The Steam Injector
A theoretical and practical treatise on the design and operation of injectors and on the flow of fluids through and the design of nozzles.

OVERFLOW ARRANGEMENTS. 61 flow apertures are closed by flaps e as shown. This injec- tor is of the combination type, adapted for direct connec- tion by the flange h, containing steam and delivery pas- sages to the boiler front plate. Fig. 38. Figs. 40 and 41 show a similar type of injector to that illustrated at fig. 39, but of tlie horizontal pattern for fitting below the water level. Fig. 41 is a plan view df the injector shown in gectional elevation at fig. 40. Fig. 39. Another arrangement is shown at fig. 42. In this the fluid in the delivei’y chamber a cannot obtain free access to the overflow valve stem b to load the latter, but is con- trolled by a spring-loaded valve c so as to prevent such