Esbe ARA 661 actuator

▸ Running time 90°: 120 s
▸ Torque: 6 Nm
▸ Power consumption: 5 W
▸ Ambient temp. max: 55°C
▸ Degree of protection: IP 41
▸ Protection class: II

Grundfos UPM3 Hybrid 25-7

The UPM3 HYBRID is the first Grundfos high-efficiency circulator that is suitable for both external and internal control.


These circulators with control panel are designed for various uses such as: e.g.:
* Internally regulated, the pump can be used in heating systems either as an external pump or as a replacement pump, e.g. B. be used in connection groups.
* Externally controlled, the pump can be used in boilers or other heating devices where the pump speed is controlled by a PWM signal.
* As a combination of both variants, use as a universal circulation pump is possible. The internally controlled versions can be used for the following systems:
* Systems with a constant or slightly variable volumetric flow, e.g. B. One-pipe heaters
* Systems with variable volume flow, e.g. B. Two-pipe heating systems with thermostatic valves for radiators or underfloor heating circuits.

In addition, the speed can be controlled by a PWM (pulse width modulation) signal. (externally controlled via PWM profile A/C or internally controlled via PP/CP/CC/AA)


The glandless pump has a ceramic shaft, stainless steel rotor housing, compound impeller, all of which contribute to long service life. The pump is self-priming and has easy control mode selection.
The compact design fits in the most common installations and boilers. The pump and motor form a unit without a shaft seal. This means that the bearings are lubricated by the pumped liquid. This design ensures maintenance-free operation. The pump housing is made of gray cast iron and is electroplated to improve corrosion resistance.

There are up to 5 different control modes and up to 4 control curves each, available in both the 5m and 7m versions of the UPM3 HYBRID.Features:

- 3 constant curves / constant speed
- 3 proportional curves
- 4 constant pressure characteristics with fixed setting of the delivery head (4/5/6 or 7m)
- Radiator (radiator) heating mode
- Floor heating mode
- PWM profile for heating applications
- Energy-optimized, corresponds to the ErP directive
- Unlocking screw on the front for detaching the motor shaft.
- Runs reliably and efficiently even under the most difficult conditions
- Adjustable and flexible built-in connector with two possible cable glands.
- no maintenance required
- Quiet operation
- easy construction

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