Bell & Gossett G10047E Circuit Setter Balance Valves 4” thru 12” sizes - Manual (Page 3)

How to Use Bell & Gossett Circuit Setter Balance Valve as an Isolation Valve
1.Place a wrench on the wrench flats located on top of the Circuit Setter stem and rotate the stem until indicator ring indicates
the stem has reached the closed position. Apply additional torque to the stem until firm resistance in felt indicating the Circuit
Setter is closed.
2.Close the Isolation Valve on the other side of the equipment to be serviced. Allow system temperature to cool below 100°F
(37°C).
3.Open the drain valve to drain the system between the Circuit Setter and second Isolation Valve.
Service Instructions
Periodically inspect the Circuit Setter for signs of leakage or corrosion.
Stem Packing Nut Leakage
If leakage occurs at the stem packing nut, tighten nut until leaking stops. If tightening will not stop leakage, proceed as follows:
1.Note the set position of the Circuit Setter valve opening (% Stem Rise). Loosen the memory stop and slide stop down to the
indicator ring. Refer to Figure 1.
2.Open the Circuit Setter to the full open position until resistance is felt on the stem. This will backseat the stem, keeping any
leakage to a minimum during the servicing of the stem packing.
3.Loosen and fully remove the packing nut (located at the base of stem) by turning it counterclockwise.
4.Inspect packing for damage or debris that may be present. Remove any debris that may be there.
5.Refer to parts list for proper packing. Place one or two additional packing in the packing recess and replace and snugly
tighten the packing nut.
6.Close Circuit Setter part way and check for leakage with system pressurized.
7.If leakage is present, tighten packing nut until leakage stops.
8.Reposition the valve stem per observation in Step #1.
Leakage Through the Circuit Setter Seat
If the Circuit Setter leaks in the shut off or closed position, the rubber seat may be replaced as follows:
1.Open Circuit Setter so that it is not in the closed position.
2.Remove the cap screws that hold the upper assembly to the Circuit Setter body. See Figure 1.
3.Lift the upper assembly out of the Circuit Setter body.
4.Inspect the seat pressed into the Circuit Setter body for damage. If damaged, Circuit Setter must be replaced. If it is not
damaged, proceed to step 5.
5.Remove the nut and washer that hold the rubber seat to the seat disc.
6.Remove the rubber seat and replace only with a genuine Bell & Gossett replacement.
7.Replace the washer.
8.Add a drop of Loctite Grade 242 to threads and immediately install and securely tighten the retaining nut.
Size Nut Torque Requirements Size Nut Torque Requirements
4” 30 Ft. lbs. 8” 40 Ft. lbs.
5” 30 Ft. lbs. 10” 40 Ft. lbs.
6” 30 Ft. lbs. 12” 40 Ft. lbs.
9.Remove the gasket and thoroughly clean flange gasket surface at the body and cover.
10.Install new genuine Bell & Gossett gasket and replace the upper assembly into the Circuit Setter body.
11.Install the cap screws, securely tighten in a criss cross pattern.
12.Repressurize Circuit Setter and tighten cap screws as necessary if gasket leaks develop.
13.Return Circuit Setter stem to the preset position and return system to normal operation.
Lubrication of Stem Thread
Periodically lubricate the Circuit Setter stem threads with a good grade of grease such as Shell Alvania EP#2.
WARNING: Check for proper sealing when using the Circuit Setter as an Isolation Valve. If the seat is not sealing
properly, liquid will continue to flow from drain valves. In this case the Circuit Setter must be isolated from the
system and repaired. Failure to do so could result in serious personal injury and/or property damage.
WARNING: Corrosion or leakage are indications that the Circuit Setter may be about to cause serious damage. The
Circuit Setter must be replaced or serviced. Failure to follow this instruction can result in serious personal injury and/
or property damage.
WARNING: System fluid under pressure and/or temperature can be very hazardous. Isolate the Circuit Setter from
the piping system. Allow system temperature to cool below 100°F (37°C). Open a drain and vent all pressure from
Circuit Setter. Failure to follow this instruction can result in serious injury or death and/or property damage.
CAUTION: Rubber materials other than those supplied by Bell &Gossett may fail prematurely. This could result in
personal injury and/or property damage when used as an isolation valve.
CAUTION: Gasket materials other than those supplied by Bell & Gossett may fail prematurely. This could result in
personal injury and/or property damage.