Warren Controls 2800 Series Precision Globe Control Valves - Manual (Page 10)

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2600 Emrick Blvd • Bethlehem, PA 18020 • USA •800-922-0085 • www.warrencontrols.com
series 2800 Precision 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 operation
follow installation guidelines (See Installation sec-
tion); maintain the fluid pressure, temperature,
flow, flowing differential pressure, and shut-off
differential pressure within the limits of the valve
(See Series 2800 Product Specification for de-
tails). 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
Guidelines). The valve stem must be kept free
of debris, 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 per-
formance. 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 facilitate the selection of the
optimum valve.
MAINTENANCE
PACKING ADJUSTMENT
PARTS/ OVERHAUL
series 2800 Precision globe control
Valves have either self-adjusting packing or
adjustable packing. Valves with Body Material B
Bronze and Packing Type T V-ring, V Vacuum
Service, or L Lip Packing have self-adjusting
packing and require no external adjustment. If
the valve has self-adjusting packing and a pack-
ing leak is observed replace the packing and if
necessary the stem and plug assembly.
Valves with Body Material B Bronze and Packing
Type G Graphite have adjustable packing. Valves
with Body Material S CF8M and Packing Type T
V-ring, G Graphite, or V Vacuum Service Pack-
ing also have adjustable packing. If the valve
has adjustable packing and a packing leak is
observed, tighten the packing nut ¼ turn and
observe. If the leak continues tighten the pack-
ing nut another ¼ turn and observe. Repeat as
necessary. If the leak continues and the packing
nut cannot be tightened 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 dam-
age to the actuator, accessories, and surround-
ing equipment. Damaged or worn packing parts
can also cause increased hysteresis resulting in
poor control.
Damaged or worn trim parts including the plug,
stem, seat ring, piston, and o-ring can cause
increased hysteresis, poor control, excessive
internal leakage, 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 surrounding
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/Repack
Kits are available to completely rebuild/ overhaul
the valve. Parts kits come with complete 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.
!