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Pawling Engineered Products

Engineered Elastomeric Technologies for Sealing, Clamping, Actuating

Pulp and Paper Processing

Custom Seals for Pulp and Paper Processing

Inflatable seals solve a number of unique problems in the pulp and paper industry. For one, paper manufacturing equipment is usually quite large. Trying to control tolerances between mating pieces of equipment or to account for the thermal expansion/contraction of metal can be nearly impossible when trying to use a traditional seal like an o-ring. Use of an inflatable seal in these instances would be able to take up these variations. Also, clamping large rolls of paper or pushing long doctor blades can be handled more easily with a product that can account for tolerance variations more easily than more traditional methods.

Detailed Market Applications

Inflatable Clamp/Actuator for Doctor Blades
Doctor Blade ActuatorsProduct: Pneuma-Seal
Use: Inflatable Clamp/Actuator
Description: Inflatable bladders are used to clamp doctor blades of varying thicknesses in their holders and to apply uniform pressure along the blade length in inkers, coaters, and other critical doctor blade applications (click image to view animation).
Inflatable Brakes/Stops for Conveyor Applications
Inflatable Conveyor Brake/StopProduct: Pneuma-Seal and Pneuma-Cel
Use: Inflatable Clamp/Actuator
Description: Inflatable clamps configured with two sealed ends can positioned along the sides of the conveyor belt or rolls and inflated against the product to temporarily interrupt the flow while the jam clears downstream. Alternately, the bladders can be located underneath the conveyor and activated to release the contact between belt and rollers. (click image to view animation). Pawling EP also offers a standardized bladder clamp called the Pneuma-Cel which works very well in these applications.
Shaft Shutdown Inflatable Seal
Shaft Shutdown Inflatable SealProduct: Pneuma-Seal
Use: Inflatable Seal
Description:  Inflatable seals provide an excellent temporary shaft seal during shutdown and maintenance operations. It can be inflated against the stationery shaft while packings or mechanical seals are being changed thereby eliminating the necessity to drain mixers and agitators before the changeout. After the new packings or mechanical seals are in place, the seal is deflated allowing the shaft to rotate freely. The same concept can be applied to the changeout of marine propeller shaft seals (click image to view animation).
Single Inflatable Bladder Expandable Mandrel
Expanding Mandrel Inflatable BladderProduct: Pneuma-Seal
Use: Inflatable Clamp/Actuator
Description: Custom designed circular bladders actuate metal buttons, lugs, or rubber shoes to grip on the inside of the core for winding and unwinding paper rolls in slitters or other converting and production operations. (click image to view animation).
Multi-Bladder Expandable Mandrel
Expanding Mandrel Inflatable BladderProduct: Pneuma-Seal
Use: Inflatable Clamp/Actuator
Description: Custom designed linear bladders designed to run the length of the shaft actuate metal buttons, lugs, or rubber shoes to grip on the inside of the core for winding and unwinding paper rolls in slitters or other converting and production operations. (click image to view animation).