Electrochemical and metallurgical industry . LENTRIFtCAI. IlMP. been emptied the air valve is turned off and the enclosed airescapes, whereby the vessel is filled again with a liquid froma higher reservoir through a tube with a suitable valve. Theliquid enters through .\ Fig. 5 shows an improved construe- NovEMHEK. laJ-XTROCHEMICAL AND METALLURGICAL INDUSTRY. 441 tioii operating with the expansion of the compressed air inorder to utilize perfectly its capacity of work. The openingand closing of valves is, of course, performed automatically. Fig. 6 shows a piston and plunger pump with ir
Electrochemical and metallurgical industry . LENTRIFtCAI. IlMP. been emptied the air valve is turned off and the enclosed airescapes, whereby the vessel is filled again with a liquid froma higher reservoir through a tube with a suitable valve. Theliquid enters through .\ Fig. 5 shows an improved construe- NovEMHEK. laJ-XTROCHEMICAL AND METALLURGICAL INDUSTRY. 441 tioii operating with the expansion of the compressed air inorder to utilize perfectly its capacity of work. The openingand closing of valves is, of course, performed automatically. Fig. 6 shows a piston and plunger pump with iron frame andgearing. The val\e< art- polished stoneware halls, which arf. FIG. 8.—STONEWARE covered in some cases with ruhher. Ruhber rings, cotton im-pregnated with paraffin or asbestos are used for packing. Fig. 7 shows a centrifugal pump; the width of the pipe i;-50 mm., the diameter of the fan 300 mm. Sx 1000 r. p. m. itraises per hour 12 cubic meters to a height of 10 tests made with this pump are discussed by Prof. Lind-ner at some length on the basis of mathematical analysis. Fig. 8 shows a stoneware exhauster running at a circum-ferential speed as high as 35 to 45 meters per second. Thecapacity of these stoneware exhausters are very are l)uilt in sizes of 300, 200 and iso-mm. width of gases have a normal speed of 10 to 20 meters per maximum effect is therefore for the three sizes 80. 40 and20 cubic meters per minute, respectiveh. For more specialdetails reference may be made to Zcit. f. Angcwandtc , No. 49, and 1905, No. 6. The box II. at the right-handof the left-hand diagra
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