Flow direction in the needle valves
Flow direction in the needle valves
(OP)
Hi!
Usually the manufacturers indicate on the needle valves the direction of flow which must follow the fluid.
Generally, the fluid is conveyed from under the shutter, passes into the chamber of the bonnet and then exit.
But can the needle valves be used in the opposite direction? What there may be any negative impact using on the contrary?
I cannot find any real indication about this question from the manufacturers.
Thanks and regards
Daniel
Usually the manufacturers indicate on the needle valves the direction of flow which must follow the fluid.
Generally, the fluid is conveyed from under the shutter, passes into the chamber of the bonnet and then exit.
But can the needle valves be used in the opposite direction? What there may be any negative impact using on the contrary?
I cannot find any real indication about this question from the manufacturers.
Thanks and regards
Daniel





RE: Flow direction in the needle valves
Some Globe Valve manufacturers advise NOT installing a Globe Valve backwards because in the closed position the higher pressure fluid is on the top (or stem side) of the disc. This has the High pressure fluid (or Gas) against the Packing (around the Stem) and will cause leaks faster/sooner than when installed in the conventional manner.
Sometimes its possible to do all the right things and still get bad results
RE: Flow direction in the needle valves
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Flow direction in the needle valves
RE: Flow direction in the needle valves
RE: Flow direction in the needle valves
Depending on pressure, fluid, flow and type/quality and fabricationreverse flow is OK(and allowed by manufacturor) for some type of NOTE standard types of needle valves.
RE: Flow direction in the needle valves
RE: Flow direction in the needle valves