control valves must have following options :
-build as one object
-build as 2 objects (valve and actuator) with two tagnumbers
with option to switch between these.
control valve can be purchased as one object, but can be a valve form manufacturer A and actuator from B
![Autodesk Design & Make Report](https://forums.autodesk.com/t5/image/serverpage/image-id/1350519iCB55845EBFC43016/image-size/large?v=v2&px=999" "Autodesk Design & Make Report")
