Warren Controls 3800 Series E-BALL ROTARY CONTROL VALVES - Manual (Page 11)

11 Series 3800 3800_IOM_RevB_0513
Series 3800 E-Ball Rotary Control Valves are for the most part mainte-
nance 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 3800 Product Specification for details). In installations where
high vibration exists, pneumatic and/or electrical connections should
periodically be checked for integrity. Control valve hunting will cause
excessive stroking of the valve stem. 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 con-
dition, which can cause noise, vibration, and premature trim and pack-
ing seal failure. The use of Warren Controls ValveWorks sizing program
will facilitate the selection of the optimum valve. RP Pneumatic Rack & Pinion Actuators are for the most part mainte-
nance free when properly selected and installed. Rebuilding of the ac-
tuator should not be necessary under normal operating conditions. For
best operation follow installation guidelines (See Installation section),
maintain the ambient temperature within the limits of –10F to195F, and
maintain a clean dry oil-free air supply. Damaged or worn actuator seals
can cause poor response to the air signal, increased hysteresis, and poor
shut-off by allowing air pressure to leak from the actuator. Damaged or
worn actuator seals can also allow dirt and contaminants to enter the ac-
tuator shortening its the life. Should the seals become damaged or worn
an actuator seal kit is available. Contact the factory for details. To ensure
getting the correct parts, please provide the valve’s serial number.
Series 3800 E-Ball Rotary Control Valves have either self-adjusting pack-
ing or adjustable packing. Valves with Packing Type T Teflon V-ring,
have self-adjusting packing and require no external adjustment. Prop-
erly maintained, the typical life expectancy of this packing type exceeds
five years. If the valve has self-adjusting packing and a packing leak is
observed replace the packing and if necessary the stem and plug as-
sembly. Valves with Packing Type G Graphite, J Graphite, or A Teflon V-ring 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 tightened further with
reasonable force replace the packing and if necessary the stem and plug
assembly. Over tightening the hex nuts may create excessive friction be-
tween the packing and the valve shaft causing sticking and poor control.
MAINTENANCE
PACkINg ADjUSTMENT