Thanks Hacksaw,
I picked it up out of a P & ID. It is being shown in between a gas filter/coalescer vessel and a ball valve, at the inlet , outlet and vent connections. I have never seen one called out before on a gas filtration vessel. How does it work? how is this more efficient than a ball...
Can anyone please advise on the theory behind the use of a "Figure 8 blind" in front of a 10"-300# ball valve. This is a natural gas filtration application