Page 175 - 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 175
GBV-T
GBV-S
FIG. GBV-S & GBV-T
Five Turn Circuit Balancing Valves
TROUBLESHOOTING:
Symptom Likely Cause Solution
1. Valve is leaking:
• At the bonnet / body joint Bonnet O Ring has been damaged. Remove the handle / stem assembly and replace with
the appropriate replacement part indicated in Table 1.
• At the pipe connection If solder joint - the joint has failed, or was not soldered
properly.
Re-solder the connection and recheck for leakage.
If threaded - the connection is not suffciently tight, or Tighten and recheck for leakage.
the valve was over-tightened during installation and
the valve body has cracked (fractured).
Remove and reinstall a new valve, being careful not to
over-tighten.
2. Valve does not shut off completely when
closed (hand tight).
The seat O ring has been deformed due to overheating
during soldering.
Remove the handle / stem assembly and replace with
the appropriate replacement part indicated in Table 1.
Fig. 8: These curves
show the pressure drop
across the balancing valves
and are for use in valve
sizing. For “pressure drop /
fow” curves – required for
system balancing, please
refer to Fig. 7.
Fig. 8: These curves show the
pressure drop across the
balancing valves and are for use
in valve sizing. For “pressure
drop / fow” curves – required
for system balancing, please
refer to Fig. 7.
GL-2.10