MODERN STEAM PRACTICE . 154 than 30 feet from the surface of the water in the shaft or pit to be drained , 28 feet being a convenient height ; that is to say , when the water passes through the valve to the top of a solid bücket . But when a hollow bücket is adopted , with the discharge valve… … Fig . 91 . — Forcing Set . Plunger 18 inches in diameter , arranged with one door for each valve . A , Suction pipe . b , Suction - valve seating . c , DeKvery - valve seating . d , Plunger , e , Air valve . f , Stand pipe . g , Stuffing - box piece and gland . suction valve ' then opens , and the…
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