use of air for valve activation in solvent room
use of air for valve activation in solvent room
(OP)
Good morning everyone,
does anybody know if the use of compressed air, for activating diaphragm valves, in a solvent room is somehow regulated?
Typically, we'd use compressed air for diaphragm valves, but in a solvent room, we might want to use nitrogen instead, to avoid a mixture of air with flammable liquids, in case of diaphragm leaks.
Thoughts?
does anybody know if the use of compressed air, for activating diaphragm valves, in a solvent room is somehow regulated?
Typically, we'd use compressed air for diaphragm valves, but in a solvent room, we might want to use nitrogen instead, to avoid a mixture of air with flammable liquids, in case of diaphragm leaks.
Thoughts?
Process - Piping
ing - EiT





RE: use of air for valve activation in solvent room
RE: use of air for valve activation in solvent room
But your comment is helpful anyway! Thanks!
Process - Piping
ing - EiT
RE: use of air for valve activation in solvent room
RE: use of air for valve activation in solvent room
Pumps are used in solvent dispense modules, and yes the rooms, and modules are ventilated.
Concern with using air: possibility of mixture of air with flammable liquids, in case of diaphragm leaks. One major semiconductor manufacturer uses nitrogen to avoid this.
We are wondering if this could be a code requirement..
Process - Piping
ing - EiT
RE: use of air for valve activation in solvent room
The use of air or nitrogen is not an issue from a code standpoint. Under the NEC pnuematic equipment is one means of complying with the HAZLOC requirements, and I prefer it given the number of times I've seen it improperly installed by commerical electricians who have limited experience.
Now if your dealing with something funky that can exhibit pyrophoric characteristics (you indicated semiconductor), or other organomettalics, then I would recommend N2.