Circulator pump Termojet AUTO energy-saving APM 32/8/180 mm

Termojet AUTO APM 32/8/180 mm circulating pump — a powerful energy-saving circulating pump of the APM series with an ECM permanent-magnet motor and wet rotor. Installation length 180 mm, threaded connection 1¼″ BSP, power consumption 5–80 W, maximum flow rate 8 m³/h at a head of up to 8 m. The increased performance makes the APM 32/8 the choice for boiler rooms, large heating systems and facilities where the standard DN25 size is insufficient.

Technical Specifications

Operating Modes

Constant differential pressure — Δp-c. The pump maintains the set pressure differential between the supply and return pipework regardless of load. Optimal for radiator systems in large houses and cottages: system balance is preserved at any degree of opening of the thermostatic valves.

Proportional differential pressure — Δp-v. The differential pressure decreases proportionally with the reduction in flow rate. At partial load the pump automatically reduces pressure and speed — and thus power consumption as well. Recommended mode for underfloor heating systems, mixed circuits and facilities with a variable load profile.

Applications

• Boiler rooms of private residences and small commercial facilities requiring a high flow rate of 5–8 m³/h.
• Large radiator systems with branched pipework and 1¼″ threaded connection.
• Circuits from a solid-fuel or pellet boiler to a buffer tank: the high flow rate ensures rapid charging of the buffer.
• Replacement of an outdated pump of the equivalent DN32 size with 180 mm installation length and 1¼″ thread. Suitable for pump group NG-51.150 (180 mm) and NG-52.150 (180 mm).
• Heat pump systems in large buildings: the increased flow rate suits extensive underfloor heating circuits.

Why the ECM Motor Is More Cost-Effective

An uncontrolled DN32 pump of similar performance continuously consumes over 100–200 W. The APM 32/8 consumes 5–80 W: the ECM motor with permanent magnets and integrated frequency converter reduces speed as load decreases — halving the flow rate can reduce consumption by a factor of 3–4.

Wet rotor technology: the rotor operates in the heat-transfer fluid without shaft seals or external lubrication. No scheduled maintenance, quiet operation, high reliability.

• Consumption 5–80 W at a flow rate up to 8 m³/h — significant savings compared with an uncontrolled equivalent.
• Wet rotor — zero maintenance.
• Installation length 180 mm and 1¼″ BSP thread — drop-in replacement without modifying pipework.
• Ukrainian manufacture: no customs delays, fast service, official warranty.

For Heat Pump Systems

In large buildings, a heat pump generates significant flow rates of heat-transfer fluid at 30–55 °C. The APM 32/8 with Qmax 8 m³/h and Hmax 8 m delivers the required circuit performance with minimum power consumption thanks to the ECM motor. For information on heat pumps for large buildings — Termojet heat pumps.

Frequently Asked Questions

What is the difference between the APM and APE series?
The APM series has a higher maximum flow rate (APM 32/8 — up to 8 m³/h, APE 32/80 — up to 4 m³/h) at comparable head. Choose APM if the calculated system flow rate exceeds the capability of the APE series.

Is a separate frequency converter needed for control?
No. The ECM motor of the APM series already has a built-in frequency converter and regulates speed automatically according to the selected mode. View Termojet pump groups.