First, the centrifugal pump combination 1, Parallel operation Two models of the same pump in parallel, the characteristic curve can be used single pump characteristic curve synthesis, see figure. When the pipeline characteristic curve is unchanged, the flow rate increases in parallel, but less than the sum of two single-pump flow, that is, Q and <2Q single, and H and> H single 2, series operation of two models of the same pump series After its characteristic curve can also be used single pump characteristic curve synthesis, see below. When the pipeline characteristic curve is unchanged, the indenter increases in series, but also less than the sum of two single-head pressure, that is, H series <2H single, and Q and> Q single. 3, the choice of combination If both ends of the pipeline () item value greater than the maximum pressure pump can provide, you must use the series operation. For low resistance type pipeline (that is, the pipeline characteristic curve is relatively flat), the flow and pressure head delivered by the parallel pump are larger than the series pump. For the high resistance type pipeline (that is, the pipeline characteristic curve is relatively steep), the flow and pressure head delivered by the tandem pump are larger than the parallel pump, as shown in the following figure. Centrifugal pump installation and operation Centrifugal pump installation height should be less than the allowable installation height (ie, the calculated installation height), so as to avoid cavitation. In order to reduce the fluid resistance of the suction pipe, the suction pipe diameter should not be less than the diameter of the pump inlet. The suction pipe should be short and straight without a valve. However, when the suction inlet of the pump is higher than the liquid level, a reverse check valve should be added. Centrifugal pump should be noted before starting or stopping: (1) filled with liquid to avoid gas binding; close the outlet valve to reduce the starting power; (2) the outlet valve should be closed before the pump stops; (3) Centrifugal pump operation, the shaft seal should be regularly checked for leaks, bearings, stuffing boxes and other heating conditions, bearings should pay attention to lubrication.
Deep well Plate is an ideal product for sample storage, we have many types of 96 Deep Well Plate, such as 0.5ml elution plate, 1.2ml square well V bottom plate, 2.0ml round well U botttom plate for Hamilton and Nunc machines, 2.2ml square well V bottom and 2.2ml square well U bottom. They can be sterilized under high press, and keep the shape for 20 minutes even the temperature arrives at 121℃,All these characteristics set a new standard for the laboratory.
96 Well Deep Well Plate,2ml Deep Well Plate,Deep Well Microplates,1.2 ml Deep Well Plate,Square Well Plate
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypcrtube.com