For our project, we decided to go with the large pumps. Now we've asked ourselves what are the best fitting valves for them. In the following, I would like to ask some questions related to the calculation of airflow and pressure.
On the page of the pump is stated, that they provide a pressure of 130 KPA and an Air Flow of 6 l/min. For the sake of clarification: I use the values from the upper table on the page since the values in the lower image are deviating for some reason. For the valves the C (0.5 W, 0.3 MPa, Cv-factor: 0.016) and D (0.5W, 0.5 MPa, Cv-factor: 0.011) versions are the most interesting. Now I want to know which provides the highest pressure and the highest flow rates. Since the pump only delivers 130 KPA the valves are not the limiting factor and we can say, that 130 KPA is the maximum pressure. In the valve's datasheet in the table of Flow Specifications/Response Times is stated that C (the airflow?) is 0.060 [dm³/(s*bar)] for the C-valves and for 0.042 [dm³/(s*bar)] for the D-valves. Is it now correct to calculate the maximum airflow by using the 130 KPA (= 1.3 bar) from the pump as follows:
C: 0.060 * 1.3 bar = 0,0780 dm³ / secondD: 0.042 * 1.3 bar = 0,0546 dm³ / second
If these calculations are correct I would assume that the C valves would provide a greater airflow.
If I'm messing up things here totally, maybe someone could provide me a good source that helps to understand how to calculate pressure and airflow for a given pump and valve.