Glyd ring is a double-acting combined piston seal made of filled PTFE rectangular slide ring and elastic rubber O-ring. Featuring low friction and excellent anti-extrusion performance, it is widely installed on piston of hydraulic cylinders. Standard product withstands 40MPa working pressure, and customized formula can reach over 55MPa. Multiple material collocations are available to adapt various temperature and hydraulic medium environments for construction machinery, injection molding and metallurgical equipment.