What Are The Seals in The Hydraulic Cylinder

1, the piston rod seal

Hydraulic cylinder piston rod seal, also known as U-cup, is the main piston rod seals, installed in the hydraulic cylinder end cap on the inside, the role is to prevent hydraulic oil leakage. Hydraulic cylinder piston rod seal made of polyurethane or nitrile rubber, in some occasions need to be used with the support ring (also known as retaining ring), support ring used to prevent the seal from extruding under pressure deformation, piston rod seal also has a variety of variants.

2, buffer seal

hydraulic cylinder buffer seal as an auxiliary piston rod seal, used to protect the piston rod in the system pressure suddenly increased. There are three types of cushion seals common to hydraulic cylinders. type A is a single-piece seal made of polyurethane, type B and C are used to prevent seal extrusion and allow the seals to withstand higher pressures.

3, guide support ring

guide support ring installed in the hydraulic cylinder end cap and piston, used to support the piston rod and piston to guide the piston to do straight-line movement, to prevent the occurrence of hydraulic cylinder metal-to-metal contact, the material on the plastic and coated with polytetrafluoroethylene bronze and so on.