a. Steam Nozzle.
b. Combining Nozzle with Flap.
c. Delivery Tube.
e. Cap Screw for Overflow.
f. Overflow Valve.
g. Tail Pipe.
h. Tail Pipe Nut.
j. Screw Plug with Stuffing-Box.
k. Follower Nut on Plug j.
l. Packing Sleeve to j.
m. Steam Spindle.
n. Crank to Spindle m.
o. Screw Nut to Spindle m.
p. Handle to Crank n.
The Monitor injector, Fig. [513], page 246, was designed originally for locomotive work. It consists mainly of two parts, viz., 1, the lifting device which raises the water into the injector and, 2, the forcing device which “picks up” the water and causes it to flow into the boiler.
The Metropolitan double tube injector is shown in the two figures on page 248.
These are made by the Hayden & Derby Mfg. Co. This instrument is of the double-tube design and in that particular resembles the Korting injector described on page 264. Both the lifting and forcing, as well as the overflow valves are controlled by one handle.
The Metropolitan single tube injector is represented by the Figs. [517] and [518], page 250. The internal parts of this injector, as may be seen from the sectional engraving, are stationary. The steam is regulated by the handle, K, which is attached to the stem, M; the water supply adjusts itself automatically.
The capacity of the leading injectors is nearly the same under similar working conditions as represented by the following
Table.
| Size of Pipe Connections. | Gallons per Hour. Maximum. | Gallons per Hour. Minimum. |
|---|---|---|
| 3⁄8 inch. | 85 | 50 |
| 1⁄2 „ | 165 | 75 |
| 3⁄4 „ | 350 | 130 |
| 1 „ | 580 | 325 |
| 11⁄4 „ | 900 | 425 |
| 11⁄2 „ | 1750 | 750 |
| 2 „ | 2850 | 1150 |
The figure below shows how the connections or piping should be made in attaching the Manhattan and Peerless injectors.