Pump group Termojet (with thermostatic valve) PG-36

The pump group with thermostatic valve NG-36 is a pre-assembled Termojet unit for heating circuits that require automatic maintenance of heat carrier temperature without separate boiler room automation. The three-way thermostatic valve regulates supply by blending return flow, ensuring a stable thermal regime and protecting the floor from overheating.

Operating principle: as soon as the temperature in the supply line exceeds the set limits, the thermostatic valve blends cooled heat carrier from the return line — this process occurs mechanically, without electrical power. Isolation valves with thermometers 0–120 °C on supply and return allow the actual operating mode to be monitored and the circuit to be isolated for maintenance without draining the system. The built-in check valve prevents parasitic circulation between adjacent branches.

Areas of application: low-temperature underfloor heating, radiator heating with limited supply temperature, circuits from solid-fuel and gas boilers connected via the distribution BOX2 module with thermal insulation. NG-36 is also suitable for low-temperature systems with a heat pump — see Termojet heat pumps.

Advantages of the Termojet NG-36 pump group:

• complete factory readiness: thermostatic valve, isolation valves, thermometers and check valve assembled and tested at the factory;
• mechanical regulation — reliable operation without electronics and additional configuration;
• 1″ BSP connection — the standard for most modular systems in the Termojet BOX series;
• manufactured in Ukraine, available from stock, official manufacturer's warranty.

Technical specifications: connection 1″ BSP, DN 25, maximum capacity 20 kW at ΔT=10 °C and 40 kW at ΔT=20 °C, Kvs 2,5 m³/h, pump installation length 130 mm, working pressure up to 10 bar, maximum heat carrier temperature 110 °C. The pump is not included — select a circulating pump of the appropriate size with an installation length of 130 mm.

The full range of pump groups in the Termojet BOX series is in the Termojet BOX catalogue.

Frequently asked questions

Is the pump included with NG-36?
No. The pump is purchased separately; installation length — 130 mm. Choose a circulating pump of the appropriate size for your circuit parameters.

What is the difference between NG-36 and the pump group with mixer NG-38?
NG-36 has a thermostatic valve with a fixed mechanical control range — a simpler and less expensive solution. NG-38 with a mixing unit offers broader functionality for regulated circuits with external control.