What are the valves required to follow flow direction in oil and gas industry piping?
What are the valves to follow flow direction in piping industry? For example check valve is the non return valve which must be follow flow direction marked on valve. Could you please let me know what are the other valves?
Globe valves can also have a flow direction but it is not always as critical as that of a check valve. Typically the valve should be oriented so the flow comes from under the seat and up and out of the valve body. Some ball valves are designed with a floating ball that depends to some extent on the flow direction (really the differential pressure) to help seal the valve when it is closed.
Minor point but most needle valves are just very small globe valves.
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