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
ZBR375-6500-625-E6W
165.1 mm
184.15 mm
17.46 mm
Polyurethane (TPU U-1029)
0.0932 kg
DZ125-750-250-E2F
19.05 mm
25.4 mm
6.99 mm
Nitrile Rubber (NBR A-8504)
0.0016 kg
DZ187-3250-312-E2F
82.55 mm
92.05 mm
8.72 mm
Nitrile Rubber (NBR A-8504)
0.0119 kg
DZ250-3750-562-E2F
95.25 mm
107.95 mm
15.7 mm
Nitrile Rubber (NBR A-8504)
0.035 kg
DZ312-2500-500-E2F
63.5 mm
79.35 mm
13.97 mm
Nitrile Rubber (NBR A-8504)
0.0259 kg
DZ312-3750-500-E2F
95.25 mm
111.1 mm
13.97 mm
Nitrile Rubber (NBR A-8504)
0.0407 kg
DZ375-14000-625-E2F
355.6 mm
374.65 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.208 kg
DZ375-1750-750-E2F
44.45 mm
63.5 mm
20.96 mm
Nitrile Rubber (NBR A-8504)
0.0344 kg
DZ375-3000-625-E2F
76.2 mm
95.25 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.0465 kg
DZ375-4000-625-E2F
101.6 mm
120.65 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.0603 kg
DZ375-4000-750-E2F
101.6 mm
120.65 mm
20.96 mm
Nitrile Rubber (NBR A-8504)
0.0708 kg
DZ375-6000-625-E2F
152.4 mm
171.45 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.0878 kg
DZ375-7500-625-E2F
190.5 mm
209.55 mm
17.46 mm
Nitrile Rubber (NBR A-8504)
0.109 kg
STD625-5750-625-J1S
146.05 mm
177.8 mm
17.46 mm
Polyurethane (TPU U-1003)
0.147 kg
STD625-7750-625-J1S
196.85 mm
228.6 mm
17.46 mm
Polyurethane (TPU U-1003)
0.193 kg
STD750-14000-750-J1S
355.6 mm
393.7 mm
20.96 mm
Polyurethane (TPU U-1003)
0.503 kg
STD750-7500-750-J1S
190.5 mm
228.6 mm
20.96 mm
Polyurethane (TPU U-1003)
0.282 kg
STD750-9000-750-J1S
228.6 mm
266.7 mm
20.96 mm
Polyurethane (TPU U-1003)
0.333 kg
ZBR-112X125X10-E6W
112.0 mm
125.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0238 kg
ZBR-115X130X10-E6W
115.0 mm
130.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0296 kg
ZBR-130X150X17.5-E6W
130.0 mm
150.0 mm
17.5 mm
Polyurethane (TPU U-1029)
0.0662 kg
ZBR-136X150X10-E6W
136.0 mm
150.0 mm
10.0 mm
Polyurethane (TPU U-1029)
0.0341 kg
ZBR-190X210X16.5-E6W
190.0 mm
210.0 mm
16.5 mm
Polyurethane (TPU U-1029)
0.09 kg
ZBR-255X280X20.5-E6W
255.0 mm
280.0 mm
20.5 mm
Polyurethane (TPU U-1029)
0.223 kg