INJECTOR : INJECTOR An injector (steam) is a device used for feeding the water into steam boiler without any pump. USES The injector may be used to inject chemicals into the boiler drums of small, stationary & low pressures boilers Injectors are used for producing a vacuum pressure in steam jet pulling system Advantages: Simplicity Compactness High thermal efficiency Disadvantages: Low pumping efficiency Difficulty in operation when steam pressure varies