Pressure Regulator used to supply gas pressure to the Reagent bottles in the ABI 3900.
The 3900 uses only one regulator to set the pressure for all reagents even though there are 3 pressure gauges on the front of the instrument to indicate the pressure for each set of reagents, there is only one regulator. This regulator is located inside the right hand side door. It is made by Go so you may see a Go label on it. It is made of rass. Some have a gauge on it and some do not. This part is sold without any fittings or gauges. The user must transfer the fittings and gauge from the old regulator.