Reliable Hydraulic Sealing That Reduces Leaks and Downtime
If you are running hydraulic cylinders and need a seal that holds pressure, reduces leakage, and lasts, this rod U-Cup delivers. Built from high-performance 92 AU 9250 polyurethane, this twin lip rod seal is designed to maintain tight sealing under dynamic conditions while minimizing wear on your system.
This seal is ideal for operators who want consistent performance, longer service life, and fewer maintenance interruptions. The 92 durometer polyurethane provides a strong balance of flexibility and toughness, making it a dependable choice for demanding hydraulic applications.
Operating temperature: -40° to +225°F (–40° to +107°C)
Material & Performance Details
This rod seal is manufactured from Disogrin D300 series polyurethane (92 AU 9250), a premium material known for durability and resistance in hydraulic systems.
- Material: Polyurethane (92 AU 9250)
- Durometer: 92 Shore A
- Color: Typically Blue or natural polyurethane tone
Performance strengths:
- High abrasion resistance for long service life
- Excellent extrusion resistance under pressure
- Strong tear resistance for dynamic applications
- Low compression set for consistent sealing force
Chemical compatibility:
Excellent resistance to:
- Hydraulic oils (mineral-based)
- Greases
- Petroleum-based fluids
Limited capability with:
- Water and water-glycol fluids
- Mild chemicals depending on concentration
Not compatible with:
- Strong acids
- Strong bases
- High concentrations of steam or hot water
Sizes & Measurements
- Cross Section (CS):
7.8 mm | 0.310 in - Inside Diameter (ID):
25.40 mm | 1.000 in - Outside Diameter (OD):
34.92 mm | 1.375 in - Part Number: RTU187-1.000-312B
- Series: D300 Rod Seal
Applications & Use Cases
This rod U-Cup is built for hydraulic rod sealing where pressure retention and contamination control matter. Common applications include:
- Hydraulic cylinders in mobile equipment
- Industrial presses and machinery
- Construction and agricultural equipment
- Material handling systems
- Fluid power systems requiring dynamic sealing
The twin lip design helps keep fluid in and contaminants out, improving system reliability and reducing premature wear.
Key Specifications
- Material: Polyurethane (92 AU 9250)
- Durometer: 92 Shore A
- Color: Green / Natural
- Temperature Range: -40°F to +225°F (–40°C to +107°C)
- Pressure Capability: Suitable for hydraulic rod applications (system dependent)
- Brand: Freudenberg
- Country of Origin: Mexico
- Compliance: REACH compliant, ROHS available upon request
Why Buy from The O-Ring Store LLC
When you source this seal from us, you are not just getting a part, you are getting confidence in your operation.
- ISO9001:2015 certified processes ensure consistent quality
- USA-based inventory for faster delivery
- Same-day shipping on in-stock items
- Full lot traceability available when needed
- Technical support from a team that understands sealing applications
- Competitive pricing without cutting corners
We focus on getting you the right seal the first time, so your equipment stays running and your team stays productive.
Frequently Asked Questions
1. What makes polyurethane rod seals better than rubber options?
Polyurethane offers higher abrasion resistance and longer life in hydraulic applications. It handles pressure and wear better than most standard rubber compounds.
2. Can this seal handle high-pressure hydraulic systems?
Yes, this material is designed for hydraulic rod sealing. Final pressure capability depends on gland design, clearances, and system conditions.
3. Is this seal interchangeable with other D300 or equivalent rod seals?
In most cases, yes, if the dimensions match. Always confirm groove design and application requirements to ensure proper fit and performance.
