Contractors' and Dealers' Association of California · San Francisco : L. A. Larson · leaf 333
Thevacuum system is recommended as it eliminates conden-satioTi or moisture in the pipes. The diaphragm valve is made completely of metal^norubber to deteriorate. This valve closes automatically ifthe system fails,, due to leaks or pump troubles, therebyl)reventing over-heating. The Contrnllir… … Iiii|)i(n*d IMai>lii-a^in Tube Moveiiicut. Fur all low pressure.s below 12 pounds or its equivalentthe improved form of Diaphragm Tube movement is used.The same principle of pen arm construction is carriedout in this nioverment as in the helical tube—the motionbeing transmitted from the…
Architecture · Building · Construction industry · Engineering
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