Located on the lower right side of each SmartBob AO is a 1/4” NPT air fitting. This fitting can
be used to connect an external source of dry, clean air or noncombustible gas to the remote
housing. By adding pressure to the remote housing that is slightly greater than that in the vessel,
material and dust from the vessel is prevented from entering into the unit. The external pressure
should be one (1) psi greater than the ambient pressure in the storage vessel and should be free
from moisture and other contaminates.
SmartBob Air Purge - How many PSI?
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