Pump group Termojet with mixer 1 1/4" FT in thermal insulation without pump PG-52

Pump group with mixer NG-52.150 — a Termojet unit of enlarged size 1¼″ BSP for high-capacity heating circuits up to 85 kW that require supply temperature control from boiler room automation. The three-way valve with electric actuator smoothly regulates the supply temperature, while the high flow capacity Kvs 10.3 m³/h ensures low hydraulic resistance.

Operating principle: the boiler room automation sends a command to the electric actuator, which rotates the three-way mixing valve and blends cooled return water into the supply — the circuit temperature precisely matches the setpoint, including in weather-compensated modes. Ball valves with thermometers on supply and return lines show the actual operating conditions and allow the circuit to be isolated for servicing; the built-in check valve eliminates parasitic circulation; the thermal insulation jacket reduces heat losses.

Applications: high-capacity underfloor heating, radiator branches of large buildings, circuits with weather-compensated control, and low-temperature systems with a heat pump — see Termojet heat pumps. Mounting the group on a Mega manifold is possible via adapter PNG50/32; KP21.250.150. If the circuit is sufficient for size 1″, consider the pump group NG-48A L with drive-controller.

Advantages of NG-52.150 from Termojet:

• enlarged size 1¼″ — up to 85 kW per circuit;
• three-way valve with electric actuator — precise control from boiler room automation;
• complete factory kit: ball valves with thermometers, check valve, thermal insulation jacket;
• manufactured in Ukraine, competitive price, manufacturer's warranty.

Technical specifications: maximum output 45 kW at ΔT=10 °C and 85 kW at ΔT=20 °C, Kvs 10.3 m³/h, connection to manifold and heating circuit — 1¼″, working pressure up to 6 bar, dimensions 471×296×160 mm, volume 1.1 l. Pump installation length — 180 mm; the pump is purchased separately — the energy-saving Termojet APE 25-60 pump (180 mm) is suitable.

Other sizes and configurations — in the Termojet pump groups catalogue.

Frequently Asked Questions

How does NG-52.150 differ from a group with a thermostatic valve?
Temperature is controlled not by an autonomous thermostatic valve but by an electric actuator responding to commands from the boiler room automation — this provides more precise and weather-compensated regulation.

Which circuits is this group designed for?
For high-capacity regulated circuits up to 85 kW at ΔT=20 °C: large underfloor heating, radiator branches of large residential and commercial buildings.