Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 163
563. PUMP WATER PRESSUREREGULATING VALVE.—A balancedpiston valve, with a differential balance byspring or lever and weight, is placed onthe steam pipe to a pump. The openingbeneath the lower piston is connected tothe water discharge pipe of the pump.Over-pressure raises the disc and shuts offsteam. … 564. HYDRAULIC PRESS, with screwadjustment of upper platen. The closingdown of the upper platen is quickly done bythe screw, when a small movement of the hv-draulic piston is required for the pressure.
Mechanical movements
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