The flow characteristics of the diaphragm pump refer to the relationship between the relative flow and displacement (relative opening of the valve) of the relative flow of the valve. The ideal flow characteristics mainly include straight lines, equivalent percentage (pairs), parabolic lines, and fast opening. The commonly used ideal traffic characteristics are only three types: straight line, equivalent percentage (pair), and fast opening. The parabolic line flow characteristics are between straight lines and equal percentages. Generally, equivalent percentage characteristics can be replaced. The fast -opening characteristics are mainly used in two -digit adjustment and program control. Therefore s Choice.

The selection of diaphragm pump flow characteristics can be calculated by theory, but the methods and equations used are complicated. At present, most of the experience guidelines are adopted, and specifically considers the following aspects:

① From the adjustment quality analysis of the regulating system;

② Consider the situation of the process of process;

③ Analysis of changes in load.

Select the flow characteristics of the diaphragm pump, and you can determine the shape and structure of the valve core according to its flow characteristics.