Expert Mechanical Seal Repair | Waterjet Cut | Precision Gasket Cutting
Pusher seals utilize a dynamic secondary seal which moves axially with the major seal face. Defined by the secondary seal type, either o-ring or polymer wedge.
Consult with one of our knowledgeable technical sales representative with your requirements to assure the best bellows seal to suit your pump unit and application.
A pusher-type seal consists of a primary sealing ring assembled with an 'O' ring and springs which force the sealing liquid across the face and keep it from leaking to the ID side of the seal.
The dynamic O-ring is designed to be pushed axially along the shaft. The surface underneath the dynamic Oring must therefore be very smooth to allow for axial movement. If solids are abundant in the sealing fluid, they can build up on the o-ring and prevent this axial movement.
Pusher types seals are less expensive and are readily available in a wide range of sizes and designs. The only disadvantage being a tendency to hang up and fretting of the shaft.
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