Rod Seals at NewDealSeals
Rod seals play a vital role in hydraulic systems, ensuring the efficient operation of machinery and equipment. These critical sealing components prevent leakage and maintain hydraulic fluid integrity, contributing to the reliability and performance of various applications. On this page, we’ll delve into the world of rod seals, highlighting their importance, benefits, and diverse applications.
What Are Rod Seals?
Rod seals, also known as hydraulic rod seals, are essential components found in hydraulic cylinders. They are designed to seal the reciprocating motion of the rod in a hydraulic system, preventing hydraulic fluid from escaping while also shielding the system from external contaminants.
Popular Rod Seal Brands
We supply a wide array of hydraulic rod seals, serving as an economical alternative to leading brands like AQ Seal®, Bal Seal®, Double Delta®, and many others. Our hydraulic rod seals provide exceptional performance, ensuring reliable sealing and efficient hydraulic system operation.
Other Brands:
- Flexiseal®
- Glyd Ring®
- MSE®
- Seal, Omniseal®
- Rimseal®
- Stepseal®
- VL Seal®
- Variseal®
- Wynseal®
Technical Specifications
Movement type
Rotary, reciprocating
Working pressure
Standard:≤ 400 bar (≤ 160 bar for profile R3)
In case of reduced extrusion gap (H7/f7) and large cross-sections:≤ 600 bar
Working temperature
Standard:-30 to +108° C
With FKM O-Ring: -25 to +204° C
Surface speed
≤ 4,0 m/s
Standard compounds Rod Seal
NDS-150, PTFE modified. NDS-660, PTFE + 60% bronze
Standard materials O-ring
NBR, FKM
Advantages of Rod Seals:
- Friction Reduction: Rod seals minimize break-out and dynamic slide friction, effectively preventing stick-slip. This ensures steady movement, even at low velocities, guaranteeing the smooth operation of hydraulic systems.
- Low Wear: These seals are designed for longevity, offering low wear characteristics that contribute to the extended life of hydraulic components and equipment.
- Extrusion Resistance: Rod seals exhibit high extrusion resistance, with the ability to withstand the challenging conditions within hydraulic cylinders.
- High Temperature Resistance: Rod seals are engineered to withstand high temperatures, ensuring their reliability in demanding environments where temperature fluctuations are common.
- Chemical Compatibility: The rod sealing ring’s high chemical resistance allows for compatibility with nearly all types of media. This versatility ensures effective sealing in various industrial applications.
- Wide Selection of O-Ring Compounds: Rod seals are available with a wide selection of O-ring compounds, allowing for customization to suit specific sealing needs.
- Large Diameter Options: Rod seals are available in diameters up to 1500 mm, making them suitable for a wide range of hydraulic applications, including large-scale industrial machinery.
Profiles Rod Seals
PROFILE R1
Single acting for hydraulic cylinders
Profile R1 is particularly suitable for rods in control cylinders, servo-assisted equipment, machine tools and quick acting cylinders. An optimal sealing performance is obtained if the sealing set is used in tandem with a double-wiper.
Advantage compared to R2 & R3:
Good back-transport of oil film due to special shape of sealing edge.
PROFILE R2
Double-acting for hydraulic cylinders
Profile R2 is particularly suitable for rods in control cylinders, servo-assisted equipment, machine tools, quick acting cylinders and in construction machinery.
Advantage compared to R1 & R3:
Capable of sealing dynamic pressure from both sides (bidirectional) at high pressure.
PROFILE R3
Double-acting for hydraulic cylinders
Profile R3 is appropriate for dynamic applications as an alternative to an O-ring, for situations where sealing performance and friction have to be optimised.
Advantage compared to R1 & R2:
Can be used in existing O-ring grooves.
PTFE COMPOUNDS
| Color | Temperature | Application | Information | |
|---|---|---|---|---|
| NDS-100 PTFE-virgin |
White | -190 to +230 °C | Chemical Industry, Food Industry | High chemical resistance Datasheet |
| NDS-123 PTFE +15% glass, +5% molybdenum disulfide |
Grey | -190 to +290 °C | Medium-duty | High chemical resistance, High creep resistance, Electrical properties like virgin PTFE Datasheet |
| NDS-225 PTFE +25% carbon |
Black | -190 to +315 °C | Pneumatics Rotary sealing | High wear and creep resistance Datasheet |
| NDS-235 PTFE +10% carbon fibre |
Black | -260 to +310 °C | Water hydraulics, Seawater, Short strokes with high frequency | Very good wear properties Datasheet |
| NDS-430 PTFE + 23% carbon + 2% graphite |
Black | -100 to +250 °C | Medium-duty, cold creep, thermal conductivity | Chemical and wear resistance Datasheet |
| NDS-555 PTFE + mineral fibers |
Antrachite | -200 to +260 °C | Medium and heavy mechanical stress, Hydraulic applications | Chemical, wear and creep resistance Datasheet |
| NDS-640 PTFE +40% bronze |
Bronze | -156 to +260 °C | Medium and heavy mechanical stress, Hydraulic applications |
Outstanding wear and creep resistance
|
| NDS-660 PTFE +60% bronze |
Bronze | -156 to +260 °C | Heavy mechanical stress, Hydraulic applications | Outstanding wear and creep resistance |
| NDS-750 PTFE + polyimide |
Tan | -260 to +310 °C | High speed rotating applications | Use against soft metals |
Related PTFE Seals
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NewDealSeals B.V.
+31 (0) 226 362 233
Boezemschop 8, Breekland, 1724 BJ Oudkarspel, The Netherlands