Globe Valve and an Arrow of Direction

The short answer is yes. If the valve doing something important.

Perfunctory means: performed merely as a routine duty; hasty and superficial:

2.lacking interest, care, or enthusiasm; indifferent

Turn it around!

In addition, installed the wrong-way-around the valve will have the crown packing under pressure when the valve is off--thus more probability of leaks.

good one, once I understood "backwardese".

Arrows cost money to manufacture and fit correctly onto the valve so it probably does matter.....or the arrow comes with every handle regardless of real need or otherwise.

Can the handle be reversed? If so then it probably isn't critical, if not then it most likely matters for the very good reasons already posted.

Do you have an identical spare that you could examine to determine whether or not it matters which way the flow should be?

Who knows, there may even be a manufacturer's name and a part number or other description emblazoned on it.....?

How hard is it to turn around? Was the perfunctory installation executed without unions or other deficiencies that render it difficult/impossible to non destructively remove for service?

This is about a globe valve, rather than a butterfly or ball valve....

Right you are. Yes it really matters.

I still wouldn't mind knowing why OP needs reversibility (can be installed ass about) as an acceptable attribute though...

How hard could it be to make it right?

The valve should be installed as per the arrow direction only. Globe valves may operate in partially open condition and the reverse flow may damage seat , plug.

That is not the whole story. Please see several preceding posts.

Unfortunately you did not describe your process or identify the valve manufacturer. Therefore, I assume this is a process control valve, the service is gas, and the valve body is a Fisher type 'E'.

Sound familiar ? If so then the valve may be fitted with a 'whisper' trim cage (a valve cage to attenuate noise/ prevent cavitation), and in such case, the valve is supposed to be fitted into the line against the direction-of-flow in the pipe.

The subject is too broad to elaborate on here, but if the above describes your valve, then leave it as is (ie the 'wrong way around')

Of course the arrow is there for a reason. On valves where direction is not an issue, there is no arrow. If your wrench turners (craftspeople) do not understand this simple fact, you need new people!

Globe Valves are to be fitted so that the spindle and the spindle gland packing are not pressurized with the Valve in the closed position. This is done so that the normal on-line maintenance of spindle gland replacement can be done even with the underside of the valve seat pressurized as long as the Globe Valve is shut for this replacement.

Hence the Globe Valve is recommended to be installed with the flow following the path of the arrow embossed on the Valve casting.

The first paragraph is correct, but the second paragraph doesn't necessarily follow from the first.

Dear IvanPeeler,

Several CR4 members have shared their experience and knowledge.

If arrow direction not followed means, the up streme pressure will act on the back side of the seat and bonnet and the gland may fail because of pressure.

While the valve is open, the wire drawing effect will be taking place.

DHAYANANDHAN.S

It is rather heartening to note that a topic is alive even after a lapse of a few years. That means our forum is used as a reference by many.

yes. The valve should be in the right direction as per the arrow normally shown on the body. Then only the gland is not always under pressure.

then again, if the check nut for the clack works loose, the flow of fluid continues.