Stop hydraulic leaks and restore cylinder performance with the U250-1.000-250B Polyurethane Symmetric U-Cup Hydraulic Seal. This seal is built for hydraulic cylinder repair where fit, stability, and sealing reliability matter.
Its symmetric U-Cup profile allows use in many rod or piston sealing applications, depending on the cylinder design. The polyurethane material provides good wear resistance, extrusion resistance, and sealing support in demanding hydraulic service.
Operating Temperature
Operating temperature: -35° to +176°F (-35° to +80°C)
Material & Performance Details
This U250-1.000-250B seal is made from polyurethane for hydraulic cylinder sealing applications. Polyurethane is commonly used where abrasion resistance, tear strength, and extrusion resistance are important.
The symmetric U-Cup design helps provide sealing force on both lips and supports stable performance in rod or piston applications. This profile is useful for repair shops and maintenance teams that need a dependable hydraulic seal with a clear size and profile match.
- Excellent resistance to:
- Abrasion and wear
- Hydraulic oil service
- Extrusion under pressure
- General hydraulic cylinder movement
- Limited capability with:
- High-temperature hydraulic systems above the rated range
- Applications above the stated pressure or surface speed limits
- Not compatible with:
- Fluids or chemicals not verified for polyurethane compatibility
Final compatibility should be verified against the hydraulic fluid, pressure, temperature, and equipment conditions.
Sizes & Measurements
- Dimensions: 1"ID X 1-1/2"OD X 1/4"HT
- Actual: 1.000"ID X 1.500"OD X 0.250"HT
- Metric: 25.40mm ID X 38.10mm OD X 6.35mm HT
- Part Number: U250-1.000-250B
- Profile: Symmetric U-Cup
- Seal Type: Hydraulic U-Cup Seal
- Rod Size: 1"
- Bore Size: 1-1/2"
- Cross Section: 1/4"
- Height: 1/4"
Applications & Use Cases
The U250-1.000-250B Polyurethane U-Cup Seal is used in hydraulic cylinders for rod sealing, piston sealing, and general cylinder repair where a symmetric U-Cup profile is required.
Typical applications include:
- Hydraulic cylinders
- Rod seal repairs
- Piston seal repairs
- Mobile hydraulics
- Agricultural equipment
- Construction equipment
- Dump trailers
- Forklifts
- Log splitters
- Presses
- Pumps and valves
- Industrial maintenance and repair
- Hydraulic repair shops
The customer benefit is simple: better fit identification, fewer leaks, faster repairs, and less downtime. Clear sizing also helps reduce wrong-part orders.
Key Specifications
- Material: Polyurethane
- Durometer: Not specified
- Color: Not specified
- Seal Type: Hydraulic U-Cup Seal
- Profile: Symmetric U-Cup
- Application: Hydraulic cylinder sealing
- Rod or Bore Use: Rod or piston use, depending on cylinder design
- Temperature Range: -35° to +176°F (-35° to +80°C)
- Pressure Rating: Not specified
- Surface Speed: Not specified
- Fluid Compatibility: Hydraulic oil service, final compatibility must be verified
- Certifications: Not specified
- Country of Origin: Not specified
- Brand or Manufacturer: Not specified
Why Buy from The O-Ring Store LLC
The O-Ring Store LLC helps customers get the right hydraulic seal faster, with less guesswork. Our ISO9001:2015 certified quality processes support reliable order handling, traceability, and consistent service. We stock hydraulic seals in the USA for fast delivery, offer same-day shipping on in-stock items, and help identify seals by size, profile, and application.
For repair shops, maintenance teams, and equipment owners, that means fewer wrong orders, faster cylinder repairs, and better confidence when ordering. We make getting O-Rings and hydraulic seals easy.
3 Most Common FAQs
How do I know if this hydraulic seal will fit my cylinder?
Match the seal by ID, OD, and HT first. This seal measures 1.000"ID X 1.500"OD X 0.250"HT. Also confirm the rod size, bore size, groove width, groove depth, and seal profile. Photos of the old seal and groove can help confirm the correct replacement.
Can this seal be used as both a rod seal and piston seal?
This is a symmetric U-Cup seal, so it may work as either a rod seal or piston seal depending on the cylinder design. Final use should be confirmed by the groove design, pressure direction, movement, and equipment requirements.
What information should I provide before ordering?
Provide the seal dimensions, material, fluid type, operating temperature, pressure, rod or piston use, equipment type, and photos if available. The more detail you provide, the easier it is to help confirm the right seal.
