The Bell & Gossett CIRCUIT
SETTER "RF" calibrated balance valve is a precision machined ball type, triple
purpose balancing instrument. It is precisely calibrated for use as a presettable balance
valve, variable orifice flow meter and positive shut-off service valve for low flow
applications.
Valves are furnished with a calibrated nameplate and memory stop indicator. This permits
the valve to be preset to a fixed open position and then closed for service without
disturbing valve settings.
Valves are equipped with capped readout valves fitted with internal check valves, and a
¼" NPT tapped and plugged drain port. 
Construction:
• Body: Bronze
• Ball: Brass
• Seat Rings: Glass and Carbon filled TFE
• Stem: Explosion Proof
• Readout Valves: Brass with EPT check valve
• Stem "O" Ring: EPDM
Operating Data:
• Max. Working Pressure: Sweat Models: 200 psig *
• Max. Operating Temperature: 250ºF (121ºC)
VALVE
DESIGN AND CONSTRUCTION
All valves to be of bronze body/brass ball construction with glass and carbon filled TFE
seat rings. Valves to have differential pressure read-out ports across valve seat area.
Read-out ports to be fitted with internal EPT inserts and check valves. Valve bodies to
have ¼" NPT tapped drain/purge port. Valves to have memory stop feature to allow
valve to be closed for service and then reopened to set point without disturbing balance
position. All valves to have calibrated nameplates to assure specific valve settings.
Valves shall be designed for positive shut-off.
* Subject to type of
solder, reference Instruction Manual G95858.
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