M550 pages

Miniature

A

Model
55

Model 55 Miniature Precision Regulator
Features
• ompact size
C
• ightweight unit
L
• andles high supply pressure
H
• igh accuracy for precision control
H
• olymer construction for corrosive
P
resistance
• enturi design compensates downstream pressure
V
droop under flowing conditions
• on-rising adjustment knob
N
• anifold mount capability
M
• eparate control chamber isolates the Diaphragm from
S
the main flow to eliminate hunting and buzzing

Operating Principles
When the setpoint is reached, the upward force of the
output pressure that acts on the bottom of the Diaphragm
balances with the downward force that acts on the top
of the Diaphragm. If the output pressure rises above
the setpoint, the force that acts on the bottom of the
Diaphragm moves the Diaphragm Assembly upward
to close the Supply Valve and open the Relief Valve.
Excess output pressure exhausts through the Vent in the
unit until it reaches the setpoint.

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www.fairchildproducts.com