MODELS CBV-S/A
3
ITEM
1040 SERIES
DATED
JANUARY 2015
The hose with the red fitting is upstream; the hose with the blue
fitting is downstream.
The probe should not be left inserted into the fitting for
prolonged periods of time, such as overnight, as leakage
of the P.M.P may occur when the probe is removed.
The locking nut on the probe is designed to hold it in the
P.M.P. when taking readings in systems having a high working
pressure. As sealing is accomplished internally on the probe
stem, it is only necessary to tighten the locking nut finger-tight.
Overtightening may cause damage to the P.M.P. or locking
nut threads.
Safety glasses should be used.
Before taking a flow measurement reading, set the valve to its
fully open (4.0) or at a preset position. Read the pressure drop
across the valve. Curves are in the Aurora catalog.
MEMORY SETTING – 2-1/2"– 6" VALVES (FIG. 6):
After the valve has been adjusted to its balance setpoint and
without moving the handwheel, remove the retaining bolt from
the end of the handwheel using a 1/4" Allen wrench.
Carefully remove the handwheel and turn indicator sleeve
assembly, leaving the valve at its balance setpoint.
Turn the plastic memory stop (clockwise) down until it stops.
Finger-tight pressure is sufficient. Do not overtighten.
Holding the memory stops in position, turn the lock collar
(clockwise) down until it stops against the valve bonnet. The
memory has now been set.
With the handwheel/turn indicator sleeve assembly still at its
balance setpoint indication, reinstall them on the valve stem and
hold in place with the 1/4" retaining bolt.
Care must be taken not to rotate the valve stem or
change the handwheel/indicator setting while setting
the memory.
REPOSITIONING HANDWHEEL – 2-1/2"– 6" VALVES:
The handwheel can be removed and repositioned in any of six
positions around the stem.
a. Close valve fully.
b. Remove handwheel-retaining bolt.
c. Remove handwheel and turn indicator sleeve by grasping
the handwheel and pulling away from the valve body
along the stem.
d. Select a new position for easy reading and with the sleeve
and handwheel held together in the closed position (0.0),
push them back over the bonnet head and valve stem.
e. Replace handwheel-retaining bolt.
f. Open valve.
If handwheel is removed for any reason, it is important to
first close the valve and then replace the handwheel
per d. and e. above.
REPACKING CBV UNDER FULL SYSTEM PRESSURE –
2-1/2"– 6" VALVES:
1. Open valve fully to its memory setting and, on a piece of
paper, record the valve setting.
2. Remove the handwheel/indicator sleeve assembly as
instructed in the first and second paragraphs under “Memory
Setting.”
3. Loosen the lock collar by turning it counterclockwise until it
seats against the top of the memory stop.
4. Remove the memory stop/lock collar assembly by turning
the plastic memory stop counterclockwise.
5. Using the handwheel WITH THE INDICATOR SLEEVE
REMOVED, turn the valve stem counterclockwise until the
valve is fully open and will not turn any further (45 ft. lbs.).
A step on the valve plug has now been back-seated against
the upper portion of the valve body (metal-to-metal).
6. The valve bonnet may now be removed. There may be slight
leakage, as the metal-to-metal backseating does not provide
a drip-tight seal.
7. Clean exposed portion of valve stem (do not scratch).
8. Remove and replace the O-ring and gasket.
9. Install the valve bonnet.
10. Replace memory stop/lock collar assembly into the valve
bonnet.
11. Close the valve fully by turning the stem in a clockwise
direction. Tightening valve bonnet is necessary to stop
any leaks.
12. Replace handwheel/indicator sleeve assembly per d. and a.
under “Repositioning Handwheel.”
13. Open valve to balance setpoint as recorded from first
paragraph under “Repacking CBV Under Full System
Pressure.”
14. Reset memory. Refer to “Memory Setting” on page 2.
CAUTION
O-RING
Fig. 6
CAUTION
