Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 125
416. FLANGED EXPANSION JOINT.—Used in pipe lines to take up the change inlength due to difference in temperature. 114 STEAM APPLIANCES. … 417. AUTOMATIC RELIEF VALVE.—Thevalve is kept closed by a crank attachment to thespindle and weighted lever outside. Excess of press-ure raises the stem and discs, throttling the passageof steam and relieving the back pressure.
Mechanical movements
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