Grundfos ALPHA1 25-40 (180 mm) VFD Circulation Pump for 18,000–25,000 kcal/h Boilers, 4 m, 2.6 m³/h

Grundfos ALPHA1 25-40 Variable Frequency Drive Circulation Pump

The Grundfos ALPHA1 25-40 is a high-efficiency circulation pump designed for liquid circulation in heating systems. It contributes to energy savings through its Energy Efficiency Index (EEI), which meets the ErP standard for the most efficient circulators. It is the ideal solution for basic functionality requirements.

Grundfos ALPHA1 25-40 Features

• Control modes are easily selected thanks to intuitive single-button operation.
• Installation time is reduced since no external motor protection is required.
• The pump starts up more reliably under demanding conditions with high-torque start.
• Maintenance-free and quiet operation thanks to a seal-less rotor and durable components.
• The Grundfos ALPHA1 25-40 plug simplifies electrical installation, making it faster and safer.
• Insulation shells are supplied with the pump to minimize heat loss in heating systems.
• The display shows actual power consumption in watts. LEDs indicate the actual operating status.

The pump has three control modes and three settings:

• proportional pressure control
• constant pressure control
• constant curve mode.

Ceramic shaft and radial bearings, carbon-supported bearing, stainless steel rotor, bearing plate, and rotor coating extend the pump's service life.

The Grundfos ALPHA1 25-40 pump is self-venting, which makes commissioning easier. The compact design with an integrated control box and a pump head with control panel is suitable for a wide range of installations.

The pump casing is made of cast iron with an electrophoretic coating for corrosion resistance.

The motor is of the synchronous permanent magnet / compact stator type, characterized by high efficiency. Pump speed is controlled by an integrated variable frequency drive (VFD) combined with the control box.