. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. SPRAYS AND OTHER MEANS OF CONTROL 1897. Fig 14. (9) A sectional view of a globe valve, showing the abrupt changes of direction the liquid must make and the broad faces of the valve and its seat where sediment is caught when the valve is closed. pass under the lower valve into the tank. When the pressure in the air chamber is lowered, the lower va
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. SPRAYS AND OTHER MEANS OF CONTROL 1897. Fig 14. (9) A sectional view of a globe valve, showing the abrupt changes of direction the liquid must make and the broad faces of the valve and its seat where sediment is caught when the valve is closed. pass under the lower valve into the tank. When the pressure in the air chamber is lowered, the lower valve closes and the upper valve is opened by the solution which is again forced into the air cham- ber. Fig. 10 shows the appearance of this regulator, which is large and heavy in comparison with the relief valves, but it is much superior to any of the other pressure-regulating devices for power sprayers. Tank Fillers Several forms of tank fillers, weighing from 40 to 200 lbs., were furnished with power sprayers of different makes several years ago. The lightest kind were ro- tary pumps which were of large capacity, but these pumps are not long-lived, as they must be run at high speed, and often pump water which is full of grit from ditches or ponds. The jet pump or ejector types of tank fillers are supplanting most of the other kinds, as they have no moving parts to wear out or get out of order, and at the same time are light and convenient. They are operated by the pressure stream from the spray pump, which is forced through a reduced opening into a pro- portionally larger diameter pipe. The expansion of the jet of water creates a vacuum below the jet and lifts water in amounts proportional to the pressure and to the abundance of the supply. The height to which water can be raised de- pends upon the pressure furnished by the pump, and the height of the jet pump above the source of supply. If it is neces- sary to raise the water to greater heights than the ordinary suction hose
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