U-Cup Seal

U-Seal, 20X28X5.7

The MRTU-20X28X5.7 U-Seal is a tough molded urethane rod seal featuring a Twin Lip design with an additional lip near the heel for improved stability and performance. This design helps with friction-reducing lubricant retention and adds a contaminant-blocking barrier, making it a strong choice for demanding hydraulic applications. The VME variation places the secondary lip farther from the heel than standard MRTU—because sometimes the best way to stop leaks is to give them one more thing to argue with.

Country of Origin
Varies by production batch

Key Features / Specifications

• Product / Part Number: MRTU-20X28X5.7
• Product Type: U-seal / rod seal
• Material: Urethane (E = European Urethane option noted)
• Design: Twin Lip with additional lip near heel
  • Improves stability
  • Helps retain lubricant for reduced friction
  • Adds contaminant blocking
• Part Number Format: (Prefix) - (ID) x (OD) x (H)
• Rod Diameter: 20.00 mm
• Nominal ID (A): 20 mm
• Nominal OD (B): 28 mm
• Nominal Height (C): 5.7 mm
• Groove Width (D): 6.30 mm
• Housing Diameter (G): 28.00 mm
• Temperature Range: -40°F to +225°F
  • E urethane note: -22°F to +212°F
• Pressure Range: 0 to 5,000 PSI
• Max Speed: 3 ft/sec
• Weight: 0.004125 lb

Ideal For

• Hydraulic cylinders needing a urethane U-seal / rod seal with added stability
• Applications where lube retention helps reduce friction and wear
• Systems up to 5,000 PSI with rod speeds up to 3 ft/sec
• Environments where a secondary lip helps keep contaminants out
• Anyone who wants their seals to hold pressure—not hold grudges