Grundfos MAGNA3 25-80 Circulating Pump

MAGNA3 25-80

With its unrivalled efficiency, all-encompassing range and built-in communication capabilities, the MAGNA3 is ideal for engineers and specifiers looking to create high-performance heating and cooling systems. MAGNA3 is the ideal choice for almost any building project – old or new. The pump is of the canned-rotor type, which means that pump and motor form an integral unit without shaft seal and with only two gaskets for sealing. The bearings are lubricated by the pumped liquid. The MAGNA3 is a pump with no maintenance requirements and with extremely low life cycle cost.

Characteristic features

AUTOADAPT FLOWADAPT and FLOWLIMIT (reduces the need for pump throttling valves) Proportional-pressure control Constant-pressure control Constant-temperature control Differential temperature control (requires an additional temperature sensor) Constant-curve duty Maximum and minimum curve duty Automatic night setback Heat energy monitor No external motor protection required Innovative clamp ring with only one screw enabling easy repositioning of the pump head Insulating shells supplied with single-head pumps for heating systems Large temperature range due to air cooled electronics

Communication

Wireless communication with the Grundfos GO Remote app Fieldbus communication via CIM modules Digital inputs Relay outputs Analog input

Product details

The MAGNA3 is a single-phase pump and characterised by the following

Controller integrated in the control box Control panel with TFT display on the control box Control box prepared for optional CIM modules Built-in differential-pressure and temperature sensor Cast-iron pump housing (also available in stainless steel versions) Carbon-fibre-reinforced composite rotor can Stainless-steel bearing plate and rotor cladding Aluminium alloy stator housing Air-cooled power electronics

Motor and electronic controller

The MAGNA3 incorporates a 4-pole synchronous, permanent-magnet motor (PM motor). This motor type is characterised by higher efficiency than a conventional asynchronous squirrel-cage motor. The pump speed is controlled by an integrated frequency converter.