Diaphragm type piston rod seal is a flexible membrane dynamic sealing element specially designed for hydraulic cylinder piston rods. Unlike conventional lip-type rod seals relying on sliding friction, this diaphragm seal works by elastic deformation of the thin membrane. It maintains reliable sealing while the piston rod reciprocates, effectively blocking hydraulic oil leakage along the rod and avoiding stick-slip phenomenon under low pressure.
Manufactured from fabric-reinforced elastomer material, the Diaphragm piston rod seal combines good flexibility, high tensile strength and outstanding oil resistance. Its integrated membrane structure resists tearing and fatigue under repeated reciprocating cycles. It can operate steadily under working pressure up to 28 MPa, with operating temperature ranging from -30℃ to 100℃. It keeps stable sealing performance with minimal friction.
Compatible with mineral hydraulic oil and most conventional hydraulic fluids, Diaphragm rod seals are widely used in precision hydraulic cylinders, engineering machinery and hydraulic control valves. It fits standard installation groove dimensions for convenient assembly and direct replacement. With low friction, stable sealing and long fatigue life, the Diaphragm piston rod seal provides a unique low-friction sealing solution for precision reciprocating hydraulic equipment.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
