Zurcon® Glyd Ring® D is a double-acting piston seal crafted from advanced Zurcon® Z13 polyurethane with an energizing elastomer O-Ring. Its distinctive D‑shaped profile includes two specialized grooves that maintain an oil film, ensuring smooth lubrication, reduced friction, and minimal heat buildup. Ideal for heavy-duty mobile hydraulics such as construction machinery, cranes, and forklifts, it provides long service life and enhanced performance under demanding conditions.