The dual gas supply tee, complete with check valves, connects to the gas inlet on the back of the flowmeter and allows for the simultaneous hookup of the gas hose from cylinder mounting block and the outlet station from your central gas supply system or large cylinders.
Revision date indicates the date the MSDS or SDS was last revised. MSDS / SDS are
dated when they are originally issued AND when any significant change has been made
to the chemical compound or research has revealed a health or physical hazard different
from what was originally stated.