Plastic Filter Pump Assembly
A pump and valve manufacturer contacted SPIROL to help solve an issue with their filter pump. The filter pump consisted of a cover fixed to the pump housing. With internal pressure and applied torque, the assembly needed to resist 22 N-m. They were using six Expansion Inserts with M8 bolts within 30% glass filled polypropylene plastic. A sub-contractor was manually installing each Insert at the perimeter of the housing flange. When required pressure was applied, the Inserts were coming off with the bolts resulting in the pump opening up. The client was looking for a reliable and efficient solution to meet his specifications.