Pneumatic Cylinder Seal Sets

Pneumatic cylinder seal sets are matched collections of sealing elements installed in a single actuator to convert compressed air into reliable linear motion. A typical double-acting cylinder set includes a piston seal, a rod seal, two rod wipers and two cushion seals. Because these seals share the same bore, rod diameter, groove geometry and operating conditions, specifying them as a set ensures compatible friction, wear life and dynamic response across the entire actuator. ISO 15552 is the most common standard for profile-style pneumatic cylinders, covering bore sizes from 32 mm to 320 mm with standardized groove dimensions for piston and rod seals. ISO 6432 covers compact round-body cylinders from 8 mm to 25 mm bore. We supply seal sets for both standards as well as direct replacements for common manufacturer series including SMC C96/CP, Festo DSBC/DNC and AirTAC SC/SU. The right seal set depends on more than bore diameter. Air quality, cycle rate, temperature, lubrication and side load all affect material choice. NBR is the default for clean, lubricated plant air. TPU is preferred for high-cycle or minimally lubricated applications because of its wear and tear resistance. FKM is used when the air is hot or contaminated with synthetic lubricants or chemical vapors. Our cylinder seal sets are organized by bore diameter and rod diameter. Each set is matched to the groove geometry of the target cylinder standard or manufacturer series. For non-standard or proprietary cylinders, we assemble custom sets from drawing or sample. Maintenance departments can keep common bore sizes in stock to minimize downtime during actuator rebuilds.