Model 300 pages

A

Model 30 Midget Precision Regulator

Model
30

Features
• ontrol sensitivity of 1/4” water column
C
variation allows use in precision applications.
• ressure Balanced Supply Valve lets the
P
regulator remain unaffected by supply
pressure changes.
• low of up to 40 SCFM with 100 psig
F
supply allows use in applications with high
flow requirements.
• n aspirator tube compensates downstream
A
pressure droop under flow conditions.
• separate Control Chamber isolates the
A
diaphragm from the main flow to eliminate
hunting and buzzing.
• nit construction lets you service the Model
U
30 without removing it from the line.
The Model 30 is designed for
applications that require high capacity and accurate process
control. A supply valve which is
balanced by utilizing a rolling diaphragm, insures a constant
output pressure even during wide
supply pressure variations. Stability
of regulated pressure is maintained
under varying flow conditions
through the use of an aspirator tube
which adjusts the supply valve in
accordance with the flow velocity.

• anadian Registration Number (CRN)
C
Certification for all territories and provinces.

Operating Principles
The Model 30 Regulator uses the force
balance principal to control the movement
of the valve assembly which in turn controls
the output pressure. When the regulator is
adjusted for a specific set point, the
downward force of the Range Spring
causes the Diaphragm Assembly to move
downward. The Supply Valve opens and
allows air to pass to the Outlet Port. As the
set point is reached, the downward force
exerted by the Range spring is balanced by
the upward force of the downstream pressure acting on the bottom of the Diaphragm
Assembly. The resultant force moves the
supply Valve upward to reduce the flow of
air to the Outlet Port.
Outlet pressure is maintained as a result of
balance between forces acting on the top
and bottom of the Diaphragm Assembly.

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