AV Wiper Seal

Descriptions

The AV wiper protects the hydraulic system against, dust, dirt, moisture and other
environmental influences.
The moulded dirt shield on the wiper prevents the migration of moisture underneath
the wiper in the groove. The common occurrence of corrosion in the groove can thus
be avoided. In applications with a vertically positioned piston rod head the dirt shield
to protect the seal groove is particularly effective. Water running down the piston rod
is diverted and does not enter the wiper groove. Due to the press fit in the housing
and the pressure relief drill hole the risk of the wiper being pushed out of the cylinder
housing is minimised.

Features

• Robust seal profile for harshest operating conditions.
• Extreme wear resistance.
• Excellent media resistance in case of
suitable compound selection.
• Suitable compounds available for
special requirements of the chemical
process industry.
• Suitable compounds available for special requirements of the food processing
industry.
• The dirt shield prevents the intrusion
of dirt and moisture in vertical cylinder
applications.
• Installation in closed and undercut
housings.
• Additional sizes of machined products
available on short notice.

Range of application
The AV wiper can be used in all hydraulic cylinders and is particularly well-suited for
mobile applications.

Compounds
The standard material is Ultrathan® P5008, a Parker compound based on polyurethane with a hardness of approx. 93 Shore A. Compared to off-the-shelf polyurethane
grades it is characterized by higher thermal and hydrolysis resistance and a lower
compression set.
Installation
The profile AV double lip wiper ring can easily be snapped into grooves of simple
design. Any contact of the wiper lip with piston rod eyes or other connecting parts
should be avoided.
However, we recommend the wiper lip to be out-side the housing, so that the wipedoff dirt falls off.
A ring-shaped area for improved abutting of the dirt shield should be provided at the
front side of the cylinder.