AH Wiper Seal
Descriptions
The profile AH Ultrathan® double wiper ring serves the purpose of preventing the
penetration of dust, dirt, sand, and metal swarf into hydraulic cylinders. This reduces
the risk of scoring caused by contaminants from external sources embedded in the
sliding parts. The excellent wiping effect is achieved by the special design of the wiper
lip. In addition, the sealing lip on the side of the medium reduces the residual oil film.
The proven Ultrathan® compound P5008 stands for high abrasion resistance, minor
permanent deformation, and robustness vis-a-vis external mechanical impact. By
means of a press fit of the metal case vis-a-vis the external diameter of the seal housing, the wiper is securely held in place in the axially open installation housing.
Features
• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Suitable for fully automatic installation.
• Product geometry prevents dirt deposits at the front face of the cylinder.
• Simple fabrication of the housing.
Range of application
Hydraulic cylinders
| Operating temperature | -35 °C to +100 °C |
| Sliding speed | ≤ 2 m/s |
Compounds
Ultrathan® P5008 is a polyurethane-based Parker compound with a hardness of approx. 93 Shore A.
In comparison with other polyurethane materials currently available on the market it
excels because of its increased heat and wear resistance.
Installation
The profile AH double wiper rings are manufactured with a slightly oversized outer diameter D, thus ensuring a secure press fit in the groove DH8 after installation. Any contact of the wiper lip with piston rod eyes or other connecting parts should be avoided.
| d | D | L | a |
| 20 | 30 | 7 | 1 |
| 22 | 32 | 7 | 1 |
| 25 | 35 | 7 | 1 |
| 28 | 38 | 7 | 1 |
| 32 | 42 | 7 | 1 |
| 36 | 46 | 7 | 1 |
| 40 | 50 | 7 | 1 |
| 45 | 55 | 7 | 1 |
| 50 | 60 | 7 | 1 |
| 56 | 66 | 7 | 1 |
| 60 | 70 | 7 | 1 |
| 63 | 73 | 7 | 1 |
| 70 | 80 | 7 | 1 |
| 70 | 80 | 7 | 1.5 |
| 75 | 89 | 8 | 1.5 |
| 80 | 90 | 7 | 1 |
| 80 | 90 | 8 | 1.5 |
| 80 | 94 | 8 | 1.5 |
| 85 | 99 | 8 | 1.5 |
| 90 | 100 | 7 | 1 |
| 90 | 100 | 9.5 | 1.5 |
| 90 | 104 | 8 | 1.5 |
| 90 | 109 | 8 | 1.5 |
| 100 | 110 | 7 | 1.5 |
| 100 | 114 | 8 | 1.5 |
| 100 | 115 | 9 | 1 |
| 115 | 125 | 9 | 1 |
| 125 | 140 | 9 | 1 |