Circulator pump Termojet AUTO energy-saving APM-F 40/8/220 mm

Termojet AUTO APM-F 40/8/220 mm circulating pump — a flanged energy-saving circulating pump with an ECM permanent-magnet motor and wet rotor. Flange connection DN40, installation length 220 mm, maximum head 8 m. The flange connection provides a reliable joint in boiler rooms and commercial systems where a threaded connection is impractical or inconvenient for installation and maintenance.

Technical specifications

Operating modes

Constant differential pressure — Δp-c. The pump maintains a set pressure difference between the supply and return lines regardless of system load. Standard mode for boiler rooms with radiator systems and thermostatic valves.

Proportional differential pressure — Δp-v. As flow decreases, the pump proportionally reduces differential pressure and power consumption. Recommended for variable-load systems: underfloor heating, combined circuits, installations with weather-compensated control.

Applications

• Boiler room of a private house or small commercial facility with DN40 flange connection.
• Heating systems for office, warehouse, and industrial premises requiring a flange connection for easy pump installation and removal.
• Replacement of an obsolete DN40 pump in an existing boiler room — DN40 flange connection is the industry standard for equipment of this class.
• Systems with a heat pump and an extended underfloor heating circuit. For compatible equipment, see Termojet Mega series and Termojet pump groups.

Why an ECM motor is more cost-effective

An unregulated pump of comparable DN40 output consumes constant fixed power regardless of system load. An ECM motor with permanent magnets and a built-in frequency converter smoothly adjusts speed — the pump consumes exactly what the system needs at any given moment. Wet-rotor technology eliminates shaft seals and external lubrication: the rotor is cooled and lubricated by the heat-transfer fluid with no scheduled maintenance.

• ECM motor — significant savings compared to unregulated pumps of a similar class.
• Wet rotor — zero maintenance throughout the service life.
• DN40 flange connection — reliable and convenient installation in boiler rooms.
• Ukrainian manufacture: no customs delays, fast service, official warranty.

For heat-pump systems

A DN40 flanged pump with ECM motor is the optimal choice for boiler rooms with heat pumps that require higher output and convenient flange connection. Heat-carrier from HP 30–55 °C; Δp-v mode allows the pump to automatically adapt to variable load. Learn more — Termojet heat pumps.

Frequently asked questions

How does a flanged pump differ from a threaded one?
DN40 flange connection provides a rigid and leak-tight joint that can be dismantled without special tools. Used in boiler rooms and industrial systems where connection reliability and ease of maintenance are the priority.

Where can I find larger flanged Termojet models?
DN50 and DN65 pumps from the APM-F series are available for larger installations. See Termojet Mega series and Termojet pump groups.