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Icon Scraper

Scraper – Hydraulic seals

Scrapers are installed in hydraulic and pneumatic cylinders to wipe off dirt, foreign particles, chips, ice, moisture etc. from the piston bar. This prevents contamination of the medium and protects seals, guides and other components.

Standard profiles

The standard profiles shown below are wipers that represent the state of the art. We manufacture these standard wipers in-house or supply them as moulded parts from approved partners for all required groove dimensions in a variety of materials. Depending on the quantity, the material and your requirements, we offer wipers in the appropriate manufacturing process – everything from one source!

You can find a general overview and further information in the following categories:

  • Standard wipers
  • Scrapers with preload elements
Choosing the correct profile

The more information is known, the better a wiper system can be adapted to a specific application.

A basic distinction is made between single-acting wipers, which protect the hydraulic or pneumatic system from external contamination, and double-acting scrapers, which must also be seen as part of the sealing system in interaction with the seals.

To choose the right profile and the optimal material, the following criteria are important:

  • installation space
  • temperature range
  • medium
  • lifting speed
  • counter surface
  • installation option
  • friction behaviour
  • service life expectancy
  • price and availability

Standard scrapers

Application
  • high efficiency
  • suitable for all areas of hydraulics and pneumatics
  • single-acting: to wipe off dirt and moisture, for example
  • double-acting, to additionally reduce the lubricant film discharge
  • can be mounted in open and closed grooves
  • many dimensions available as molded parts
  • double wipers must be matched to the sealing system used
Sliding speeds:

up to 1 m/s

Temperature range:

-55 to +220 °C (depending on material)

Scrapers with leader elements made of elastomer

Application
  • for all areas of hydraulics and pneumatics
  • single-acting: to wipe off dirt and moisture, for example
  • double-acting: to additionally reduce the lubricant film discharge
  • low friction
  • wide range of materials
  • also largest diameters, intermediate sizes and inch dimensions can be realized
  • mounting in closed grooves from diameter
  • 20 mm possible
  • double wipers must be coordinated with the sealing
  • system used
  • heavy-duty wipers available, e.g. DA130
Sliding speeds:

up to 15 m/s

Temperature range:

-55 to +280 °C (depending on material)