CIRCULATION OF THE HEAT TRANSFER FLUID

An efficient heat transfer through the die tunnels is based on a motor pump correctly sized for flow rate, head and power.

There are several types of electrical pumps, classified according to the way power is transferred from the motor to the impeller. Transmission can be magnetic or though a mechanical joint.

Mechanically sealed pumps have a static or moving gasket, fitted to the power shaft.

This means that their application is limited to light duties with oil temperatures up to 170°C and water in non pressurised loops.

Magnet drive pumps, thanks to the absence of rotating seals, allow applications in extreme conditions with temperatures up to 350°C for oil and 200°C for water at high pressure.

The reliability of these pumps ensures continuous operation, avoiding the down time required for the maintenance of ordinary pumps.