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Fluoro-polymers
PTFE Step Seal For Hydraulic
Product Overview
KAFLON® PTFE Step Seals for Hydraulic Systems are engineered to provide superior sealing performance in high-pressure hydraulic applications. These seals are designed with a unique step profile, optimized to create a reliable seal between the dynamic piston and cylinder wall while ensuring minimal friction and extended service life.
Key Features & Benefits
Step Profile Design
The step seal design reduces friction while maintaining a high sealing force, ensuring consistent performance over a wide range of pressures
Excellent Wear Resistance
PTFE-filled compounds are highly resistant to wear and tear, extending seal life even in demanding hydraulic environments
Low Friction Performance
Designed to minimize friction, these seals reduce energy consumption and wear on hydraulic components.
Wide Chemical Compatibility
Resistant to a wide range of chemicals, oils, and hydraulic fluids, PTFE step seals perform reliably in harsh working conditions.
Thermal Stability
Excellent performance in temperature ranges from –50°C to +250°C (depending on compound grade).
Low Leakage Risk
The step profile creates a reliable, stable seal, reducing the potential for leakage and improving system efficiency.
Typical Material Properties
| Property | PTFE Step Seal for Hydraulic |
|---|---|
| Material | PTFE-filled polymer (with additives for increased wear resistance) |
| Temperature Range | –50°C to +250°C |
| Hardness | 60–80 Shore A |
| Compression Set | Low |
| Chemical Resistance | High (resistant to oils, hydraulic fluids, chemicals) |
| Friction Coefficient | Low |
Comparison: PTFE Step Seal vs Standard O-Rings
| Feature | PTFE Step Seal | Standard O-Ring |
|---|---|---|
| Wear Resistance | Excellent | Moderate |
| Friction | Low | High |
| Pressure Resistance | High | Moderate |
| Temperature Range | –50°C to +250°C | –30°C to +120°C |
| Leakage Control | Low leakage risk | Higher leakage risk under extreme conditions |
Typical Applications
KAFLON® PTFE Step Seals are widely used in a variety of hydraulic applications, including:
Hydraulic cylinders
Hydraulic pumps and valves
Industrial machinery
Construction equipment
Mining and excavation machines
Mobile and heavy-duty hydraulic systems
Pressure control systems
These seals are primarily recommended for dynamic sealing applications where high pressure, temperature, and chemical exposure are common.
Material Construction Options
KAFLON offers multiple PTFE-based and rubber compound to meet different operating conditions:
1. Elastomers (Rubber Materials)
- NBR – General oil-resistant material
- HNBR – Improved heat & mechanical strength
- FKM – High temperature & chemical resistance
- EPDM – Water & steam resistance
- VMQ (Silicone) – Wide temperature range, FDA available
- FFKM – Extreme chemical resistance
2. Thermoplastics (Engineering Plastics)
PTFE (Virgin & Filled) – Low friction, chemical resistant
PEEK – High strength, high pressure
POM – Wear resistant, dimensionally stable
Why Choose KAFLON® PTFE Step Seals?
Enhanced Durability
With a specialized PTFE-filled compound, these seals offer outstanding resistance to wear and compression set, ensuring long-term sealing performance.
Efficient Performance
The low-friction step seal design reduces energy loss and prolongs the life of hydraulic components.
Tailored Solutions
KAFLON provides custom sizes and compounds to meet the specific demands of your hydraulic systems.
Reliable Under Extreme Conditions
Designed for high-pressure environments, these seals provide secure sealing even in harsh operational conditions.
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