Hi,
I am analyzing a system that consists of three identical centrifugal pumps. I am debating weather the pumps are in parallel because the literature indicates that for a series of pumps to be considered in parallel they would have to share a common suction and a common discharge. This is not my case, the three pumps share the discharge. From the design point of view two pumps should be enough in order to move water from an open tank, however all of them are constantly running in order to keep the level in the tank constant even when the impeller size was increased. Now, I suspect the limiting factor in this case is the discharge pipe. Has anybody ever seen a problem like this, and if so, what’s the best way to try and approach a solution. I should add that we are about to expand our operations and thus we would like to try and add an extra pump, but find if it’s the line what’s causing the restriction.
I've attached a drawing for better undestanding.
I am analyzing a system that consists of three identical centrifugal pumps. I am debating weather the pumps are in parallel because the literature indicates that for a series of pumps to be considered in parallel they would have to share a common suction and a common discharge. This is not my case, the three pumps share the discharge. From the design point of view two pumps should be enough in order to move water from an open tank, however all of them are constantly running in order to keep the level in the tank constant even when the impeller size was increased. Now, I suspect the limiting factor in this case is the discharge pipe. Has anybody ever seen a problem like this, and if so, what’s the best way to try and approach a solution. I should add that we are about to expand our operations and thus we would like to try and add an extra pump, but find if it’s the line what’s causing the restriction.
I've attached a drawing for better undestanding.
