Steam Injection Humidifier is fed by steam from a main supply rather than being generated locally by a self-generative unit. Steam injection humidifiers are equipped with temperature-controlled receptacles for use with heated gas transfer lines. These humidifiers use steam from an external source such as an in-house boiler or a district steam system. Steam injection humidifiers are designed to inject dry saturated steam into a ducted air or through a fan unit system in such a manner as to ensure efficient mixing of steam air.

Steam jet ejectors offer a simple, reliable means of producing vacuum, and have a low installed cost as well. These are commonly found in process plants having available steam. The vacuum produced is useful for many processes, including evaporation, cooling, hydration, crystallization, deaeration, and filtration.

Steam jet ejector is a device that uses the energy in a steam jet to compress vapors. Steam jet ejectors are commonly used for producing vacuum by removing non condensable gases. They are connected in parallel to handle quantities of gas or in series to develop lower levels of vacuum. It utilizes high pressure steam to compress low pressure vapours or gases. This creates a vacuum in a vessel or chamber to which the ejector is connected. Steam at pressure expands through a nozzle and exits at very low pressure and at very high velocity. They have no moving parts and can be fabricated out of a large range of materials. They can be used for pumping highly corrosive, abrasive, and difficult to handle materials. The smooth, open flow passages permit them to handle entrained solids and liquid slugs without damage.