The 491M-PB Module (photo) is used with 491M Modular Gas Standards Generators to maintain steady gas pressures within the unit and balance the vent backpressure to the delivery system pressure. By using a continuous flow of mixture at controlled temperature and steady pressure, equilibration of the concentration on transport system surfaces is allowed to minimize the adsorption effect of trace concentrations of reactive gases. The 491M-PB eliminates concentration fluctuations by providing a stable reference pressure for all of the mixture flow paths. This reference pressure is balanced to the system operating pressure to ensure stable delivery concentration even during operating mode changes in the 491M Standards Generator or the analytical system under test. — Kin-Tek Laboratories, Inc., La Marque, Tex.
Maintain steady gas pressures at trace amounts of reactive gases
| By Chemical Engineering