Equa-Draw® System 

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Equa-Draw® System

The Wallace & Tiernan Equa-Draw® system automatically balances the flow from vacuum-manifolded gas supplies and provides for the equal drawdown of all manifolded containers.

Equa Draw System
Equa-Draw System with Series 55-400 Remote Vacuum Switchover Unit

This innovative, patented system can be used to retrofit existing installations where un-equal withdrawal rates are a chronic problem or it is desired to upgrade to a vacuum manifolded configuration. Operation is automatic, requiring no operator monitoring or adjustment. The use of balancing rotameters is not required.

Combined with the Series 55-400 Remote Vacuum Switchover Unit, this provides an uninterrupted, continuous supply of gas. Switchover is automatic and non-isolating, eliminating the need for manual by-pass valves and ensuring completely empty supply containers.

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Features and Benefits

  • Balanced withdrawal rates from all manifolded containers regardless of changes in system feedrate
  • Automatic operation requires no operator monitoring or adjustment.
  • Modular design allows for field modification  to add or remove modules to accommodate changes in the number of  supply containers. 
  • Can be used to retrofit existing installations where un-equal withdrawal rates are a chronic problem or it is desired to upgrade to a vacuum manifolded configuration.
  • Balancing rotameters are not required.
  • Requires no electrical power or external power source other than the standard  system operating vacuum supply.
  • Combines with the Series 55-400 Remote Vacuum Switchover Unit to provide an uninterrupted, continuous supply of  gas. Switchover is automatic and non-isolating, eliminating the need for manual by-pass valves and ensuring completely empty supply containers.
  • Suitable for use with chlorine or sulfur dioxide gasses in cylinders or ton containers.
  • Corrosion-proof construction utilizes no metallic components for long-life operation.

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Product Documentation

Product Sheet
Equa-Draw® System

Global Chemical Feed & Disinfection Sales, Service & Support


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