In this article we will talk about the circulation pump, why it is important and what circulation pumps are used for..
In this article we will talk about the circulation pump, why it is important and what circulation pumps are used for..
Further). Visit www.statesupply.com or call us toll free at 877-775-7705 for unparalleled product selection, knowledgeable experts and exceptional customer service..
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Circulation pumps come in many shapes, colors, and sizes, but they generally look like these.
These pumps are in-line centrifugal type pumps, which means they are in line between the inlet and outlet and the method of moving the water is through centrifugal forces.
We will find these pumps used to circulate hot water through a hot water circuit. In this way, when we open a tab we have hot water almost instantly, otherwise every time we open a tap we would have to wait for the hot water to flow throughout the system. In hydronic heating systems we will also find these pumps used to circulate heated water between boilers and radiators or any other type of heat exchangers. We can also find circulation pumps used in large heating systems to provide heat to different parts or areas of a building.
So how does the circulation pump work?
First, the water enters the pump through the inlet and enters the eye of the impeller. The water will be trapped between the impeller vanes inside the pump casing. Electricity enters the terminal box and flows through the motor windings, the capacitor helps create a rotating magnetic field and this rotating magnetic field forces the rotor to rotate. Attached to the rotor is the shaft. The shaft runs from the motor to the pump casing where it connects to the impeller. When the rotor turns, the shaft and the wheel also turn. As the wheel turns, it imparts kinetic energy or velocity to the water, and the water moves outward. By the time the water reaches the edge of the wheel, it has reached a very high velocity. This high velocity water flows from the impeller into the volute where it strikes the wall of the pump casing, this impact converts the velocity into potential energy or pressure. As the water moves out and out of the wheel it will create a region of low pressure in the center which draws in more water and thus a flow develops. The volute channel has an expanding diameter as it wraps around the circumference of the pump body. As it increases, the velocity of the water decreases. This results in an increase in pressure, so the expanding channel allows more water to continue to bind and convert to pressure. Therefore, the discharge outlet is at a higher pressure than the suction inlet. The high pressure at the outlet allows us to force the flow of water through the pipe and get it out where and when it is needed..
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