Electronic Vacuum Valves for Process Automation

Electronic Vacuum Regulating Valves Sizes 1.5″ to 4″

Equilibar higher flow electronic vacuum regulating valves provide a much faster and more precise solution than traditional butterfly valves with PID control.

In the Equilibar® two-stage pilot operated solution, a small electronic vacuum pilot regulator sends a vacuum setpoint signal to the larger back pressure regulator (BRP), resulting in a controlled vacuum at the inlet of the BPR at a direct 1:1 relationship. An Equilibar high resolution electronic vacuum pilot regulator is used for this purpose. This combination of an electronic vacuum pilot regulator with a precision pilot operated back pressure regulator produces a complete electronic vacuum valve package. Electronic vacuum valves are available in traditional 4-20mA analog or in modern serial digital inputs.

These valves can be used in open loop mode or closed loop mode. In open loop, a command signal from the main computer controller is sent to the electronic vacuum pilot regulator. The vacuum pilot regulator transmits a vacuum setpoint signal to the Equilibar vacuum regulator which makes adjustments to bring the process vacuum very close to the pilot vacuum setpoint. Changes in flow rate may cause small errors in open loop mode.

In closed loop mode, the process vacuum pressure is monitored by a separate vacuum pressure sensor and command signal to the pilot regulator is adjusted to bring that process pressure to match desired setpoint. This PID action may be accomplished inside the electronic pressure regulator, depending on the model, or configured in the process control system.

Contact an application engineer to discuss the best way of automating your process vacuum.

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