AF Wiper Seal
Descriptions
The profile AF Ultrathan® 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 imbedded in the sliding parts.
The excellent wiping effect is achieved by the special design of the wiper lip.
The proven PU-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 scan vis-a-vis the external diameter of the seal housing,
the wiper is securely held in place in the axially open installation housing. Thanks to
the flush end fit of the wiper lip with the cylinder head the lip enjoys a high degree of
protection against damage from external causes.
Profile AF provides a proper sealing end device from an engineering point of view and,
in conjunction with our rod seals profiles B3 and BU constitutes a sealing system that
has been tried and proven under the toughest field conditions.
Features
• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Suitable for fully automatic installation.
• Dimensions according to DIN ISO 6195,
Type B.
• Simple fabrication of the housing.
Range of application
Hydraulic cylinders and valves.
| Operating temperature | -35 °C to +100 °C |
| Sliding speed | ≤ 2 m/s |
Compounds
Standard material of the elastomer part is Ultrathan® P5008, 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 AF Ultrathan® 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 |
| 25 | 35 | 7 | 1 |
| 30 | 40 | 6 | 1 |
| 36 | 48 | 6 | 1 |
| 40 | 50 | 7 | 1 |
| 40 | 52 | 6 | 1 |
| 45 | 55 | 7 | 1 |
| 45 | 60 | 7.5 | 1 |
| 50 | 60 | 7 | 1 |
| 50 | 65 | 7.5 | 1 |
| 56 | 70 | 7.5 | 1 |
| 57.15 | 69.96 | 7.92 | 1.5 |
| 60 | 70 | 7 | 1 |
| 60 | 74 | 8 | 1.5 |
| 60 | 75 | – | 0.7 |
| 63 | 73 | 7 | 1 |
| 63 | 78 | 7.5 | 1 |
| 65 | 79 | 8 | 1.5 |
| 65 | 80 | 5 | 0.7 |
| 69.85 | 95.4 | 12.7 | 2 |
| 70 | 80 | 7 | 1 |
| 70 | 84 | 8 | 1.5 |
| 70 | 85 | 7.5 | 1 |
| 71 | 86 | 5 | 0.7 |
| 75 | 85 | 7 | 1 |
| 75 | 89 | 8 | 1.5 |
| 75 | 90 | 5 | 0.7 |
| 76.5 | 96.5 | 10 | 2 |
| 80 | 90 | 7 | 1 |
| 80 | 94 | 8 | 1.5 |
| 80 | 95 | 5 | 0.7 |
| 80 | 100 | 10 | 2 |
| 82.55 | 108.08 | 12.7 | 2 |
| 85 | 95 | 7 | 1 |
| 85 | 99 | 8 | 1.5 |
| 85 | 105 | 10 | 2 |
| 90 | 100 | 7 | 1 |
| 90 | 104 | 8 | 1.5 |
| 90 | 105 | 6 | 1 |
| 90 | 110 | 10 | 2 |
| 95 | 109 | 8 | 1.5 |
| 100 | 114 | 8 | 1.5 |
| 100 | 115 | 7 | 1 |
| 100 | 115 | 9 | 1.5 |
| 100 | 120 | 10 | 2 |
| 101.6 | 114 | 8 | 1.5 |
| 110 | 125 | 9 | 1.5 |
| 110 | 126 | 9 | 1.5 |
| 110 | 130 | 10 | 2 |
| 120 | 140 | 8 | 1.5 |
| 120 | 140 | 10 | 2 |
| 125 | 140 | 9 | 2 |