21
Jul
Boiler Shunt Pump Definition. The heated water gradually cools down as it moves around the system. Location and type of pumps. Boiler shunt for circulating the water between the out- and inlet for the boiler. The primary task of the boiler shunt is to ensure that the difference in temperature between the top and the bottom of the boiler is not too high.
By throttling this valve we create a pressure drop through the common pipe which forces more. This is done to increase the temperature of the return water to a temperature where thermal stress wont cause damage to the boiler. As you can see in Figure 1 there is still a common pipe between the chiller pumps and the system distribution but there are no secondary pumps. These pumps are normally high pressure units that use suction from a condensate return system and can be of the centrifugal pump type or positive displacement type. An inadequate flow rate is not only annoying for the client but can also be costly. On the face of it the life-cycle cost of an additional pump.
Return water in a large system can be considerably cold therefore.
Its sole purpose is to mix up the water in the tank. A destrat pump pumps from the top of the calorifier straight back to the bottom. As you can see in Figure 1 there is still a common pipe between the chiller pumps and the system distribution but there are no secondary pumps. Your pump will have a water flow inlet and an outlet. The primary task of the boiler shunt is to ensure that the difference in temperature between the top and the bottom of the boiler is not too high. The shunt comes complete for mounting on the boiler flanges.