Correct Valve Selection

Only the purchaser can determine the preferred valve, as 'to prefer' involves evaluation of criteria against an internal weighting system.

Surely it has standards for this sort of thing (rhetorical question)?

You'll either have to provide much, much more information or make the decision based on your internal engineering evaluation.

You're there, we're not. Wherever "there" is, which you haven't told us either.

Are you on Saturn?

I prefer "Triple Eccentric Butterfly Valve", but only because it sounds cool...

My personal choice would be the the butterfly valve, for reasons of weight, size, price and tight shutoff . However, I wonder what your concern is regarding vibration ?

Since your pressure rating is only 150# and this is only a dump valve (not directly connected to vibrating equipment), I don't foresee a problem at all, unless you have not disclosed all relevant information.

My choice is buterfly valve. With even less than 90 degree turn, it will give maximum flow .

I would think a "V-Ball" would be the most failsafe. You need to calculate C/V you have to deal with delta pressure. If you contact your local Fisher-Governor Rep. they will be glad to help you with valve selection, material, actuator etc.

Good Luck

We have made knife gate valves that were used for this purpose. They have oversized air cylinders with a pressure switch in the lines to trip the valve to open or close. You dont want to get your hand cought in those it would make for a bad day. I have done several of these. The biggest factor is making sure the gate shutting does not destroy the valve, considering the gate is 2-1/4" thick and weighs about 1,500#.

I would choose the ball valve because it presents no impediment to flow when open. My preference is linked to the understanding that in flare knock out drums, use of "internals" is not usually permitted for fear of its clogging/choking the line and resulting in an over-pressure condition. Extending the same philosophy, I lean towards minimizing the "internals" in the flow path.