Pump group Termojet with actuator-controller A-413 1 1/4" FT in thermal insulation without pump PG-52AL.150 L

Pump group NG-52A.150 L with drive-controller A-413 — a Termojet unit of enlarged size 1¼″ female thread for high-capacity circuits requiring automatic coolant temperature control without boiler-room automation. The letter "L" denotes left-hand connection — a mirror-image version for convenient layout; the unit is supplied in a thermal insulation jacket (XPE).

Operating principle: the servo drive-controller A-413 (power supply 230 V, 3-point ON/OFF control, torque 6 Nm, 90° rotation time — 120 seconds, protection class IP42, CE/RoHS certified) rotates the mixing unit and meters the blending of return water into the supply. The circuit temperature is maintained automatically and smoothly — without fixed mechanical setpoints or manual readjustment.

Applications: high-capacity underfloor heating circuits, radiator systems in large buildings, piping of solid-fuel boilers and buffer tanks. The high flow rate Qmax 10.3 m³/h also makes the group suitable for heat pump systems where large flows at low ΔT are standard; see the equipment at the Termojet heat pumps page. For 1″ circuits with the same automation, there is the more compact pump group NG-48A L with drive-controller.

Advantages of NG-52A.150 L from Termojet:

• 1¼″ size — for high-capacity circuits where 1″ groups are no longer sufficient;
• drive-controller A-413 included — automatic control straight out of the box;
• left-hand version and XPE thermal insulation — flexible layout and minimum heat loss;
• manufactured in Ukraine: manufacturer's price, official warranty.

Technical specifications: connection 1¼″ female thread, maximum flow rate Qmax 10.3 m³/h, working pressure up to 6 bar, height 471 mm, width 296 mm. Circulation pump installation length — 180 mm; the pump is not included — we recommend the Termojet APE 25-60 pump (180 mm). Other sizes and versions — in the Termojet pump groups catalogue.

The group is equipped with the drive-controller Termojet A-413 with an integrated temperature sensor — it automatically controls the three-way mixing valve according to the set programme, maintaining a stable supply temperature.

Frequently Asked Questions

What does the "L" in the name mean?
Left-hand connection: the supply and return lines are positioned as a mirror image of the standard version — choose based on your boiler room piping layout.

Is separate automation needed to control the valve?
No, the A-413 is a servo drive with an integrated controller in one housing: the group automatically controls the coolant temperature without boiler-room automation.