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The Fundamentals Of A Vacuum Ejector

DAS Services Inc.

An ejector is a pumping device and it does not contain any moving parts. The ejectors use either gas or fluid as a motive force. If the ejector uses fluid, then it is called a steam ejector. A vacuum is nothing but air. If space contains air pressure below the atmospheric pressure, it is called a vacuum. If an ejector uses high pressure and compressed air, then it is called vacuum ejector. The compressed air will pass on through the convergent nozzle, which will be then converted into the velocity energy. A compact ejector with air-saving regulation uses less compressed air while comparing to traditional vacuum ejector. 

How Does Vacuum Ejector Works?

The vacuum ejector works on the venturi principle. The vacuum ejector is divided into two types, which are ejectors with eco-nozzle technology and single-stage ejectors. The components of the vacuum ejector are nozzle, chest, throat, suction, and diffuser. In single-stage vacuum ejector, the compressed air will be supplied through the opening of the ejector and then it flows through the nozzle. 

During this process, the air is compressed and accelerated. After flowing through the nozzle, the compressed air slows down and hence the vacuum is generated.  In this way, the air is drawn through the vacuum connection and the compressed air will be escaped through the diffuser. 

If the vacuum ejector contains eco-nozzle technology, then the air will flow through many venture nozzles arranged in a row-like fashion. The volumes of the nozzles will be added together to define the total suction rate. 

Applications of Vacuum Ejector

Vacuum ejector is used in industrial automation devices and robotic applications. The applications of the vacuum ejector will vary according to the type of the ejector modules. 

  • The vacuum ejector module with eco-nozzle technology is efficient in vacuum generation and high suction rate. The consumption of air is less in this module. This kind of vacuum ejector module is used in the packaging industry.
  • The vacuum ejector without system monitoring and valve control is used to manage air-tight work-pieces.
  • You can address vacuum ejector with integrated system monitoring, valve technology, and IO-Link technology. This is used in robot components and automation handling systems. 

Benefits of Using Vacuum Ejectors 

  • No heat generation
  • Compact shape
  • Flexible installation position
  • Lightweight 
  • No moving parts, so low maintenance, and low wear and tear
  • Fast vacuum generation 
  • Easy to operate
  • Outcome is effective
  • Space saving design
  • Gentle handling

Variables of Single-Stage Ejectors 

  • The suction flow rate is average
  • Initial cost is low
  • Evacuation time is short
  • Noise generation is high

Variables of Multi-Stage Ejectors 

  • The suction flow rate is high
  • Initial cost is high
  • Evacuation time is very short
  • Noise generation is low

Features of Vacuum Ejector

  • High vacuum level with a small flow rate
  • Flexible mounting position
  • Minimum maintenance expenses 

I hope that I have covered some worth-reading information on the basics of the vacuum ejector, which would help you to know what it is, its features and benefits.