07773B DCN6940
9
1
INTRODUCTION
1.1 Preface
The 751H is an excellent source of clean, dry air for dilution calibrators. It also may be
used as a source of purge air for permeation tube ovens, zero air for ozone generators,
or combustion air for FID analyzers. The 751H has an oil-free and diaphragm-free
pump that pushes air through a pre-cooler and water trap that removes moisture, and
passes the air through a regenerative, heatless dryer for final drying. The pump then
routes the dry air through multiple scrubbers that remove SO
2
, NO, NO
2
, O
3
, H
2
S, CO,
and Hydrocarbons; the outlet air passes through a final filter to assure a clean, dry,
analytical zero air supply.
The regenerative dryer removes water and produces gas with a dewpoint of less than
-20°C (up to 10 SLPM flow rate) independent of the inlet dewpoint, and assists in the
removal of other gases, greatly increasing the life of the chemical scrubbers. The 751H
is an ideal accessory to the Model T700 Mass Flow Calibrator or Model 702 Single
Point Calibrator as a zero air source for analyzers.
1.2
751H Features
•
Regenerative, heatless dryer for maintenance-free water removal independent of
inlet dewpoint
•
Long life scrubbers for SO
2
, NO, NO
2
, O
3
, H
2
S, CO, and Hydrocarbons
•
Automatic water drain
•
May be used to provide combustion air for FID
•
Source of purge air for permeation tube ovens
•
Source of zero air for Ozone Generators
Summary of Contents for 751H
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