Wiper, Type AS 02
The wiper type AS 02 equipped with two sealing edges is a double-acting seal. It consists of a PTFE profile ring and an O-ring as a preload element. The wiper function is taken over by the PTFE profile ring. The seal lip of the profile ring wipes off impurities from the retracting piston rod.
The inner lip reduces the grease layer thickness on the extending piston rod. These wipers are suitable for use with mineral oil-based hydraulic liquids, environment-friendly bio-oils and water and even with flame-resistant hydraulic liquids and air. The wipers provide very good gliding behavior and stick-slip free running, good dry-running properties and high wear resistance.
Application media
Mineral oil-based hydraulic liquids: environment-friendly bio-oils
Water: flame-resistant hydraulic liquids
Air: other media, depending on the O-ring material
Application range
Speed: approx. up to 15m/s
Temperature: -30°C to + +200°C (depending on the O-ring material)
Surface finish
| Roughness depth | Ra | Rt |
| Running surface | ≤ 0,3 µm | ≤ 3,0 µm |
| Groove base | ≤ 1,6 µm | ≤ 16,0 µm |
| Groove flank | ≤ 1,6 µm | ≤ 16,0 µm |
Installation dimensions
| Rods ø D Standard version | Groove base ø D | Collar diameter ø D1 | Groove width L | Radius R | X min. | O-ring thickness ø |
|---|---|---|---|---|---|---|
| 15,0 – 64,9 | ød + 6,8 | ød + 1,5 | 5,0 | 0,7 | 2,0 | 2,62 |
| 65,0 – 250,9 | ød + 8,8 | ød + 1,5 | 6,0 | 1,0 | 3,0 | 3,53 |
| 251,0 – 420,9 | ød + 12,2 | ød + 2,0 | 8,4 | 1,2 | 3,0 | 5,33 |
| 421,0 – 650,9 | ød + 16,0 | ød + 2,5 | 11,0 | 1,5 | 4,0 | 7,0 |
| 651,0 – 900,0 | ød + 20,0 | ød + 2,5 | 14,0 | 1,5 | 5,0 | 8,4 |
PTFE profile ring material
PTFE + bronze
The standard for hydraulic applications, good gliding behavior, particularly pressure and abrasion resistant, cannot be used in aqueous solutions or acids
PTFE + Glass-MoS2
Particularly wear and abrasion resistant, can be used even with poorly lubricating pressure media, in water and also in water-oil emulsions
PTFE + Carbon
Exceptional resistance to abrasion and extrusion; can be used in water-hydraulics
For other possible materials see our overview of PTFE materials in the technical information section.
O-ring material
Nitrile rubber NBR: Temperature range − 30 °C to +120°C
Fluororubber FPM: Temperature range − 30 °C to +200°C
Materials overview for dynamic seals (PDF)
The following overview is a selection of typical PTFE materials used for seals, guide elements and wipers. Other PTFE materials are available for special applications.
Product data sheet (PDF)
Our data sheet for the wiper type AS 02 can be found here.
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