HOW TO USE BELL & GOSSETT CIRCUIT SENTRY FLO-
SETTER BALANCE & COMMISSIONING VALVES AS
FLOW METERS
The flow through the valve can be identified by
measuring the differential pressure (Δp) across the valve.
If the measured differential pressure is above the
minimum Δp, the flow is the one stated on the graph
for the valve.
If the measured differential pressure is below the
minimum Δp, the flow can be found by using the
formula below.
Q = Cv x Δp
Q
Flow Rate
GPM
C
v
Flow Coefficient
GPM/PSI
Δp
Differential Pressure
PSI
WARNING: Hot water leakage can occur
from readout valves (P/T ports) during
probe insertion and during hookup of readout
kit. Follow the instruction manuals supplied with
readout probes and readout kits for safe use.
Failure to follow these instructions could result in
serious personal injury or death
and property damage.
SERVICE INSTRUCTIONS
Periodically inspect the Circuit Sentry Flo-Setter for signs
of leakage or corrosion.
WARNING: Corrosion or leakage are
indications that the Circuit Sentry Flo-
Setter must be replaced. Failure to follow
these instructions could result in serious personal
injury or death and property damage.
INSULATION
Bell & Gossett recommends that insulation be attached
to the Circuit Sentry Flo-Setter after the system has been
balanced.
NOTE: Tape or other acceptable means should be used
to secure the insulation to the Circuit Sentry Flo-Setter
Balance & Commissioning Valve.
Xylem Inc.
8200 N. austin avenue
Morton Grove, Illinois 60053
Phone: (847) 966-3700
Fax: (847) 965-8379
www.xyleminc.com/brands/bellgossett
Bell & Gossett is a trademark of Xylem Inc. or one of its subsidiaries.
© 2011 Xylem Inc. 310952B December 2011
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