Grundfos - ALPHA1 20-40 N 150 Hot Water Circulator Pump - 230V - Single Phase - 25 Ltr/min.

Grundfos ALPHA1 high-efficiency circulator pumps are designed for circulating liquids in heating systems. The stainless-steel variant of ALPHA1 is appropriate for, for example, domestic hot-water systems. With an energy efficiency index (EEI) at the ErP benchmark for most high-efficiency pumps, it contributes to energy savings.

The pump can operate in proportional-pressure, constant-pressure and constant-curve mode. The control mode is selected using the button on the display. The LEDs indicate the operating status, actual power consumption in watts as well as warnings and alarms.

The design and materials of the pump contribute to a long service life. The pump is self-venting through the system, which contributes to straightforward commissioning. The space-efficient design, featuring a pump head with an integrated control box, fits into most common installations. The pump and motor form an integral unit without a shaft seal. The bearings are lubricated by the pumped liquid. These design features ensure maintenance-free operation.

Pump housings made of Cast Iron are electrocoated to improve corrosion resistance. The motor is a synchronous permanent-magnet/space-efficient-stator motor characterised by high efficiency. Pump speed is controlled by an integrated frequency converter incorporated in the control box.

Pumps are supplied with insulating shells to minimise heat loss in heating systems.

Suitable for: Commercial heating, Domestic heating, Domestic hot water recirculation

Real-world product applications

• Circulating water around closed-loop pipework systems
• Maintaining flow through distribution circuits
• Supporting recirculation in building services installations
• Keeping consistent flow through equipment or pipe runs
• Assisting with loop circulation for system efficiency

Key Product Features

• Net weight: 1.99 kg
• Mains frequency: 50 / 60 Hz
• Approvals: CE,VDE
• Rated Head: 2.01 m
• Max Head: 40 dm
• Rated Flow: 1.5 m³/h
• Product Voltage: 1 x 230 V
• Temperature Liquid Range: 2 .. 110 °C
• Pumped Liquid: Water
• Port to Port Length: 150 mm
• Connection Size: 1 1/4 inch
• Type of connection: G
• Maximum Operating Pressure: 10 bar
• Impeller Material: Composite
• Pump Housing Material: Stainless Steel

This is a Grundfos Circulator pump which can be used within closed loop cooling, heating and hot water systems.

Grundfos (est. 1945) is a Danish pump manufacturer known for high-efficiency circulators, multistage boosters, borehole and wastewater pumps, plus packaged pressure systems. The range covers HVAC circulation, domestic hot water recirculation, pressure boosting, industrial water transfer and public water management, with strong focus on energy efficiency and intelligent controls.