Hawkins, N. (Nehemiah), 1833- · New York : Theo. Audel · leaf 385
om the priming tank to this outlet should be at least 2-inch,and may be of iron, and is to be furnished by the purchaser. All partsfurnished by the pump-maker are to be of brass, and are to be includedin the price of the pump. Controllable Valve Arrangement. 1 c. Four 2-seat controllable valves,… … Fig. 14, Objection has been raised to this double-seated valve from the possibledifficulty of keeping both seats tight. If desired, the valve may be fittedwith a flange instead of a screw connection, and the stem between thetwo seats somewhat enlarged and provided with a suitable spring, thusgiving…
Hydraulic machinery · Pumping machinery
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