Wipers: page 49
Scrapers are sealing components that protect the hydraulic cylinder; they are fitted to the rod at the front end. They prevent dust, dirt, abrasive particles and moisture from entering, thereby protecting the seals and the rod surface. If the wiper rings do not function correctly, contaminants can quickly damage the seals and wear down the rod, leading to higher maintenance costs. In the Hydraulic Seals Store catalogue, you will find polyurethane and rubber wiper rings in a range of sizes, available from stock with fast delivery in Romania.
The role of scrapers in protecting hydraulic systems
Scrapers act as a shield for the interior of the hydraulic cylinder. As the rod retracts, the scraper removes particles from its surface before the rod re-enters the cylinder. This prevents contaminants from reaching the internal seals, significantly extending the service life of the entire assembly. A worn or missing scraper allows dirt to enter, which accelerates wear on the rod seal and can lead to damage to the cylinder. To ensure a complete seal around the rod, scrapers are used in conjunction with rod seals and hydraulic sleeves.
Applications for scrapers
Hydraulic cylinders, industrial machinery, mobile and agricultural equipment
Scrapers are used in the hydraulic cylinders of excavators, bulldozers, cranes, tractors, combine harvesters and hydraulic presses. They are essential wherever the cylinder rod is exposed to dust, mud or other contaminants. Forestry machinery, lifting systems and industrial plant also require high-quality scrapers.
What to look out for when choosing scrapers
Choosing the right seal depends on the diameter of the cylinder rod and the type of seat in the cylinder head (open or closed seat). The material of the lip – polyurethane or rubber – is chosen according to environmental conditions (temperature, type of contaminants, presence of water). The lip profile (single or double lip) affects the effectiveness of the protection. See also the hydraulic seals category for complete cylinder sealing solutions.
Advantages of buying scrapers from the Hydraulic Seals Store
At the Hydraulic Seals Store, you’ll always find hydraulic scrapers in stock, in a range of sizes and materials, at competitive prices and with fast delivery across Romania. You can order easily online, and our team is on hand to provide technical support. Choose high-quality scrapers at a great price, straight from our catalogue.
Frequently Asked Questions
How do I choose the right seals for the rods?
Choose the scraper based on the cylinder rod diameter and the type of recess in the cylinder head. The material (polyurethane or rubber) should be selected according to the environmental conditions of the application.
What dimensions are important for scrapers?
The key dimensions are the inner diameter of the wiper (corresponding to the rod diameter), the outer diameter and the width. These must fit the recess in the hydraulic cylinder head exactly.
When should a worn seal be replaced?
The scraper must be replaced when it shows visible wear, cracks or deformation, when it allows contaminants to enter the cylinder, or when traces of dirt appear on the cylinder’s internal seals.
What types of wiper seals are available?
The Hydraulic Seals Store catalogue includes single-lip and double-lip scrapers, made from polyurethane and rubber, in standard and special profiles, suitable for various types of hydraulic cylinders.