The function of the Parker Prädifa wiper rings profile A5 is to prevent dust, dirt, grains of sand or swarf from penetrating. This is achieved by a special design which largely prevents the development of scratches, protects the guiding parts, and extends the service life of the seals.

This wiper ring profile A5 requires to screw-rings or brackets for its installation. No close tolerances are necessary and no metal inserts. The wiper is supplied as a continuous ring and may easily be mounted into the groove. Ant pressure loads on the back of the ring should be avoided.

Field of application:

The Parker Praedifa Profile A5 wiper rings are used for rods in hydraulic and pneumatic cylinders and rod guides.

Working temperature:         -40 to +100 ºC pneumatics +80 ºC

Surface speed:                        ≤ 4 m/s

Installation:

Profile A5 wiper rings can easily be snapped in grooves of relatively simple design. Any contact of the wiper lip with piston rod eys or other connecting parts should  be avoided.  It is recommended, however, that the wipers be installed outside the casings, so that the wiped-off dirt may be easily removed.

Compound

The standard compound is an NBR-elastomer with a Shore hardness of approx. 90 Shore A. We recommend quality N3769 for use in mining equipment. Please contact our Consultancy Service before deciding on the material.

For special requirements (temperature, speed
etc.) please contact our Consultancy Service,
so that suitable materials and/or designs can be recommended.