281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
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Welker ALS-1

The Welker ALS-1 Analyzer Liquid Shutoff prevents any liquid from entering your gas chromatograph, keeping the analyzer columns safe from damage and protecting sensitive equipment from costly repairs.


Protection You Can Trust

Fail-safe shutoff optimizes profitability by protecting sensitive equipment from damage caused by liquid.

Sight Port

See The Difference

Sight glass provides instant visual confirmation of flow status.

ALS-1 Sight Glass


Corrosion-resistant material needs only minimal maintenance. No tools are required to disassemble the ALS-1.


ALS-1 Automatic Liquid Shutoff
Materials of Construction316/316L Stainless Steel, Glass, LEXAN™, Teflon®, Viton®
Inlet Connection1/8" FNPT
Outlet Connection1/8" FNPT
Operating Pressure1000 psig @ -20 °F to 120 °F
Product CertificationNACE Compliance