NIBCO Circuit Balancing Valve 737A - Manual (Page 2)

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OPERATION INSTRUCTIONS
All balancing valves should be in the fully open position prior to water distribution system
commissioning or flushing. Regulation is accomplished by rotating the handwheel clockwise.
The disc position corresponds with the Indicator Counter display window. At the closed position,
Indicator Counter should show 00. If not, refer to setting instructions below.
VALVE SETTING INSTRUCTIONS
1. Determine desired flow rate for each valve and adjust valve handwheel until desired rate is
achieved. Refer to NIBCO Flow Data instruction sheets for relationship between Flow Rate,
Signal/Head Loss, and Handwheel Position.
2. Remove cap form center of handwheel.
3. Turn regulating screw counterclockwise until it stops using a small flat blade screwdriver.
This sets the memory stop so the valve can be closed and then returned to this
predetermined set position.
4. Replace cap into center of handwheel.
CLOSED POSITION 00 SETTING INSTRUCTIONS
1. Rotate handwheel clockwise until valve is in the closed position.
2. Remove cap from center of handwheel, remove center screw and washer, and lift
handwheel upward removing it from valve stem.
3. Remove white plastic counter ring from inside of blue plastic neck ring by lifting upward.
4. Grasp blue plastic neck ring and lift upward to remove it from valve.
5. Lift and rotate the white plastic spring loaded counter wheel until red color 0 is facing out
opposite stem.
6. Replace blue neck ring onto counter assembly plate, aligning view window with counter
wheel, checking to see that red zero is showing in the view window.
7. Replace white counter ring inside neck ring, rotate until blue 0 is displayed in view window.
8. Reassemble handwheel assembly onto valve stem and secure with screw and washer.
9. Replace handwheel cap.