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
DZ187-2500-375-E2F
63.5 mm
73.0 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.011 kg
DZ187-3000-375-E2F
76.2 mm
85.7 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.013 kg
DZ250-1125-375-E2F
28.58 mm
41.28 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.0085 kg
DZ250-3000-375-E2F
76.2 mm
88.9 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.0201 kg
DZ250-3500-375-E2F
88.9 mm
101.6 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.0232 kg
DZ250-3875-375-E2F
98.43 mm
111.13 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.0255 kg
DZ250-4500-375-E2F
114.3 mm
127.0 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.0294 kg
DZ375-6500-625-E2F
165.1 mm
184.15 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.0947 kg
DZ375-7000-625-E2F
177.8 mm
196.85 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.102 kg
DZR-150X172X16.5-E2D
150.0 mm
172.0 mm
16.5 mm
Polyurethane (TPU U-1003)
0.225 kg
DZR250-4000-375-E2E
101.6 mm
114.3 mm
10.48 mm
Nitrile Rubber (NBR A-8504)
0.0268 kg
PTB-100X115X13.2-J1S
100.0 mm
115.0 mm
13.2 mm
Polyurethane (TPU U-1003)
0.0357 kg
ZBR-105X120X10-E6W
105.0 mm
120.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0298 kg
ZBR-105X125X16.5-E6W
105.0 mm
125.0 mm
16.5 mm
Polyurethane (TPU U-1029)
0.0684 kg
ZBR-125X140X10-E6W
125.0 mm
140.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0292 kg
ZBR-22.4X30X5.7-E6W
22.4 mm
30.0 mm
5.7 mm
Polyurethane (TPU U-1029)
0.0018 kg
ZBR-28X36X6.4-E6W
28.0 mm
36.0 mm
6.4 mm
Polyurethane (TPU U-1029)
0.00246 kg
ZBR-32X40X6.4-E6W
32.0 mm
40.0 mm
6.4 mm
Polyurethane (TPU U-1029)
0.0035 kg
ZBR-45X60X12.5-E6W
45.0 mm
60.0 mm
12.5 mm
Polyurethane (TPU U-1029)
0.0203 kg
ZBR-50X60X11-E6W
50.0 mm
60.0 mm
11.0 mm
Polyurethane (TPU U-1029)
0.0095 kg
ZBR-50X60X8.3-E6W
50.0 mm
60.0 mm
8.3 mm
Polyurethane (TPU U-1029)
0.0083 kg
ZBR-55X65X9-E6W
55.0 mm
65.0 mm
9.0 mm
Polyurethane (TPU U-1029)
0.0088 kg
ZBR-60X75X10-E6W
60.0 mm
75.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0157 kg
ZBR-65X80X10-E6W
65.0 mm
80.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0204 kg