mm
13.0 mm
B93
0.0804 kg
SIL 28X38X9
28.0 mm
38.0 mm
9.0 mm
B93
0.0042 kg
SIL 28X43X12.5
28.0 mm
43.0 mm
12.5 mm
B93
0.01 kg
SIL 30X40X11
30.0 mm
40.0 mm
11.0 mm
B93
0.0055 kg
SIL 30X45X11
30.0 mm
45.0 mm
11.0 mm
B93
0.0093 kg
SIL 32X42X7
32.0 mm
42.0 mm
7.0 mm
B93
0.07 kg
SIL 33X43X11
33.0 mm
43.0 mm
11.0 mm
B93
0.006 kg