Pump group Termojet (with mixer) PG-38

Pump group with mixer NG-38 — adjustable Termojet BOX unit with 1″ FT connection and DN 25 for heating circuits requiring precise supply temperature control. High flow capacity Kvs 6.3 m³/h ensures minimal hydraulic resistance even at high coolant flow rates.

Operating principle: the mixing unit blends cooled return water into the supply line in the quantity required to reach the set temperature. This allows connecting low-temperature circuits to a boiler with a higher supply temperature without risk of overheating. Shut-off valves with 0–120 °C thermometers on both lines monitor the operating mode and allow servicing without draining the system. The built-in check valve prevents parasitic circulation between circuits.

Applications: low-temperature underfloor heating, mixed systems (underfloor + radiators), circuits with adjustable supply temperature from 25 to 55 °C. In heat pump systems, NG-38 maintains precise parameters of the low-temperature circuit — see Termojet heat pumps. The group is conveniently connected to the BOX2 module with thermal insulation — the standard for BOX series pump groups. If simpler mechanical regulation is required, see the NG-36 with thermostatic valve.

Advantages of the Termojet NG-38 pump group:

• mixing unit with wide regulation range — stable circuit temperature regardless of boiler mode;
• high Kvs 6.3 m³/h — minimal hydraulic resistance across the group;
• complete factory assembly: valves, thermometers, check valve — ready-to-install unit;
• manufactured in Ukraine, official manufacturer's warranty.

Technical specifications: connection 1″ FT, DN 25, maximum power 20 kW at ΔT=10 °C and 40 kW at ΔT=20 °C, Kvs 6.3 m³/h, pump installation length 130 mm, working pressure up to 10 bar, maximum coolant temperature 110 °C. Pump sold separately — select a circulation pump with installation length 130 mm.

Full range of BOX series pump groups in the Termojet BOX catalogue.

Frequently Asked Questions

Is the pump included with the NG-38?
No. The pump is purchased separately with an installation length of 130 mm. Select a circulation pump of the appropriate size for your circuit flow rate.

What is the difference between the NG-38 with mixer and the NG-36 with thermostatic valve?
The NG-38 uses a full mixing unit with broader regulation capabilities — suitable for more complex systems and external control. The NG-36 is a simpler and more cost-effective mechanical solution for a fixed temperature range.