Wiper seal Prädifa series A7 | South Africa

Wiper seal Prädifa series A7 | Product Series

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Outside Diameter (mm)

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Seal Material

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Wiper seal Prädifa series A7

Wiper seal, single-acting, standard.

Technical Specifications

  • Thermal Application Type: Expanded Low and High Temperature (< -35 to 140°C), High Temperature (< 205°C), Standard Moderate Temperature (-35 to 100°C)
  • Media: Hydraulic
  • Polymer Material Options: Polyamide (PA)
  • Maximum Operating Pressure: 0 bar
  • Minimum Operating Temperature: -40 °C
  • Maximum Operating Temperature: 110 to 140 °C
  • Maximum Surface Speed: 1 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
Safety Warning

Full Product Description

The A7 wiper seal / ring primarily serves as a scraper and additionally prevents ingress of dust, dirt, sand and swarf into dynamic rod guidances. This is achieved by its special shape and largely prevents scoring, protects the guidance parts and extends the service life of the seals. The A7 wiper ring is used to scrape heavily adhering particles off the cylinder rod. It should always be used in combination with an elastomer wiper seal. In this configuration, the A7 wiper seal closes the rod sealing system vis-à-vis the environment of the hydraulic cylinder. Pressure loading against the back of the ring should be prevented.


• Outstanding scraper properties for harsh sticking particles.

• Extreme wear resistance.


Range of application:

The A7 wiper ring is used in axially operated rods in hydraulic and pneumatic working cylinders, plungers and rod guidances in earth moving and mining equipment.

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