Wiper JA
JA wipers are specialized protective seals for blocking fine abrasive dust on hydraulic cylinder rods. Standard wipers do not stop fine particles of cement, quartz, or ore — they pass through the wiping lip and reach the seal, where they act as a fine abrasive and wear it out quickly, within a week of intensive operation. JA has a wider contact area with the rod, which blocks precisely these small particles of 10-100 microns that other profiles allow to pass through. The specific geometry and complete dimensions are available on the hydsealstore shop, with recommendations for cement plants and mining.
Technical and Functional Characteristics of JA Wipers
Made of polyurethane with calibrated Shore A hardness — hard enough to block fine particles, soft enough not to wear the chrome-plated rod through excessive friction. The balance between these two requirements is difficult to achieve, and JA is the result of specific calibration for particles below 100 microns. The wider contact area compared to standard wipers increases the length of the path that fine particles must travel to penetrate the wiper, which effectively blocks them through a labyrinth effect. It operates between -30°C and +100°C. Compatible with HLP and HVLP mineral oils. The other components of the sealing system are available in the range of hydraulic seals.
The Importance of Dust Protection in Hydraulic Systems
Particles of 10-100 microns — cement, quartz, ore — easily pass through the standard lip and reach the seal, where they act as an abrasive between the sealing lip and the rod. Result: accelerated seal wear, external leaks, and a scratched rod — a degradation cycle that accelerates exponentially once the rod is marked. JA blocks these particles at the wiper level and extends the service life of the entire sealing system, not just the seal. Ideal for cement, mortar, and ceramics plants and any cylinder permanently exposed to fine abrasive dust, where overhaul intervals are doubled with JA compared to a standard wiper. The covered abrasion levels are available in hydraulic wipers.
Criteria for the Correct Selection and Installation of JA Wipers
JA is specifically chosen when the environment contains high concentrations of fine abrasive cement, quartz, or ore dust. For coarse dust or stones, the correct choice is different — GHP or DKBI. The groove must be thoroughly cleaned — fine dust deposits must be completely removed, otherwise they act as abrasive material from the very first stroke. JA is inserted without forcing, keeping the geometry of the contact area intact — if it is deformed during installation, the efficiency of blocking fine particles decreases significantly and the advantage disappears. The rod seals that complete the system are available in rod seals.
Advantages of Purchasing JA Wipers from Hydraulic Seals Store
Hydraulic Seals Store offers polyurethane JA wipers for applications where the cylinder rod is exposed to fine dust and abrasive particles, such as cement, quartz, or ore. The profile is designed to provide an extended contact area with the rod and to limit the penetration of fine particles toward the internal seals. For correct selection, the rod diameter and installation groove dimensions, as well as the contamination conditions in the application, must be checked. Our team can provide technical assistance in selecting the appropriate profile. Discover the range of JA wipers and order online the right product for environments with abrasive dust.