MODEL CBV-S/A GROOVED
2
ITEM
1040
DATED
JANUARY 2015
TYPICAL APPLICATIONS:
CBV-S/A Grooved circuit
balancing valves are rugged,
double regulating valves for
balancing hydronic fluid flow
in HVAC heating and chiller
systems. These valves combine
the functions of positive shut-
off, precise flow regulation,
and variable orifice flow
measurement. Ensure application
requirements are compatible with materials of construction,
temperature and pressure ratings, and flow rate ranges, as
defined in the corresponding product submittals.
CALIFORNIA PROPOSITION 65 WARNING:
This product and related accessories contain
chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm.
VARIABLE VS FIXED ORIFICE FLOW
MEASUREMENT:
CBV-S/A Grooved circuit balancing valves are equipped with
PT ports across the valve seat for basic variable orifice pressure
drop to flow correlation. When installed as prescribed, flow
measurement accuracy to ± 5% is achievable when the valve is
wide open. For higher accuracy, especially at high turndown,
the CBV may be used in conjunction with a fixed orifice
flowmeter. Refer to fixed orifice flowmeter instructions for
additional requirements, if applicable.
LOCATION:
1. The CBV-S/A Grooved may
be installed in vertical or
horizontal piping.
2. Ensure the valve flow
direction arrow matches the
system fluid flow direction.
3. When desired, the valve may be converted to elbow
configuration:
a. To suit physical constraints.
b. To eliminate the need for an additional discrete elbow.
4. For optimum flow measurement accuracy and when
practical, locate the valve:
a. 5 pipe diameters downstream of a fitting.
b. 2 pipe diameters upstream of a fitting.
c. 10 pipe diameters upstream or downstream of a pump.
5. Ensure sufficient clearance is provided for:
a. Handle operation / removal
b. PT port access
c. Drain port access
6. Ensure the valve is mounted
such that the:
a. PT ports are pointing up
so they will not become
clogged with dirt that
may be present in the
hydronic fluid.
b. Drain ports are pointing down so they will effectively
drain fluid from the valve.
c. If necessary, exchange the positions of the PT ports
and drains.
CONVERSION TO ELBOW CONFIGURATION:
To change the valve from straight
to elbow configuration:
1. Open the valve handle one
complete turn.
2. Remove the 4 hex cap bolts
holding the split-case halves
together.
3. Rotate one half of the casing
180 degrees, taking care not to dislodge or damage the
casing O-ring.
4. Ensure the valve halves are properly seated.
5. Insert the 4 hex cap bolts and tighten evenly starting with
opposite corners.
SYSTEM CONNECTIONS:
Before making system connections, ensure adjacent piping is
free and clear of burrs and debris.
1. Grooved Connections:
a. For lowest cost installation and minimum off-axis
loading, Aurora grooved products may be connected to
the system piping (or another component) by the industry
standard groove connections, using any compatible
grooved coupling.
b. Follow the coupling manufacturer’s instructions for
making reliable connections.
2. Flange Adapters:
a. When desired, one or both of the grooved valve
connections may be fitted with an flange adapter as
required to suit the system connections.
b. Place the two halves of the flange adapter onto the
groove.
c. Ensure the tab on the flange adapter is between the two
locking lugs of the valve body.
d. Apply silicone to the inner and outer diameters of the
flange adapter gasket.
e. Press the gasket, printed side in, firmly between the valve
body and flange adapter.
f. Position the assembly to the mating flange, and insert all
flange bolts.
g. Tighten all flange bolts evenly, using a standard flange
tightening pattern.
h. Ensure the flange adapter gasket flat face (not printed)
contacts the mating flange surface squarely.
2D
5D
CBV
CBV
PUMP
2D
10D
