By Cal Beverly (Editor)
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Extra info for 347 Woodworking Patterns A Bound Set of Popular Woodworking Patterns
1). All of these components add to the total friction loss in the system and define the operating point of flow and pressure for a pump handling a specific fluid at a given speed. 2). Any pump impeller can be reduced to a series of equivalent orifices. 2 Concept of an equivalent orifice being another, and the impeller case wear ring clearances being additional equivalent orifices. It should also be noted that both the suction and discharge process system for a given point in time and flow rate can be thought of as equivalent orifices placed at the suction and discharge flanges of the pump.
13. 13 Single stage inline (Courtesy of Union Pump Co) 16 Pump Types and Applications The advantage of this pump design is that it can be mounted vertically (inline) between pipe flanges and does not require a baseplate. A concrete, grouted support plate however, is strongly recommended. It should be noted that many inline designs do not incorporate bearings in the pump and rely on a rigid coupling to maintain pump and motor shaft alignment. 001". Integral gear centrifugal This type of pump is used for low flow applications requiring high head.
5). Example - multistaging total net system energy (ft. head) - 1200 ft. number of impellers selected - 4 energy (ft. 5 Example - multistaging Flow The flow rate of a centrifugal pump varies inversely with the head (energy) required by the process. For a given impeller design operating at a constant speed, increased process head requirements will reduce centrifugal pump flow rates. Since the typical head rise values for centrifugal pumps are 5% - 15%, a relatively small change in process head requirements can result in significant flow reductions and possible impeller recirculation on operation near zero flow (shutoff).