Rubber Graphite Sealing Strips

The sealing strip plays a crucial role in the vacuum press roller, as it prevents pulp and moisture from seeping into the roller body and protects the equipment from damage. At the same time, the correct installation direction can ensure a tight fit between the sealing strip and the roller body, thereby improving the sealing effect, reducing energy consumption, and extending the service life of the equipment.

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Product Description

Paper Machine Suction Roll Sealing Strip

The vacuum suction roller is one of the most expensive rollers in paper machines, and a sealing device must be used between the vacuum box and the inner wall of the roll for good sealing. It mainly consists of sealing groove, sealing strip, elastic device, and other components.

sealing strip for suction roll

Working Principle of Sealing Strip

A pneumatic tire is installed at the bottom and another on the side of the sealing strip. The bottom one, known as the "pressurized pneumatic tire", is first inflated to bring the strip into contact with the inner wall of the roller. Then, the side tire, called the "locked pneumatic tire", is inflated while the pressurized tire is depressurized.

Through a specially designed structure, the sealing strip is slightly lowered and positioned, forming a small gap between the strip and the inner wall of the roller. This ensures the vacuum level of the vacuum box while minimizing wear.

Due to operational vibration, the sealing strip may shift after a period of use, increasing the gap and reducing the vacuum efficiency. At this point, the automatic detection and control system reactivates both pneumatic tires to restore the preset gap between the seal and the roller wall.

This adjustment process is repeated to maintain stable sealing performance.

suction roll sealing strip