1.Pump flow and head of the curve should be no hump running stability curve, from rated flow to zero flow of the lift is rising, the value does not exceed the rated flow of 20%.
2.Pumps in the long-term continuous operation under maximum conditions. Water pump in the design conditions of the parameters to ensure that the maximum operating conditions and flow to ensure that the head.
3.Vertical centrifugal pump in a variety of operating conditions should ensure that the impeller does not occur cavitation phenomenon.
4.Critical speed of the pump For rigid rotors, the pump’s first critical speed should not be less than 125% of the maximum operating speed.
5.Horizontal centrifugal pump rotor and its main rotating parts should be static and dynamic balance test. Static balance accuracy of not less than GB9239 in the G6.3 level, dynamic balance accuracy of not less than GB9239 in the G2.5 level.
6.Abnormal vibration should not occur at any speed within the normal operating range.
7.The pump set is designed by the supplier and provides complete pump information to the purchaser.
8.Centrifugal pumps are provided with removable end caps to allow access to the internal components without moving the motor or the inlet and outlet pipes.
9.Pump inlet and outlet can withstand the stress of the pipeline may be generated without deformation. The allowable range of thrust and torque applied to the pump interface by the power plant piping is provided by the supplier.
10.All impellers shall be made of one integral casting.
11.Pump seal should be easy to disassemble, and can effectively prevent too much leakage between the pressure level to ensure high efficiency.
12.Base can withstand the weight of each component and the power of transmission.
