Labconco Rapid Digestor Fume Removal System 2354000 - Manual (Page 5)

INTRODUCTION
5
General Description
The Labconco Fume Removal Systems are designed to remove corrosive fumes produced
when performing Kjeldahl digestions utilizing either the Labconco’s Rapid Digestors or
Block Digestors having a 20 digestion tube configuration. Models 23500-25 and 23540 are
used with Labconco’s Rapid Digestors, whereas, Model 23500-20 is used with the 20 place
block digestor systems. Fumes from a digestion are removed from the digestion tubes
through the exhaust manifold by a water jet eductor, which empties into a convenient drain.
Detailed Operation Function
The Labconco fume Removal System consists of the exhaust manifold, water jet
eductor, stand for exhaust manifold, and drip pan. Model 23540 fume removal system for
the 4-place digestor does not include jet eductor, stand, or drip pan.
Exhaust Manifold
The manifold consists of the glass removal system contained in aluminum, stainless
steel on the 4-place system housing. All aluminum parts are finished by a chemically etched
process to withstand corrosion. The glass manifold has either four, twenty, or twenty-five
bulbs, depending on model number that fit directly into the digestor tubes providing fume
removal. The glass manifold pipes are interchangeable and can be replaced in case of
breakage. High temperature acid resistant hose is provided for the connection from the glass
manifold to the water jet eductor.
Water Jet Eductor – Not applicable to Model #23540
The Water Jet Eductor is made of an acid resistant material to assure long life and
trouble free operation. The movement of water through the eductor creates a vacuum that
exhausts the fumes collected by the exhaust manifold. The amount of water flow required is
usually in the range of 2-3 gallons/minute. The amount of vacuum required from the water
eductor is controlled by the adjustment of the water flow rate.
Stand and Drip Pan – Not applicable to Model #23540
The stand is designed to hold the exhaust manifold when not in use. The drip pan is
placed under the stand to catch any acid drippings. Each is finished with an acid resistant
coating to assure long life and good appearance.