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3.5 NITROGEN PIPING CONNECTION -
The final nitrogen connection is made into a
½”
NPT (F)
bulkhead connection on the utility end (back) of cabinet. No other check valves are required or
recommended beyond this point. An isolation ball valve is provided for field installation by others.
3.6 PERMEATE GAS CONNECTION -
A 1” NPT (F) connection has been provided to pipe permeate
(waste gases) away from the machine. (Refer to section 2.3 Combustion.) Note: If piped away from unit,
use a minimum size of 1”. For each ten (10) feet of piping, increase one pipe size with no more than 50
feet in length is recommended to prevent back pressure. Back pressure to the membranes will reduce their
performance.
3.7
COMPRESSOR RECIRCULATION CONNECTION –
On optional High-Purity Systems a 1” NPT (F)
connection has been provided to pipe the waste gas from the second membrane or set of membranes, which
are connected in series. This line can be connected to the intake of a dedicated feed compressor to improve
nitrogen generator efficiency. This line will contain 90-95% nitrogen. (Please refer to Section 2.2
Breathing) If not used with dedicated compressor, and the area is not ventilated well, this line should be
connected with the permeate line and discharged from the area.
3.8 COMPRESSED AIR INLET CONNECTION
– A 1” NPT(F) connection is provided for the feed
air inlet. An isolation ball valve is provided for field installation by others.
3.9 NITROGEN TANK CONNECTION
– A ¼” NPT(F) connection is provided for connection to the
nitrogen tank downstream of the nitrogen generator. This is to check purity in systems with oxygen
analyzers, and for sensing system pressure on systems with booster compressors.
3.10 ELECTRICAL SUPPLY CONNECTION
– A ½” NPT(F) connection is provided with flexible
conduit to the control box.
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