. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Upon the steady operation of the pump depends the safety and comfort of the engineer, owner and employee, and indirectly of ^ * the success of the business with which the plant is connected. Hence the necessity of acquiring complete knowledge of the operation of a device so important. Pumps now raise, convey and deliver water, beer, molasses,acids, oils, melted lead. Pumps also handle, among the gases,air, ammonia, lighting gas, and oxygen. Pumps are also usedto increase or d
. American stationary engineering; a practical work which begins at the boiler room and takes in the whole power plant. Upon the steady operation of the pump depends the safety and comfort of the engineer, owner and employee, and indirectly of ^ * the success of the business with which the plant is connected. Hence the necessity of acquiring complete knowledge of the operation of a device so important. Pumps now raise, convey and deliver water, beer, molasses,acids, oils, melted lead. Pumps also handle, among the gases,air, ammonia, lighting gas, and oxygen. Pumps are also usedto increase or decrease the pressure of a fluid. Pumps are made in many ways, and defined as rope, chain,diaphram, jet, centrifugal, rotary, oscillating, cylinder. Cylinder pumps are of two classes, single acting and doubleacting. In single acting—in effect is single ended—in doubleacting, the motion of the cylinder in one direction causes aninflow of water and a discharge at the same time, in the other;and on the leturn stroke the action is renewed as the dischargefind befiome? the suction end The pump is thus double 2i6 Maxims and Instructions. STEAM PUMPS. A direct pressure steam pump is one in which the liquid ispressed out by the action of steam upon its surface, withoutthe intervention of a piston. A direct acting steam pump isan engine and pump combined. A cylinder or reciprocating pump is one in which the pistonor plunger, in one direction, causes a partial vacuum, to fillwhich the water rushes in pressed by the air on its head. Note.—A suction valve prevents the return of this wateron the return stroke of the piston, and a discharge valve per-mits the outward passage of the fluid from the pump but notits return thereto or to the reservoir through the suction pipe. The force against which the pump works is gravity or theattraction of the earth which prevents the water from beinglifted. This is shown by the fact that water can be led, ortrailed, an immense distance, limit
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsteamen, bookyear1917
