The Original Dome Valve®

Processes Worldwide

Thousands Of Installations

Macawber Engineering, Inc. specializes in the design and engineering of low velocity, dense phase pneumatic conveying and bulk handling processes.

We are the original designers and patent holders of the Dome Valve® (US patent 4,137,935 | 5,642,751). This robust filling valve is at the heart of every Macawber system. Learn more about our capabilities at

  • One moving part
  • Inflatable seat valve
  • Leak proof seal
  • Wear compensation


  • Replacement for conventional process valves
  • Abrasive applications
  • High temperature applications