The One That Beats the Odds

Due to its highly corrosive properties, there are only a few pumps that can reliably handle sulphuric acids and fewer that can provide flexible flow control when the supply tank is on a higher level than the discharge head. The Larox LPP can do both

Since its installation in early 2004 at Kemira Growhow Plant in Finland, the Larox peristaltic pump has been pumping sulphuric acid to a thickener in which the sulphuric acid reacts as a flocculent

Equipped with a detector for early hose leak warning, the LPP is working as the main pump; a standby pump is reserved for maintenance. Hose changes are carried out according to a preventive maintenance schedule

The sulphuric acid concentration ranges from 20 to 30% at ambient temperatures with slurry specified gravity (S.G.) of 1.3. The flow rate varies from 0.2 to 0.5 m³/h and the maximum speed is 35 rpm

The flow-rate is controlled by an inverter; the average flow being 9 l/min. A PID control loop with fixed set point and process feedback from Krohne Coriolis mass flow meter controls the pump

The PID controller gives a control signal of 4 - 20 mA to the inverter, which regulates the speed and flow of the pump

Made of the most durable and resistant materials, the robust  Larox Flowsys LPP provides a safe and reliable liquid transfer even when handling the most aggressive media.