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Laing D5/710B PV Circulating Pump- threaded

Laing D5/710B PV Circulating Pump- threaded
Laing D5/710B PV Circulating Pump- threaded
Item code Model number Voltage Type
LAI-D5SOLAR710B D5 Solar/710 B DC
The only difference between the 710B and the 720 is the porting. On the model 720B sweated ports are provided, while the model 710B is supplied with 1/2" female NPT threads.

Laing D5 Ecocirc
PV-Direct Solar Circulating Pumps
D5 Solar/710 B, D5 Solar/720 B, D5 Solar/090 B

The first DC spherical motor pump for direct connection to photovoltaic panels with automatic performance optimization using MPPT technology (Maximum Power Point Tracking)


The Ecocirc solar pump can be used wherever a highly efficient circulation pump is needed without a direct connection to AC power. It can be connected directly to a photovoltaic panel and is characterized by its small size, high efficiency, very low power consumption and its MPP tracking. The shaftless spherical motor technology enables a long, maintenance free and quiet service life. Areas of application are thermal solar systems for single family homes.

Laing ecocirc solar water pump
The principle of the spherical motor, which was invented by Laing, is fundamentally different from conventional canned motor pumps. The only moving part in a spherical motor is a hemispherical rotor/impeller unit, which sits on an ultra-hard, wear-resistant ceramic ball. There are no conventional shaft bearings or seals. This rules out, in effect, the possibility of play in the bearings and the increase in noise associated with it. These pumps are particularly robust and give exceptionally long service. The self-realigning bearing is lubricated and cooled by the media. Maintenance is not necessary under normal conditions and even after lengthy shutdown periods a reliable start-up is virtually guaranteed. The parts exposed to the fluid are completely corrosion resistant. Laing ecocirc solar water pump

Soft start-up
The pump has been programmed for a soft start-up. When the photovoltaic panel provides sufficient power, the pump first goes through the alignment phase, turning the rotor into the position required for start-up. Then the processor waits until the built-in capacitor has recharged sufficiently. This enables a start-up with minimal power (less than one Watt!). Cycling due to unsuccessful starting attempts is minimized. Even after prolonged shutdown, the pump will start reliably.

Automatic performance optimization – MPP tracking
The Ecocirc DC pumps are the first and only spherical motor pumps with self-optimizing software (see diagram). Every three seconds, the processor will modify its operating point on the voltage-current curve of the PV panel to find the point of maximum performance. This is called the “Maximum Power Point” (MPP).

At this point, the pump achieves the maximum rpm and therefore the maximum performance. There is no need for a separate performance adaptation, the pump will always find its best operating point under any given light and temperature conditions by itself.

(Curves for the model 710B and model 720B are the same.)

Laing Thermotech, Inc. (Laing) warrants that Laing pumps shall be free from defects in materials and workmanship for a period of twenty-four (24) months from the date of manufacture or twelve (12) months from the date of user purchase (with proof of purchase), which ever is later.

Laing Ecocirc
Laing D5 Solar Pump
Laing D5 Solar Pump









Laing D5 solar pumps


I've been using two Laing D5/090B pumps for several years, and they have run trouble-free circulating hot propylene glycol solution in a solar radiant heat floor application. However, the /090 does not move quite enough fluid (even with the check va
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Pool circulation


I use this pump to circulate pool water over a waterfall. It keeps water in motion all day and enables chlorination. It is very effective and easy to rig up. I may want to order a larger pump in the future.

Good & Bas all in one


This pump works great, BUT Dont ever let get the smallest leak in the tubing where a small drip can travel down the side and then gets inside the motor very easily. It will short it out. It seems the seal on these pumps dont seal a thing. When you ca
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