Pump group Termojet with mixer 1" FT in thermal insulation without pump PG-48L

Pump group with mixer NG-48 L — a pre-assembled Termojet unit 1″ female thread for circuits requiring heat carrier temperature control with boiler room automation. Three-way valve with electric actuator 220 V included; "L" version — supply line on the left.

Operating principle: the boiler room automation sends a signal to the actuator, which rotates the three-way mixing valve and blends cooled return water into the supply — the circuit receives exactly the temperature set by the controller. This is the basis of weather-compensated control: the supply temperature changes smoothly in response to outdoor temperature. Valves with 0–120 °C thermometers on the supply and return lines show the actual operating mode; the built-in check valve prevents parasitic circulation between circuits.

Applications: underfloor heating circuit, radiator heating with variable supply temperature, multi-circuit boiler rooms with a controller. In low-temperature systems with a heat pump, the group accurately maintains the underfloor heating curve — see Termojet heat pumps. Actuator control is conveniently implemented via Termojet LIGHT boiler room automation; the group mounts on the distribution manifold K22V.125 with 125 mm centre-to-centre spacing; for manifolds with 1¼″ outlets — via adapter KP 125/150.

Advantages of NG-48 L from Termojet:

• three-way valve with 220 V actuator included — ready to work with automation;
• complete factory assembly: shutoff valves, thermometers, check valve, thermal insulation casing;
• union nut connections on supply and return — fast installation and maintenance without welding;
• Ukrainian manufacture: no import mark-up on price, availability, manufacturer's warranty.

Technical specifications: maximum output 20 kW at ΔT=10 °C and 40 kW at ΔT=20 °C, Kvs 6.3 m³/h, connection to manifold and circuit — 1″, working pressure up to 3 bar, dimensions 353×261 mm, volume 0.34 l. Pump installation length — 130 mm; pump purchased separately — the Termojet APE 25-60 pump (130 mm) is suitable.

Models with thermostatic valve and straight groups — in the Termojet pump groups catalogue.

Frequently Asked Questions

How does NG-48 differ from the group with a thermostatic valve?
Instead of a thermostatic head, this unit features a 220 V electric actuator: the supply temperature is set by the boiler room automation, enabling weather-compensated control.

Is the circulation pump included?
No, the pump is purchased separately. Installation length — 130 mm; the Termojet APE 25-60 (130 mm) is the optimal choice.