TABLE._Pumps and Hydraulics, Part 2 (of 2)

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SIZE. | CAPACITY.

--------+--------+---------+-------+-------+-------

of Steam|of Water| Stroke | per | per | per

--------+--------+---------+-------+-------+-------

4-1/2 | 4-1/2 | 5 | .34 | 125 | 43

5-1/2 | 4-1/2 | 7 | .48 | 125 | 60

6 | 5-1/2 | 7 | .72 | 125 | 90

7-1/2 | 7 | 10 | 1.66 | 100 | 166

7-1/2 | 8 | 10 | 2.17 | 100 | 217

6 | 6 | 12 | 1.47 | 100 | 147

8 | 6 | 12 | 1.47 | 100 | 147

8 | 7 | 12 | 2.00 | 100 | 200

8 | 8 | 12 | 2.61 | 100 | 261

--------+--------+---------+-------+-------+-------

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SIZE. | PIPE SIZES.

--------+--------+---------+-----+-------+-------+---------

--------+--------+---------+-----+-------+-------+---------

4-1/2 | 4-1/2 | 5 | 1/2 | 3/4 | 2 | 1-1/2

5-1/2 | 4-1/2 | 7 | 3/4 | 1 | 3 | 2-1/2

6 | 5-1/2 | 7 | 3/4 | 1 | 3 | 2-1/2

7-1/2 | 7 | 10 | 1 | 1-1/2 | 5 | 4

7-1/2 | 8 | 10 | 1 | 1-1/2 | 5 | 5

6 | 6 | 12 | 3/4 | 1 | 4 | 4

8 | 6 | 12 | 1 | 1-1/2 | 4 | 4

8 | 7 | 12 | 1 | 1-1/2 | 5 | 4

8 | 8 | 12 | 1 | 1-1/2 | 5 | 5

--------+--------+---------+-----+-------+-------+---------

_The Single Magma Pump._ The term _magma_ includes any crude mixture,

especially of organic matters in the form of a thin paste, it also

means “a confection,” hence, the name given to the pump illustrated

in Figs. 453 and 454 is very appropriately applied to a sugar-house

apparatus. It is designed for pumping various thick heavy mixtures and

semi-liquids and for moving massecuite, second and third sugar.

[Illustration: FIG. 453.]

[Illustration: FIG. 454.]

The construction in Fig. 453 is such as to insure strength and

certainty of operation; there are no intricate small parts, and the

interior is readily accessible. These pumps are made with brass-lined

cylinders, or cylinders and fittings entirely of composition when

needed to overcome the difficulties appertaining to pumping acidulous

and corrosive liquid substances.

_The single fly-wheel magma pump_ as shown in Fig. 454 represents the

highest type of machine for this class of work. The steam end is of

the plain slide valve pattern. _It is fitted with a heavy fly-wheel_,

perfectly balanced. The admission of steam is regulated by a throttling

governor of approved design. The fly-wheel and governor insure a

uniform speed of the pump under variations of load—hence the fly-wheel

pump does not require adjustment of throttle for every variation in

water pressure, as is necessary with direct acting pumps.

The following table applies to the two styles of the magma pumps—with

and without the fly-wheel, as the pump ends are the same in both.

Attention is called to the number of strokes per minute (thirty) shown

in the table as compared with the number of strokes (100 and 125)

called for in the previous table. This is caused by the different

viscosity of the stuff to be handled by these machines.