It is the section through which high connection motive steam enters from appropriate surrounding to the steam ejector system. Steam ejectors have capability of performing very well and creating vacuum conditions at high efficiencies. Steam ejectors can be made of practically any workable material hence specific erosion resistant material can be chosen and they can also be coated with a corrosion resistant material. Some of the advantages that the steam ejectors have over conventional vacuum pumps are that steam ejectors have no moving parts at all, it means there is no problem of wear and tear within the equipment. The characteristics of the supersonic flow are that when cross-sectional area decreases then the velocity of fluid also decreases and the pressure increases. Throughout the path of the fluid flow, the actuating gas is decelerated and the secondary gas is accelerated.Īfter the fluid enters the converging section of the system called the inlet diffuser section the nature of the fluid flow corresponds to supersonic flow. This causes the secondary gas to move out of the container or equipment and enter into the suction chamber through suction inlet. Due to the high velocity of steam through the nozzle, a low pressure region is created in the suction chamber. The speed of the steam increases quite a lot when it passes through nozzle.ĭuring the working process the actuating gas is expanded from its initial pressure to a pressure equal to that of the secondary fluid.

The nozzle converts the high pressure steam into high velocity stream. The high pressure steam first passes through the steam chamber and enters the suction chamber through nozzle.

Steam Ejector Design Software