Air pressure to Operate Flangers/Spreaders

We believe the K-36 cross compound pumps are capable of pumping to 150 psi, not sure of the single pumps used on the C classes. How much air pressure is stored in the Air reservoir on the Locomotive (both C and K class) and how much is used to operate the blades on the drag Flangers? What kind of valve is used to control the blade(ball or globe etc), where is it usually located in the cab and is it regulated in any way or does the flanger get all its got? Also does the Jordon Spreader get it's reservoir filled to the same pressure as the locomotive? Thanks in advance for any information.
Terry Rider