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 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.