GASS-2040 conditions high-flow, high-moisture
samples, eliminating acid mists or ammonia if
present. It processes the toughest samples,
with flows of up to 25 liters per minute and
moisture contents in excess of 50%. The GASS-2040
can be mounted anywhere, including on the stack
flange with an integral stack probe, which eliminates
heated sample lines.
GASS-2040 System Design
GASS-2040 contains three temperature-controlled
zones mounted in an environmentally sealed,
NEMA-4X housing. In the first zone, the sample
passes through a heat exchanger, then through
a coalescing particulate filter to remove particles
down to 0.1 micron. Acid mists, if present,
are coalesced then removed by an automatic drain.
If ammonia is present, a proprietary ammonia
scrubber removes it.
the second zone, the sample passes through a
proprietary Nafion dryer. The initial
portion of the dryer is heated above the sample
dew point to prevent condensation and to create
greater water vapor removal.
the third zone, the sample passes through the
remainder of the dryer, further reducing the
dew point down as low as -25°C, depending
upon dryer model selected and sample flow rate.
The system PLC with optional Ethernet connection
for remote and flow controls for the dryer purge
gas. Optional accessories, if required, such
as a sample pump or pressure-swing air dryer
for the purge air are also mounted here. This
zone operates at ambient temperature so these
controls and accessories do not overheat.
an integral sampling probe is added, the GASS-2040
can be mounted right on the stack flange. The
probe filter and blowback assembly are mounted
inside the GASS-2040, and the system PLC controls
filter temperature and blowback timing. Conditioning
the sample immediately after it leaves the stack
improves its analytical calibration times, saving
2040 System Maintenance Items
check valve, polypropylene, for vacuum
Teflon & glass replacement element
o-ring set, set of 3
2 µ, ceramic filter element for
probe filter, includes gasket