Welker Engineering Pte. Ltd. Product Catalog 2002
Control ValvesGas ProductsInstrument Regulators/Filters and Filter dryersLight Liquid Samplers
CylindersCrude Oil SamplersInjection SystemsMiscellaneous
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Instrument Regulators/
    Filters and Filter dryers
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Technical Data
Analyzer Liquid Shut-Off
Purpose
The purpose of the ALS is to prevent liquids from getting into analytical instruments.

Installation
The ALS is installed vertically in the analyzer flow line between the supply source and the analyzer.
Purging of liquids from the line should be considered at this time.

Operation
In normal operation, the conditioned sample flows from the probe regulator through the sampling system to the analyzer.
When liquids reach the ALS, the ball will float to the top and shut off flow to the analyzer. This can be visually observed lay noting the position of the ball in the sight glass. When the ALS shuts off the flow of gas to the analyzer, the sample line must be purged (blown out) to eliminate accumulated liquid from causing further interruptions.
The line may be purged with N2, He or Natural Gas from the pipeline, if you can insure that the gas will
be dry and not add to the contamination. The most effective purge is completed with dry gas, such as
helium, that will remove the contaminates and dry the line.

ALS-1 Stainless Steel Construction, 1/8" inlet and outlet
1000 psi w.p. Weight 15.5 oz

ALS-2 Aluminum Construction, 1/8" inlet and outlet
300 psi w.p. Weight ... 6.70 oz

Welker Liquid Eliminator
The Welker Liquid Eliminator Membrane Filter is designed to be installed in analyzer sample lines to effectively eliminate free liquids from entering gas analyzers.

LE-2D Delrin construction, w.p. 300 psi, 1/4" inlet and outlets, weight ... 12Oz
LE-2A Aluminum construction, w.p. 1000 psi, 1/4" inlet and outlets, weight ... 1.50 Ibs
LE-2S Stainless Steel construction, w.p. 1440 psi, 1/4" inlet and outlets, weight ... 3.10 Ibs
FE090OO ... Replacement Membrane


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