Warren Controls 1800 Series Heavy Globe Control Valves - Manual (Page 10)

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2600 Emrick Blvd • Bethlehem, PA 18020 • USA •800-922-0085 • www.warrencontrols.com
series 1800 Heavy Globe control valves
are for the most part maintenance free when
properly selected and installed. Rebuilding of
these valves should not be necessary under
normal operating conditions. For best opera-
tion follow installation guidelines (See Instal-
lation section); maintain the fluid pressure,
temperature, flow, flowing differential pres-
sure, and shut-off differential pressure within
the limits of the valve (See Series 1800 Prod-
uct Specification for details). In installations
where high vibration exists, pneumatic and/or
electrical connections should periodically be
checked for integrity. In water or water and
glycol applications, good water quality must
be maintained or the service life of the valve
may be reduced (See Water Quality Guide-
lines). The valve stem must be kept free of de-
bris, deposits, dirt, dust, and scratches or the
packing parts may be damaged resulting in a
packing leak. Control valve hunting will cause
excessive stroking of the valve stem and result
in premature failure of the packing seal. The
system must be stabilized to prevent hunting
to ensure reasonable packing life and optimal
control performance. Oversizing of a control
valve will result in an unstable condition, which
can cause noise, vibration, and premature trim
and packing seal failure. The use of Warren
Controls ValveWorks sizing program will facili-
tate the selection of the optimum valve.
MaIntenance
packInG aDjustMent
parts/ overHaul
series 1800 Heavy Globe control valves
have adjustable packing. If a packing leak is
observed, tighten the hex nuts above the
packing flange ¼ turn and observe. If the leak
continues tighten the hex nuts another ¼ turn
and observe. Repeat as necessary. If the leak
continues and the hex nuts cannot be tight-
ened further with reasonable force replace the
packing and if necessary the stem and plug
assembly.
Damaged or worn parts can decrease perfor-
mance and shorten valve life.
Damaged or worn packing parts including the
packing, bearings, spring, and other bonnet
parts can cause a packing leak resulting in
damage to the actuator, accessories, and sur-
rounding equipment. Damaged or worn pack-
ing parts can also cause increased hysteresis
resulting in poor control.
Damaged or worn trim parts including the
plug, stem, seat ring, piston, piston guide, pis-
ton seal, and o-ring can cause increased hys-
teresis, poor control, excessive internal leak-
age, and poor shut-off. Damaged or worn trim
parts can also cause damage to the packing
parts resulting in a packing leak.
Damaged or worn body gaskets or o-ring
seals can cause external leakage resulting in
damage to the actuator, accessories, and sur-
rounding equipment.
Should parts become worn or damaged, parts
kits are available. Repack Kits are available to
replace the packing. Repack/Inspection Kits
are available to allow the valve to be opened
for inspection of its internal parts. Rebuild/Re-
pack Kits are available to completely rebuild/
overhaul the valve. Parts kits come with com-
plete step-by-step instructions. Each kit has its
own part number. Please provide the valve’s
serial number to ensure getting the correct kit
part number and correct parts.
Do not
atteMpt to servIce wItHout a
repack/InspectIon kIt & suppleMental InstructIons.
!