Depending on the applications, you may benefit from a vacuum tank. Vacuum tanks can provide buffer volume to control the rate of pressure changes and the extent to which pressure fluctuation are experienced at the point of use of vacuum on the process.
All Atlas Copco's vessels are made out of carbon steel with a protective paint finish to the outer surfaces. They are available in sizes from 500 to 5000 liters, both vertically and horizontally orientated.