A scraper prevents the adhering dirt and dust of the rod from being drawn into hydraulic and pneumatic systems. Scrapers exist in a variety of materials; the most common ones are PTFE (with or without fillers), elastomer and polyurethane.
The Scraper A4 is a one-piece scraper with two wiper lips, and is available in polyurethane (TPU). It is characterized by its excellent abrasion resistance and features high durability due to the advantages of TPU. The second sealing lip wipes off the residual oil film from the rod. The scraper A4 can be used for pressures up to 2 MPa.
The scraper A4 is particularly suitable for mobile hydraulics with heavy dirt. The standard TPU compound for scraper A4 has a hardness of 90 - 95 Shore A.
|pressure||up to 2 MPa|
|temperature||-40°C / +100°C (material dependent)|
|speed||up to 1 m/s|