Advanced design

Strategically located cups maintain a triple seal
throughout your batching and line cleaning jobs. The Knapp Polly Tri-Cup’s design allows it to easily traverse joints, valves, bends - virtually any pipeline formation!

Enhanced flexibility

Flexible, one-piece construction ensures that the Knapp Polly Tri-Cup is always centered in the line. Result - more even cup wear and a constant triple barrier against product interface. Improves cup seal by allowing expansion of pig body by line pressure.

Maximum strength

Tough and durable, the one-piece polyurethane body outclasses the performance of rigid metal parts in other pigs. Extra urethane in the nose section puts reinforcement where it is needed most.

Light weight

Designed to be lighter than conventional metal pigs, the Knapp Polly Tri-Cup does not sacrifice strength or endurance. High compliance elastomers minimize cup wear and your per-foot costs, while ensuring  maximum sealing capability.  The Polly Tri-Cup is available with steel wire brushes for enhanced cleaning.

Sanitary Applications

The Polly Tri-Cup pipeline pig is available in Knapp's exclusive Food-Grade Ultrathane for use in sanitary pipelines.

Polly Tri-Cup Conical

The Polly Tri-Cup is available in 3" through 12" with conical cups in some sizes.  Please check with the factory.