07773A DCN6833 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 SO2, NO, NO2, O3, H2S, 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 SO2, NO, NO2, O3, H2S, 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