Answer / visakh

u can see a arrow on valve body

Answer / goerge mathews

You can always look after the arrow mark on the valve ,
bcos in my understand we can find this in any kind of
valve which tell the direction of the flow.

Answer / minesh

First of all see the flow direction arrow on the control
valve body, if you didnt find,check the orifice name plate
(in which side write d & D and some data) its up stream.its
can help you. (as genral parctice tansmitter should be in
up stream, some time it can very on process demand)

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