The liquid is delivered from the suction side through the impeller to the discharge side. A thermal barrier avoids the direct heat transfer from the pump to the motor part. The motor heat losses are dissipated by a secondary cooling / lubricating circuit via a separate heat exchanger. This cooling / lubricating circuit also supplies the slide bearings. Thus the liquids at temperatures up to +400 °C can be conveyed while the secondary cooling cycle is at a lower temperature level. This construction is also suitable for conveying polluted or particle-containing liquids. If applicable, pure process liquid needs to be injected into the motor circuit.
For the delivery of hot organic heat transfer oil, as well as heating bath liquids. This design can also be used for aggressive, toxic, explosive, precious, inflammable, radioactive and slightly volatile liquids.
CN: –120 °C to +360 °C
CNF: –120 °C to +360 °C
CNK: –120 °C to +400 °C
Power: up to 300 kW at 1450 rpm [50 Hz] up to 400 kW at 2900 rpm [50 Hz] up to 336 kW at 1750 rpm [60 Hz] up to 448 kW at 3500 rpm [60 Hz]
Voltage: 400 / 690 V (additional tensions possible)
Insulation class: H-180 C-220 / C-400
Frequency: 50 or 60 Hz (also suitable for operation with frequency converter)
Degree of protection: IP 67
Motor protection: PTC thermistor e.g. KL180 (for H winding) KL210 (for C-220 winding) alternative Pt100 resistance thermometer (for all windings)