Larox peristaltic pump benefits in a paint factory

Larox Flowsys, the preferred supplier of cutting-edge flow control technology, has supplied eight LPP65 pumps to Alcro-Beckers, a leading Swedish paint producer owned by the Finland�s biggest paint company Tikkurila Oy, which is part of Kemira Group. The Larox pumps have been successfully operating since the start up of a new Latex paint factory in 2007.

LPP pumps were chosen instead of often used screw pumps for feeding emulsions to the dissolvers and to the finishing tanks. When the screw pump is run dry, mechanical sealing, stator and rotor assembly will be often damaged. The binders in the Latex emulsions become very hard if they are in contact with air. As the mechanical seal wears, it starts to leak and create maintenance and environmental problems to the process.

The advantages of Larox pumps include the fact that only the hose is in contact with the emulsion. This isolates pumped medium from being in contact with air. Seal less LPP pumps will not get damaged even if they run dry for longer periods of time.

In LPP pumps the cylindrical rotor rotates along the hose and the process medium gets pushed forward through the hose. At the same time, the hose behind the compression point reverts to its original shape creating a suction effect at the pump inlet port. As a result, the hose bore gets filled with the medium. No backward flow can occur as the hose is squeezed tight by the roller. The LPP pump is also very gentle to the pumped medium and does not mix or shear it.