Before starting the pump, the pump and the inlet pipe are filled with water. After the pump is running, the water in the impeller flow channel is thrown out to the surrounding by the centrifugal force generated by the rotation of the impeller at high speed, and the water is pressed into the volute to form a vacuum at the inlet of the impeller, The water in the pool replenished this space as it was drawn in along the suction pipe under atmospheric pressure. The inhaled water is then thrown out of the impeller by the volute into the outlet pipe. Thus, if the centrifugal pump impeller constantly rotating, you can continuously absorb water, pressure water, water can continue to rise from low to high or far away. So, the pump can be run in parallel?
  
Two or more than one pump, to the same pressure pipe or pressure vessel to send fluid work, said the parallel operation. The purpose of parallel operation is to increase the delivery of fluid at the same pressure.
  
Pump parallel operation, in principle, should be the same performance (same model or the same characteristic curve) of the pump, so that after the output fluid in parallel with the pressure head when working alone approach (or slightly higher), the flow is two pumps Of the sum of the traffic, (but the flow of each pump is slightly less than the flow of its separate work).
  
Different performance of the pump parallel work is not absolutely not allowed, but after the parallel pump must work under a common pressure head, then the low head of the pump output flow rate to reduce, or even impossible to send fluid outward, So its parallel effect is not good. Moreover, different performance pumps work in parallel, its operation is more complicated, so the actual production is not to promote different performance pumps work in parallel.
  
Two or more than one pump, to the same pressure pipe or pressure vessel to send fluid work, said the parallel operation. The purpose of parallel operation is to increase the delivery of fluid at the same pressure.
  
Pump parallel operation, in principle, should be the same performance (same model or the same characteristic curve) of the pump, so that after the output fluid in parallel with the pressure head when working alone approach (or slightly higher), the flow is two pumps Of the sum of the traffic, (but the flow of each pump is slightly less than the flow of its separate work).
  
Different performance of the pump parallel work is not absolutely not allowed, but after the parallel pump must work under a common pressure head, then the low head of the pump output flow rate to reduce, or even impossible to send fluid outward, So its parallel effect is not good. Moreover, different performance pumps work in parallel, its operation is more complicated, so the actual production is not to promote different performance pumps work in parallel.
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