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Polyurethane U-Seal, 4.00 Inch OD, 3.50 Inch ID, 0.25 Inch Height
Brand
Hercules Sealing Products
Brand
Hercules Sealing Products
Supplier Part Number
U25-3.50-SQB
Alternate Part Numbers
Alternate Part Number
C1DP50 ,
Alternate Part Number
MI-01011219 ,
Alternate Part Number
MINO-00407X25229
Does this seal hold up alright in systems running close to that 6,000 PSI ceiling, or is that more of a theoretical max?
Question by: Donna D on Apr 7, 2025, 8:01 PM
Polyurethane handles high-pressure hydraulic duty pretty well as a material, and the rated range for this seal runs from 0 all the way to 6,000 PSI. That upper figure is the published limit, so running near it isn't operating outside spec. That said, sustained operation at peak pressure puts more wear on any seal over time, same as any other component in a high-load hydraulic system.
Answer by: Customer Support on Apr 9, 2025, 6:18 AM
What kind of temps can this seal handle, cause it gets pretty hot where I'm working.
Question by: Keith P on Nov 8, 2025, 4:30 PM
This Hercules U-seal is good for use in temperatures ranging from -65°F to 220°F.
Answer by: Customer Support on Nov 10, 2025, 7:27 AM
got a cylinder that takes a 3.50 ID u-seal, is this one the right size or am i readin it backwards
Question by: Lyle E on May 7, 2025, 6:51 PM
Fit comes down to the seal dimensions. This U-seal is 3.50 inch ID, 4.00 inch OD, with a 0.25 inch cross section and 0.25 inch height, so it matches setups calling for those exact measurements.
Answer by: Customer Support on May 9, 2025, 4:00 PM
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