Polyurethane Compound Suits Hydraulic Applications

Trelleborg Sealing Solutions' Zurcon Z25 polyurethane compound is recommended for all hydraulic applications where high-temperature performance is required. Offering improved extrusion resistance and compression set, Zurcon Z25 demonstrates all the characteristics of Zurcon grade Z20 with an elevated operating temperature up to 130C/270F. The material is suited for use in heavy-duty cylinder-sealing applications, where it can guarantee a long service life.

These include industrial and mobile applications with limited cooling systems or cylinders exposed to high-temperature painting processes. Self-energising, Zurcon Z25 operates at pressures up to 40MPa/5,800psi without a Back-up Ring. It is suitable for use in all hydraulic fluids and has a low compression set. It has an MDI (diphenylmethane diisocyanate) material base and is also suitable for rotary applications such as swivel joints, where heat is generated by high pressures and low speeds.

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