ST. LOUIS—Potter Electric Signal Co. recently introduced what it says is an industry first: a self-testing flow switch for wet sprinkler systems that requires no discharge of water. Mike Henke, ...
ST. LOUIS—A new Potter Electric Signal Co. study shows that replacing air with nitrogen as the supervisory gas in dry and pre-action sprinkler systems dramatically reduces rust and makes the systems ...
The Model VS-SP is a vane type waterflow switch for use on wet sprinkler systems. These devices may be used as sectional flow indicators on large sprinkler systems and on smaller sprinkler systems ...
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