Grundfos NB 40-200/206 Cast Iron 11 kW End Suction Centrifugal Pump with Closed Impeller

Driven by a 11 kW electric motor, the NB 40-200/206 end-suction centrifugal pump features an axial suction port (DN 65) and a radial discharge port (DN 40). Specified for commercial HVAC circulation, district heating installations, and industrial process water distribution, the pump mounts securely onto floor inertia bases in mechanical plant rooms.

Hydraulic wet-end output delivers a rated flow volume of 934 L/Min with a maximum operational head limit of 45.48 m. The EN-GJL-250 cast iron casing receives cataphoresis electrocoating to limit surface oxidation. Inside, a stainless steel impeller works alongside bronze wear rings and a BQQE shaft seal. Physical net weight measures 147 kg.

Electrical power for the NB 40-200/206 model is supplied by a 415 V three-phase electric motor rated at 11 kW output power. Nominal operating current draw measures 21.5 Amps during full load operations. Operating liquid temperatures span from -25°C to 120°C under 16 bar working pressure. Suction inlet measures DN 65 with a DN 40 discharge port.

Motor protection on the NB 40-200/206 pump complies with IP55 enclosure standards to resist dust and moisture ingress, supported by Class F thermal insulation and internal PTC thermistors. The back-pull-out casing layout allows service personnel to remove the motor drive and rotor assembly without unbolting the pump volute from system suction and discharge piping headers.

Features

• Housing, impeller and wear ring use dissimilar material pairings to prevent galling and ensure no sticking elements during extended standby periods.
• High-efficiency motor selection is configured to match the specific power supply characteristics, pumping environment and liquid properties of each installation.
• Back pull-out design allows complete rotating assembly removal including motor, coupling and impeller without disturbing pump housing or connected pipework.
• EN733 and ISO2858 dimensional compliance ensures interchangeability with other standard end-suction pumps across commercial and industrial installations.
• ATEX Zone 1, 2, 21 or 22 certification available for operation in potentially explosive atmospheres (except E-model variants).
• Integrally cast suction and discharge ports with dedicated vent and drain ports provide direct connection points without additional fittings.
• No baseplate or grouting required to maintain correct shaft alignment and vibration levels within Hydraulic Institute standards.

IMPORTANT:Bulk freight charges apply. Please contact us for a freight quote before ordering.