Suitable Valve type

You'll probably have to use a refractory lined valve for this service. Here are a few links to some companies that may be able to offer a suitable piece of equipment.


That being said, hot gas bypasses are bad for sulfur recovery in your Claus plant. Using hot gas bypass for the first reheat isn't terrible because the bypassed stream will still see all of your catalytic converters, but you do lose the chance to condense some of the elemental sulfur formed in your reaction furnace so the equilibrium in your first converter will not be quite as good as it could be. If you're using hot gas bypass for the second, or third if you have one, reheats you're taking a pretty big hit on maximum achievable sulfur recovery since you'll be bypassing equilibrium stages. If possible, I'd suggest pursuing another reheat method.

Good luck.