MODELS CBV-S5 AND CBV-NPT5
4
ITEM
1040 SERIES
DATED
MARCH 2015
Connect pressure measuring device to the CBV metering ports
as follows:
• Remove protective cap from metering ports (¼" NPT
connection).
• Insert the meter probe into the metering ports. The hose with
red fitting, up stream; the hose with blue fitting downstream.
Refer to Fig. 6.
When inserting probe, do not bend, as this will cause
permanent damage to the probe, adversely affecting the
pressure measurement. Do not use any lubrication on
the probes when inserting them. If necessary, simply wet
the probes with clean water.
The probe should not be left inserted into the fitting for
prolonged periods of time, overnight, etc., 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. 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.
Before taking a measurement reading, set the valve to its fully
open position (5.0) or at a preset position. Read the pressure
drop across the venturi with a digital meter. Determine flow rate
by use of Venturi C
v
Performance Curves (Fig. 8).
The handle of the CBV is not designed to be removable. Do not
try to take it off the valve, or it may become damaged. If for any
reason the handle is damaged, replace the entire handle/stem
assembly with the appropriate replacement part indicated below.
571155-225 for size 1/2"– 2"
570155-105 for size 2-1/2"– 6"
570155-015 for size 8"– 12"
MEMORY SETTING:
After valve has been properly adjusted and without moving
the handwheel, the locking memory stop should be set. The
memory stop will allow the valve to be fully closed for isolation
and then reopened to the preset flow position.
Insert a 2.5 mm (or 3/32") Allen key through the hole provided
in the valve’s handle cap. (Fig. 7)
Turn the setscrew in a clockwise direction until it stops.
It is not necessary to tighten. The memory has now been
set. This establishes the maximum opening position for this
particular valve.
The valve may now be closed tightly, as needed, for isolating
the piping during system maintenance.
To return the valve to its preset “balanced” position, simply
open the valve by turning the handwheel counterclockwise
until the handle stops turning (the valve stem inside the
handle has hit the memory set screw). DO NOT APPLY
EXCESSIVE FORCE WHEN REOPENING THE VALVE
– OPEN ONLY UNTIL THE VALVE STOPS TURNING
UNDER “HAND-TIGHT” CONDITIONS. DO NOT USE
A WRENCH TO OPEN, CLOSE, OR TIGHTEN VALVES.
High Pressure Port (red)
Low Pressure Port (blue)
Fig. 6
CAUTION
