A Circulator Is Like a Ferris Wheel

Once the system completely filled with water, all the circulator has to do is move it around. It helps to think of a heating system as a Ferris wheel. When a Ferris wheel turns, the weight going up balances the weight coming down. There’s no lifting going on here, there’s only turning. That’s because everything is in perfect balance. The Ferris wheel’s motor doesn’t have to do any lifting. All it has to do is overcome the friction in the bearings (and in the air, of course) to set the big wheel in motion.

We use the term "Pump Head" to describe the force the circulator develops to overcome pressure drop. When we work with closed hot water heating systems, "Pump Head" has nothing to do with the height of the building. It has only to do with the circulator’s ability to overcome friction. That’s because the system is completely filled with water. Height, as far as the circulator is concerned, doesn’t exist. The circulator doesn’t know (or care!) if the building is 100 feet high and ten feet wide, or ten feet high and 100 feet wide. All it knows is friction.
Static pressure has nothing to do with the number of fittings and valves or the width of the building’s piping network. Static pressure has only to do with gravity, and the weight of the column of water.
"Pump Head," on the other hand, has a lot to do with the number of fittings or valves and the size of the building’s piping network. But it has nothing to do with gravity or the fill pressure of the system.

The water has to squeeze through this smaller opening to get out of the volute. The effect you get is similar to what happens when you put your thumb over the end of a garden hose. The velocity increases, doesn’t it? Well, that velocity is the force that moves the water around the system’s pressure drop. Remember, there’s no lifting going on here, nor pulling or pushing either. Circulators turn the water, just like a big Ferris wheel.

Electro Boiler with WarmFlow technology

The Electro Boilers are 100% efficient and the price per KW/h determines the cost of operation. Most models have a built-in electronic aquastat and WarmFlo technology.
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