Pump group Termojet without mixer 1 1/4" FT in thermal insulation without pump PG-51

Pump group NG-51.150 without mixer — a direct Termojet group of increased size 1¼″ female thread for powerful heating circuits up to 85 kW. This is the solution for boiler rooms where standard 1″ groups are no longer sufficient: the high flow capacity Kvs 16.3 m³/h guarantees low hydraulic resistance even at high flow rates.

The group provides circulation of the heating medium from the heat generator or distribution manifold to the consumer circuit at full supply temperature, without mixing. Valves with 0–120 °C thermometers on supply and return lines allow monitoring of the temperature differential in the circuit, the built-in check valve prevents parasitic circulation, and the thermal insulation casing reduces heat losses of the unit.

Applications: powerful radiator heating, loading the buffer tank of a solid-fuel boiler, heating large-volume DHW boilers, ventilation and pool circuits, cascade boiler rooms. The logical companion for this group is the manifold K42VN.150 for 4+1 circuits with 150 mm centre distance and 1¼″ outlets; hydraulic separation of a powerful system is provided by the hydraulic separator GS-26 1¼″. Mounting the group on the Mega manifold is possible via adapter PNG50/32; KP21.250.150.

Advantages of NG-51.150 from Termojet:

• increased size 1¼″ — up to 85 kW per circuit without excessive flow velocity;
• complete factory equipment: valves, thermometers, check valve, thermal insulation casing;
• union nuts on supply and return — fast installation and service;
• own manufacturing in Ukraine: price without import mark-ups and official warranty.

Technical specifications: maximum capacity 45 kW at ΔT=10 °C and 85 kW at ΔT=20 °C, Kvs 16.3 m³/h, connection to manifold and circuit — 1¼″, working pressure up to 6 bar, dimensions 471×296×160 mm, volume 0.9 l. Pump mounting length — 180 mm; pump not included — for high flow rates the Termojet APE 25-60 pump (180 mm) is suitable.

Other sizes of direct groups and models with thermostatic valve — in the Termojet pump group catalogue.

Frequently asked questions

Which pump is suitable for NG-51.150?
A pump with a mounting length of 180 mm. For circuits close to the maximum capacity of the group, we recommend a model with higher head — Termojet APE 25-60.

Which circuits is this group designed for?
For powerful unregulated circuits up to 85 kW at ΔT=20 °C: radiator branches of large buildings, buffer tanks, large-volume DHW boilers, ventilation.