The dotted lines indicating pipe and fittings in connection with the suction represent the way the water supply is to be received from a tank located above the level of the injector.
Fig. 519.
The makers of these two instruments have kindly furnished the following general rules to govern their connection with steam supply:
1. Place injector in a horizontal position. (See illustrations [512] and [514].) The flap nozzle must in all cases open upward in direction of air valve. In taking injectors apart be careful to replace it in that position.
2. Take steam from the highest part of boiler; never connect to pipes furnishing steam for other purposes.
3. Have all joints perfectly tight, especially the suction pipe, as no injector will lift water unless atmospheric air is excluded.
4. Have all pipes thoroughly cleaned from red or white lead and scale before the injector is connected; it will save trouble afterwards.
5. All pipes must be of the same or larger diameter than the corresponding parts of injector.