Hengsheng Product Classification
When designing and arranging pipelines for large-flow gear pumps , the following should be noted:
A. Reasonably choose the pipeline diameter of the gear pump. The pipeline diameter is large. At the same flow rate, the liquid flow speed is small and the resistance loss is small. With the increase of the strap power, the cost and operating costs have increased. Therefore, it should be considered from a technical and economic perspective.
B. The maximum pressure that the discharge pipe and its joints can bear shall be considered.
C. The pipeline layout should be arranged as straight as possible. Minimize the attachments in the pipeline and minimize the length of the pipeline. When it is necessary to turn, the bend radius of the elbow should be 3 to 5 times the diameter of the pipeline. ℃.
D. The discharge side of the large-flow gear pump must be equipped with a valve (ball valve or globe valve) and a check valve. The valve is used to adjust the operating point of the pump, and the check valve can prevent the pump from reversing when the liquid flows backward, and prevent the pump from being hit by water hammer. (When the liquid flows backward, huge reverse pressure will be generated, which will damage the pump)
Second, the determination of the impact of the flow head of the large flow gear pump A. If the minimum, normal and maximum flow has been given in the production process, the maximum flow should be considered.
B. If only normal flow is given in the production process, a certain margin should be considered.
For ns100 large-flow low-lift pumps, the flow margin is 5%; for ns50 small-flow high-head pumps, the flow margin is 10%; for pumps with 50≤ns≤100, the flow margin is also 5%. For pumps with poor and poor operating conditions, the flow margin should be 10%.
C. If the basic data only gives weight flow, it should be converted into volume flow.