8U-2373 8U2373 Original Construction Machinery Parts Seal O-Ring 12M 150 12K

1. Quick Details of  seal 8U-2373:

2. 8U-2373  picture:

3. Service part number :

 
4. FAQ

Q: What role do these piston seal rings serve in a hydraulic cylinder?
A: These rings are precision-engineered pressure-sealing components for the piston. They form a dynamic, low-friction barrier inside the cylinder bore, preventing high-pressure fluid from crossing the piston. This ensures the cylinder maintains its force output, avoids drift, and operates efficiently.

Q: What materials are these seals made of?
A: These black piston seals are most commonly made of high-performance polyurethane (PU) for heavy-duty use, or nitrile rubber (NBR) for general-purpose applications. Some variants may also use a rubber-PTFE composite, combining the elasticity of rubber with the low-friction properties of PTFE.

Q: Why are these materials chosen for piston seals?
A: Polyurethane excels in high-pressure, abrasive environments, offering superior wear resistance and resistance to extrusion. It maintains its shape and sealing force even under repeated movement and pressure spikes. Nitrile rubber is a reliable, cost-effective choice for standard systems, with good compatibility with most hydraulic oils. The composite variants balance flexibility and low friction, reducing heat buildup and extending service life in high-cycle applications.

Q: What is the correct installation process for these piston seals?
A: Start by thoroughly cleaning the piston and all seal grooves to remove debris, old fluid, or residue. Inspect the grooves for burrs or sharp edges that could damage the seals. Lubricate the seals and grooves with clean hydraulic fluid. Carefully expand the seals just enough to fit them into the piston grooves, making sure they are not twisted or overstretched. When inserting the piston into the cylinder, use a tapered installation sleeve to compress the seals evenly and guide them smoothly into the bore without damage.

5. Exhibition and Wearhous

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