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
PTB625-11500-1000-J1S
292.1 mm
323.85 mm
27.94 mm
Polyurethane (TPU U-1003)
0.432 kg
RBB-115X130.1X6.3-J0S
115.0 mm
130.1 mm
6.3 mm
Polyurethane (TPU U-1029)
0.0045 kg
RBB-150X165.1X6.3-J0S
150.0 mm
165.1 mm
6.3 mm
Polyurethane (TPU U-1029)
0.0056 kg
RBB-60X75.5X6.3-J0S
60.0 mm
75.5 mm
6.3 mm
Polyurethane (TPU U-1029)
0.009 kg
RBB-65X80.1X6.3-J0S
65.0 mm
80.1 mm
6.3 mm
Polyurethane (TPU U-1029)
0.0096 kg
PTB375-7000-625-J1S
177.8 mm
196.85 mm
17.46 mm
Polyurethane (TPU U-1003)
0.0995 kg
RBB-85X100.1X6.3-J0S
85.0 mm
100.1 mm
6.3 mm
Polyurethane (TPU U-1029)
0.0119 kg
PTB375-8750-500-J1S
222.25 mm
241.3 mm
13.97 mm
Polyurethane (TPU U-1003)
0.0986 kg
RSB2-1500-AD2
38.1 mm
48.87 mm
4.22 mm
Polytetrafluoroethylene (PTFE 741)
0.0153 kg
PTB437-3875-750-J1S
98.43 mm
120.62 mm
20.96 mm
Polyurethane (TPU U-1003)
0.0809 kg
RSB3-3500-AD2
88.9 mm
104.55 mm
6.27 mm
Polytetrafluoroethylene (PTFE 741)
0.0958 kg
PTB500-12000-750-J1S
304.8 mm
330.2 mm
20.96 mm
Polyurethane (TPU U-1003)
0.27 kg
RSB3-5250-AD2
133.35 mm
149.0 mm
6.27 mm
Polytetrafluoroethylene (PTFE 741)
0.153 kg
PTB500-12750-750-J1S
323.85 mm
349.25 mm
20.96 mm
Polyurethane (TPU U-1003)
0.287 kg
PTB500-18000-750-J1S
457.2 mm
482.6 mm
20.96 mm
Polyurethane (TPU U-1003)
0.4 kg
PTB500-19000-750-J1S
482.6 mm
508.0 mm
20.96 mm
Polyurethane (TPU U-1003)
0.422 kg
PTB375-2000-500-J1S
50.8 mm
69.85 mm
13.97 mm
Polyurethane (TPU U-1003)
0.0737 kg
PTB375-2250-625-J1S
57.15 mm
76.2 mm
17.46 mm
Polyurethane (TPU U-1003)
0.0883 kg
PTB375-2500-500-J1S
63.5 mm
82.55 mm
13.97 mm
Polyurethane (TPU U-1003)
0.0889 kg
PTB375-2750-500-J1S
69.85 mm
88.9 mm
13.97 mm
Polyurethane (TPU U-1003)
0.0965 kg
PTB375-3250-625-J1S
82.55 mm
101.6 mm
17.46 mm
Polyurethane (TPU U-1003)
0.0489 kg
PTB312-2000-375-J1S
50.8 mm
66.65 mm
10.48 mm
Polyurethane (TPU U-1003)
0.0155 kg
PTB375-3750-625-J1S
95.25 mm
114.3 mm
17.46 mm
Polyurethane (TPU U-1003)
0.138 kg
PTB312-2375-500-J1S
60.33 mm
76.17 mm
13.97 mm
Polyurethane (TPU U-1003)
0.024 kg