Mechanical movements, powers, devices and appliances; (1903)
Hiscox, Gardner Dexter, 1822?-1908 · New York, The N.W. Henley & co. · leaf 123
417. AUTOMATIC RELIEF VALVE.—Thevalve is kept closed by a crank attachment to thespindle and Aveighted lever outside. Excess of press-ure raises the stem and discs, throttling the passageof steam and relieving the back pressure. … 418. HORIZONTAL SWING CHECK\ALVE.—The disc is loose in the swingframe and may be reground tight by a socketwrench passed through the plug opening.
Mechanical movements
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