This shows some of the process flow valves that are included in the RFFlow software. They are used to draw process flow diagrams (PFDs) or process and instrument drawings (P&IDs).

If you haven't already done so, first download the free trial version of RFFlow. It will allow you to open any chart and make modifications.

Once RFFlow is installed, you can open the above chart in RFFlow by clicking on process-flow-valves.flo. From there you can zoom in, edit, and print this sample chart. It is often easier to modify an existing chart than to draw it from scratch.

To draw this flow chart without downloading it, run RFFlow, click on the More Shapes button , scroll and open the Industrial Objects folder, click the Valves stencil and click the Add Stencil button.