Page 173 - publication

gruvlok installation and assembly
Introduction
Couplings
Outlets
Fittings
Val
ves &
Accesso
ries
HighPressure
Advanced CopperMethod (IPS)
DI-LOK
®
Nipples
Plain-EndFittings
HDPECouplings
Sock-It
®
Fittings
StainlessSteel Method
Roll
Groovers
Installation& Assembly
SpecialCoatings
DesignServices
Technical
Data
Master Format3 Part Specs.
PictorialIndex
CTS Copper
System
www.anvilintl.com 173
FIG. GBV-S & GBV-T
Five Turn Circuit Balancing Valves
INSTALLATION:
1 Clean the system piping of debris (pipe
scale, rust, welding slag) and other
contaminants. As with any water system it
is important to make provisions to keep the
system clean. For optimum operation, air
entrapment in the fuid must be removed.
2 The operation of the valve is dependent
on the fuid characteristics such as specifc
gravity and viscosity, which vary with the fuid
temperature. For installations using fuids
other than 100% water, fow rates must be
corrected for the changes created by the fuid
medium. See www. anvilintl.com for appropriate
correction factors, or call your local Anvil
representative.
3 To ensure accuracy of measurement Circuit
Balancing Valves (GBV’s) should be located
at least fve pipe diameters downstream from
any ftting and at least ten pipe diameters
downstream from a pump (as illustrated in Fig. 1).
4 All GBV’s are marked with an arrow on the
valve body to indicate direction of fow.
The arrow must point in the direction of fow
for proper operation.
5 GBV’s may be installed in horizontal or
vertical piping (as illustrated in Fig. 2).
Provisions must be made for easy access to the
probe metering ports (P.M.P.’s), reading scale, and
memory stop.
GBV-S - SWEAT (SOLDER)
CONNECTIONS:
6 GBV-S models are supplied with sweat style
connections. Caution should be used when
sweat style connection valves are installed to
prevent overheating the valve.
7 Solder the valve body in line using 95/5
(95% tin, 5% antimony) type solder or
equal. Always follow local plumbing codes for
installation best practices.
GBV-T - NPT THREADED
CONNECTIONS
6 GBV-T models are tapped with NPT
threaded connections. All threaded
connections should be sealed using an approved
pipe sealant per industry standards. Once
the GBV installation has been completed and
the system has been flled and purged, each
valve loop must be adjusted to the correct
fow setting. Employ piping best practice
when engaging pipe to threaded valves.
Overtightening when installing valves may result
in fracturing of the valve body at the threads.
(Go to Step 8)
OPERATION:
8 Valves are circuit balancing valves that are
selected to deliver the correct fow in a
piping circuit based on line size and design fow
rate.
9 To set the system fow, adjust the
handwheel position until the differential
pressure reading across the venturi corresponds
to the required GPM.
10The valve operates from fully open to
closed by a clockwise rotation of the
orange handwheel using fve 360° turns. Two
indicators describe the position of the valve: the
handwheel turns dial and the micrometer scale.
• “Handwheel Turns” Dial: This dial is
printed on the outer surface of a gearing
mechanism located inside the lower half of
the handle assembly (Fig. 6). Each complete
360° revolution of the handwheel is visible
through a display window and is scaled 0 - 5
to indicate the valve position in terms of the
number of full turns. (Fig. 3)
• Micrometer Scale: This scale is marked 0
- 9 and is located on the upper half of the
handle assembly. Each mark represents 1/10th
of a full, 360° turn of opening when lined up
with an arrowhead symbol, located above
the handwheel turns display window. (Fig. 3)
CAUTION :
Before soldering, ensure the valve is opened at
least one full turn to avoid damage to the sealing
O-ring due to overheating. Anvil recommends
that the GBV be protected during installation by
wrapping a damp rag around the handle / bonnet
assembly prior to soldering the valve into the line.
WARNING:
Anvil does NOT recommend leak testing an
HVAC system with air due to safety concerns.
Testing HVAC systems with pressurized air can be
dangerous due to the high compressibility of air, as
compared to water.
11The valve is considered “zeroed” when
fully closed hand tight. The “0” on the
micrometer scale should be within one half of
1/10th of a turn of the arrowhead symbol when
the valve is closed hand tight. DO NOT USE A
WRENCH ON THESE VALVES – THEY SHOULD
BE OPENED AND CLOSED HAND-TIGHT ONLY!
GBV GBV
Fig. 1
Fig. 2
SCALE
DIAL
Fig. 3: GBV setting
of 0.0 indicates that
the valve is closed.
Both the handwheel
turns dial and the
micrometer scale
indicate a valve
position reading
of 0.
Fig. 4: GBV setting
of 2.3 indicates that
the valve is partially
open (2.3 turns open).
GL-2.10