Wiper DKBI
DKBI wipers are protective seals made of high-density polyurethane for hydraulic cylinders in heavy industry — 50-100 ton excavators, mining machinery, industrial presses with intensive cycles, and drilling equipment with fine abrasive particles. Where a standard wiper lasts a few hundred cycles, DKBI lasts two to four times longer, which makes a difference on machinery operating in three shifts. Complete codes, dimensions, and versions with or without a metal insert are available on the hydsealstore shop, with filters by the intensity of operating conditions.
Polyurethane DKBI Wipers: Technical Characteristics and Advantages in Use
High-density polyurethane has superior abrasion resistance compared to NBR or standard rubber, with a Shore A hardness of 92-95 that maintains the shape of the lip even in contact with fine abrasive dust. The lip maintains firm and uniform contact with the rod after thousands of cycles, without losing its shape or cleaning efficiency, while cut resistance prevents cracks that would allow particles to pass through. It operates between -30°C and +110°C, with stable performance. Advanced versions include a metal insert — for applications with direct mechanical impacts on the rod or with stones striking the front of the cylinder. The remaining cylinder components are available in the range of hydraulic seals.
Use of DKBI Wipers in Hydraulic Applications and Harsh Industrial Environments
DKBI is found in heavy excavators in quarries, in mining machinery exposed to fine abrasive quartz or ore dust, in industrial presses with intensive cycles, and in drilling equipment with mud and hard particles. The higher initial cost compared to a standard wiper is quickly recovered through longer intervals between overhauls and reduced unplanned downtime — rebuilding a main cylinder on a heavy-duty excavator costs as much as dozens of wipers, and DKBI protects precisely this investment. Versions with and without a metal insert are available in the range of hydraulic wipers, with recommendations for each operating condition.
Important Factors for Choosing the Right DKBI Wipers
If the environment involves direct mechanical impacts on the rod or stones striking the cylinder — choose the version with a metal insert, without compromise. If the main issue is fine abrasive dust without impacts — the high-density PU version without an insert is sufficient and more economical. The groove must be thoroughly cleaned, including traces of the old seal fixed in place by pressure and temperature. The lip must face outward, with attention to symmetry. Lightly lubricate before initial startup to ensure proper seating. The piston seals in the same cylinder are available in the range of piston seals.
Advantages of Purchasing DKBI Wipers
For cylinders operating in harsh industrial environments, with abrasive dust and particles that can quickly damage seals, Hydraulic Seals Store offers DKBI wipers made of high-density polyurethane. Depending on the application, versions with or without a metal insert can be selected.
The selection must be made according to the rod diameter and exact groove dimensions, as well as the actual operating conditions. If the rod is also exposed to impacts or larger particles, the configuration with an insert can be considered. For correct identification, you can send us the cylinder dimensions and the type of environment in which it operates.