A flow control valve determines the required flow rate for the fluid in a pipe. 


  1. Open the Set Control Data dialog as described in the previous section.


  1. Click the flow control valve (FCV) radio button.


  1. Type the name of the flow control valve in the Control Name field.


  1. Select the appropriate units of flow from the drop down list.


  1. Type the required flow rate for the fluid in the pipe in the Set Flow field.


  1. Enter the allowable differential pressure range for the valve operation if appropriate.


  1. Click OK to add the flow control valve to the pipe.


NOTE: The flow control valve (FCV) introduces an additional pressure loss in the pipe to control the flow to the value specified by the user. The additional pressure loss is reported in the results tables.


Using the flow rate and the additional pressure loss the user can calculate the Cv or Kv value for a suitable valve which will allow the flow to be controlled at the required flow rate.


The flow control valve (FCV) cannot introduce a negative pressure loss. The FCV would need to act as pump to add pressure, which it cannot do. If this situation is encountered when a system is analyzed it will not be possible to identify a valid solution. The flow control valve setting will have to be amended or the flow control valve may have to be removed to allow a solution to be calculated.