Journal . inked up, and on the connectingpipe is a cock which is worked by hand. Turning the cock so asto connect B with the suction main, causes the intermediate tankB to be filled. After the completion of this operation, by a re-verse movement, the high pressure is connected to B and the 102 PNEUMATIC HANDLING OF LIQUIDS. suction to C ; this causes C to be filled. To empty C it is suffi-cient to reverse the cock and the liquid in it will be forced outunder pressure during which time B will be refilled. When thishand-worked cock is in its intermediate position, neither pressurenor vacuum acts
Journal . inked up, and on the connectingpipe is a cock which is worked by hand. Turning the cock so asto connect B with the suction main, causes the intermediate tankB to be filled. After the completion of this operation, by a re-verse movement, the high pressure is connected to B and the 102 PNEUMATIC HANDLING OF LIQUIDS. suction to C ; this causes C to be filled. To empty C it is suffi-cient to reverse the cock and the liquid in it will be forced outunder pressure during which time B will be refilled. When thishand-worked cock is in its intermediate position, neither pressurenor vacuum acts on the liquids. This type of apparatus possessesall the flexibility and safety of the larger ones. 5. Volumetric Retail Supply Gauges. There are two main types of distributing gauges :—(^4) Constant Volume Supply Gangers. These are composed of two similar gaugers working alter-nately through the operation of reversing gear, either hand or me-chanically driven. This arrangement is shown in Fig. 10. Their. Fig. 10. main characteristics are the accuracy with which the gaugercylinder is bored and the way in which any slight error in itsconstruction is rectified by means of an adjusting device con-sisting of a metal rod passing through a boss in the side of thecylinder. The length of rod which penetrates into the interior isadjusted so as to give the desired volume with great floats which work the gas and liquid valves are not insidethe gauger as in the previously described apparatus, but are inexterior chambers of reduced volume. The result is that anyerror in the level reached by the liquid, either in its upward ordownward movement, causing the valves to operate, only affectsa small quantity of liquid, and such quantity is negligible asregards the whole volume of each gauging. The top and bottom PNEUMATIC HANDLING OF LIQUIDS. 103 floats and the chambers in which they work are identical, con-sequently any variation in the level at which they operate thevalve, due to
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Keywords: ., bookcentury1800, bookdecade186, bookpublisherlondon, bookyear1861
