Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
O-Ring Loaded U-Cup Seal – Black PU 85 Shore A
The O-Ring Loaded U-Cup Seal is engineered to provide optimal sealing for hydraulic and pneumatic applications, ensuring reliable performance under varying pressures. With its 85 Shore A black polyurethane construction combined with an NBR O-ring energizer, this seal offers exceptional extrusion resistance, making it suitable for demanding environments while extending the overall service life of your equipment.
Product Overview
This O-Ring Loaded U-Cup Seal is a high-performance sealing solution designed for both hydraulic and pneumatic applications. It consists of a tough Polyurethane (PU) outer jacket and an inner O-Ring expander. This dual-component design ensures reliable sealing under varying pressures and provides excellent compensation for wear and clearance changes.
Material & Design
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Outer Jacket (Seal Ring): Made of high-quality Black Polyurethane (PU), 85 Shore A hardness. PU offers outstanding wear resistance, high tensile strength, and excellent extrusion resistance.
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Inner Energizer: Equipped with an NBR O-Ring expander that maintains constant radial force, ensuring a tight seal even at low pressures and compensating for minor hardware misalignments.
Technical Specifications
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Material: Black PU (85 Shore A) + O-Ring Expander
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Inner Diameter (ID): 0.750" (19.05 mm)
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Outer Diameter (OD): 1.250" (31.75 mm)
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Width / Thickness: 0.250" (6.35 mm)
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Groove Width: 0.275" (6.99 mm)
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Operating Temperature: -54°C to +149°C (-65°F to +300°F) (Note: Based on standard PU/NBR limits)
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Maximum Pressure: Up to 5,000 psi (dependent on hardware clearance)
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Maximum Speed: 1.6 ft/sec
Key Features & Advantages
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Excellent Extrusion Resistance: The 85 Shore A PU material allows it to withstand high pressures without extruding into the clearance gap.
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Low-Pressure Sealing: The inner O-ring expander ensures a reliable seal even when system pressure is low.
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Wear and Abrasion Resistance: Ideal for harsh environments and dynamic applications.
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Versatile Application: Suitable for both piston and rod sealing in hydraulic and pneumatic cylinders.
Typical Applications
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Hydraulic cylinders and presses
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Pneumatic actuators
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Construction and agricultural machinery
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Industrial fluid power systems
Customization & Supply
At Forever Seals, we manufacture U-Cup seals in various sizes and materials. Whether you need standard dimensions or custom designs based on your drawings or samples, we offer factory-direct pricing and fast delivery.
Get In Touch With Us
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