Circulator pump Termojet AUTO energy-saving APM-F 50/8-240 mm

Termojet AUTO APM-F 50/8-240 mm circulator pump — a compact flanged pump with an ECM permanent-magnet motor for medium-scale heating and cooling systems. Flanged connection DN50, installation length 240 mm, maximum head 8 m, flow rate up to 16 m³/h, heat-transfer medium temperature 0°C to +110°C, protection degree IP44.

Technical Specifications

AUTO Operating Modes

Constant differential pressure (Δp-c). The pump maintains the set pressure differential between the supply and return regardless of the current system load. Δp-c mode is the right choice for boiler rooms where the load of heating or cooling systems fluctuates depending on external conditions.

Proportional differential pressure (Δp-v). The differential pressure decreases proportionally to the flow rate as the load decreases. Δp-v mode minimizes consumption at partial system load and reduces noise level. Recommended for systems with zone control or a daily/seasonal heat consumption schedule.

Applications

• Boiler room of a private or small commercial facility with DN50 flanged piping and moderate hydraulic resistance (up to 8 m).
• Heating systems of medium-sized office or industrial premises.
• Cooling systems (chiller–fan coil) with DN50 piping.
• Solar heating systems and process heating up to +110°C.
• Termojet Mega series — catalogue: full range of Termojet flanged pumps.
• Termojet pump groups — catalogue.
• Medium-capacity heat pump systems: Termojet heat pumps.

Why an ECM Motor is More Economical

The ECM motor of the APM-F 50/8 smoothly adjusts its speed to match the current system demand. Unlike unregulated pumps that consume fixed power regardless of load, the APM-F 50/8 uses minimum power in base mode and increases output only when necessary. Electrophoretic coating of the housing protects against corrosion. EPDM seals are designed for the full service life of the pump without replacement. The built-in water cooling of the motor keeps noise levels below 50 dB and ensures a long service life without external maintenance.

APM-F 50/8 and Heat Pump Systems

For medium-capacity heat pumps with a DN50 primary circuit, the APM-F 50/8 delivers up to 16 m³/h and in Δp-v mode automatically adapts to the variable HP output. If a higher flow rate or head is required — consider APM-F 50/12 or APM-F 50/15. Full catalogue of heat pump solutions: tjheatpump.com.ua.

Frequently Asked Questions

What is the difference between APM-F 50/8 and APM-F 50/12?
APM-F 50/8 has a lower maximum head (8 m vs. 12 m) and lower flow rate (16 m³/h vs. 25 m³/h). APM-F 50/8 is suitable for systems with moderate hydraulic resistance and lower heat load — lower power, lower cost, lower consumption.

Is APM-F 50/8 compatible with Termojet pump groups?
APM-F 50/8 is a flanged model (DN50), so it is used in systems with flanged piping rather than in standard pump groups with threaded connections. See Termojet Mega series for selecting the appropriate equipment.