===================================================================
|Size of|Steam 50 lbs.|Steam 100 lbs.|Steam 150 lbs.|Size of
Size | Iron +------+------+------+-------+------+-------+ Copper
No. | Pipe. |Gals. | H. P.|Gals. | H. P. |Gals. | H. P. | Pipe.
------+-------+------+------+------+-------+------+-------+--------
00 | 1/8 | 33 | 7 | 48 | 10 | 60 | 12 | 1/4
0 | 1/4 | 83 | 17 | 101 | 20 | 112 | 22 | 3/8
1 | 3/8 | 112 | 23 | 143 | 30 | 180 | 36 | 1/2
2 | 1/2 | 172 | 35 | 210 | 40 | 232 | 46 | 5/8
3 }| |{ 278 | 56 | 338 | 70 | 397 | 80 }|
3-1/2}| 3/4 |{ 398 | 80 | 472 | 95 | 547 | 110 }| 7/8
4 | 1 | 533 | 108 | 622 | 125 | 720 | 150 | 1-1/8
5 } | |{ 675 | 136 | 802 | 160 | 922 | 190 }|
6 } | 1-1/4 |{ 825 | 165 | 990 | 200 | 1125 | 230 }| 1-1/2
7 } | |{1072 | 215 | 1372 | 289 | 1612 | 320 }|
8 } | 1-1/2 |{1388 | 280 | 1800 | 360 | 2115 | 430 }| 1-3/8
9 } | |{1688 | 340 | 2100 | 420 | 2475 | 500 }|
10 } | 2 |{2025 | 400 | 2438 | 500 | 2850 | 570 }| 2-1/4
------+-------+------+------+------+-------+------+-------+--------
NOTE.—The above table relates to the double tube injector.
_The acid syphon pump_, shown in Fig. 548 below, is used by many
chemical works, in lifting their acids and other chemicals to be
conveyed to any part of the building. The machine is made of lead,
encased in an iron shell for strength, and fitted with a platinum steam
nozzle to give that part durability.
This device is named a syphon pump because it becomes a _syphon_ by
turning down the delivery pipe and making that end longer than the
suction end. The apparatus, shaded in the figure, is really a jet pump
and it is simply used to operate the syphon, _i.e._, by turning on the
steam the acid will flow through the syphon. At this point the steam
should be shut off and the flow of acid will continue.
[Illustration: FIG. 548.]
_Noiseless Water Heater._ This instrument, Fig. 549, is used for
warming of liquids; it avoids the noise that is otherwise caused by the
action of steam led for that purpose direct into cold liquids.
In operation, the liquid is drawn through the holes in body and
discharged through shank, causing a circulation of the liquid in tank.