54 BULLETIN 1370, U. S. Da2PARTMENT OF AGRICULTURE — 
DILUTE-SIRUP PUMP 
A centrifugal, direct-acting, or power-driven pump is necessary for 
pumping the dilute sirup from the dilute-sirup pump tank back to 
the evaporaters. The centrifugal type, which is easily driven from 
the line shaft by means of a belt, is recommended for smaller plants. 
The direct-acting type will no doubt be more convenient for larger 
plants. 
SIRUP STORAGE TANKS 
Sirup storage tanks of the sizes designated in Table 11 should be 
provided for storing a reasonable quantity of the finished product. 
They may be of circular, rectangular, or square cross section, and are 
arranged in several units, so that inferior lots of sirup may be kept 
apart. The storage tanks are placed high enough to permit the sirup 
to flow to the canning or barreling department by gravity. Washout 
connections in the bottom of each tank lead to the sewer and to the 
raw-juice tank. All storage tanks should be well covered. 
SIRUP COCLER 
Sirup should not be placed in storage tanks while hot, but should 
be cooled somewhat during its passage from the evaporators to the 
Fic. 17.—Sirup cooler 
sirup storage tanks. This may be accomplished by providing an 
open canal, 60 to 80 feet long, through which the sirup is conducted 
slowly and in a shallow layer to the storage tanks, or use may be made 
of a sirup cooler (fig. 17), made by placing a copper coil in a piece of 
large pipe. The end covers of the cooler are made by drilling blind 
flanges to permit passage of the ends of the coil, connections bemg 
made by lock nuts and washers. ‘The water inlet is at the bottom of 
the pipe, and the outlet is at the top. The sirup is cooled as it passes 
through the coil thus surrounded by running water. The cooler 
required for the 50 and 100 ton plants is made of 18 turns of 144-inch 
copper coil placed in a 12-inch pipe. For the 200 and 300 ton plants 
22 turns of 2-inch copper coil placed in a 14-inch pipe are needed. 
Although the open-canal method of cooling is most generally used 
at present, the temperature can be controlled better by usimg the 
cooler. 
COST OF BUILDINGS 
The costs in Table 11 are for wooden buildings; steel buildings cost 
approximately three times as much, but the depreciation and in- 
surance charges on them are less. On the whole, wooden buildings 
are satisfactory for a sirup factory, principally because no very heavy 
machinery is staged and Lupparted By the building proper, all of the 
