PPY type rotary joint seal is a dedicated rotary dynamic seal specially developed for hydraulic rotary joints (rotary unions). Unlike reciprocating piston and rod seals, this PPY seal is designed to work under continuous rotational motion, preventing fluid leakage between stationary housing and rotating shaft while maintaining smooth rotation of the rotary joint. Its optimized lip profile provides stable contact pressure, balancing low friction torque and reliable sealing performance.
Made of premium polyurethane material, the PPY rotary joint seal features outstanding wear resistance, good tear strength and low friction coefficient. It resists extrusion and abrasion under combined pressure and rotary movement, effectively avoiding early seal failure caused by continuous rotation. It can operate reliably at working pressure up to 32 MPa, with operating temperature ranging from -30℃ to 100℃.
Compatible with mineral hydraulic oil and most common hydraulic fluids, PPY rotary joint seals are widely used in excavator swivel joints, engineering machinery rotary unions and other industrial rotary fluid delivery systems. It fits standard rotary joint groove dimensions for easy installation and direct replacement. Minimizing fluid leakage and reducing maintenance downtime, the PPY rotary joint seal delivers a durable and cost-effective rotary sealing solution for heavy-duty hydraulic rotary equipment.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
