The customer had an end-user experiencing repetitive failures of the mechanical seal being used on a screw conveyor for mashed wood and steam feeding the refiner in a thermo-mechanical pulp application.

Roplan was invited to find a solution to solve the problem, and after studying the equipment and application a unique shaft seal with floating static arrangement was especially designed for the application, capable of handling the established ±13 mm of axial movement present due to the thermal effects on the equipment. The customer has chosen to use this design on all equipment supplied used in this type of application on several thermo-mechanical pulp sites.