11
MCV Controller Operating Notes
Alicat’s MCV mass ow controller is equipped with an integrated Swagelok®
positive shuto valve. The normally closed valve is actuated by a gas (typically
air) and opens when supplied with 60-120 psig of pressure. The shut-o valve
closes again when this pressure is removed.
A common method for actuating the shuto valve incorporates a three-way
solenoid valve (below). Pressure is applied to one side of the solenoid valve
while the other side of the solenoid is left open to atmosphere. When the
solenoid is energized, pressure is delivered to the shuto valve, causing it
to open. When the solenoid is returned to a relaxed state, the gas vents to
atmosphere, allowing the shut-o valve to close.
All standard MC-Series device features and functions are available on
the MCV-Series and operate in accordance with the standard MC-
Series operating instructions.
Three-way Solenoid Valve
MCV Mass Flow
Controller
Vent
Positive
Pressure
MCV mass ow controller and three-way solenoid valve.
Getting Started
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