ENGINEERED & PROCESS VALVES
22
01/2011 / IOM-TK-TMBV-01
Installation, Operation and Maintenance Manual
TROUBLESHOOTING
Trouble Probable Cause Remedy
The valve is hard to operate
Ball is not properly aligned with bores of seats.
Erratic Operation
Valve is leaking between tailpiece and body
Leakage around valve stem
Valve will not fully close
Grease fitting leaking
Valve will not seal
Actuator Unit
Infrequent operation -
lack of lubrication
Ice in valve operator
There is a build up in the seat area due
to line contaminates
Restrictions in bore of valve or
stop not set properly
Damaged actuator unit
Restriction of pneumatic actuator vent
Faulty power supply
Infrequent operation -
lack of lubrication
Damaged O-ring seal
Damaged O-ring seal
Ice in body of valve
Improper setting of actuator limit
switches or stops in worm gear
Infrequent operation -
lack of lubrication
Damaged Fitting
Trash in fitting
Contamination around seat area due to service
Damaged seat face or seat O-ring
Valve not fully closed
Refer to actuator maintenance manual or
remove actuator cover and check stem adapta-
tion and linkage for damage.
Lubricate actuator with suitable industrial
grease
Apply heat or inject antifreeze solution into
valve, but consult with authorized dealer prior
to using remedy on operators.
Clean the seat area as outlined in Routine Seat
Cleaning.
Remove bore restrictions or check stop in worm
gear actuator and/or actuator limit switches.
Replace broken or damaged parts
Remove restriction
Check power supply
Lubricate actuator with suitable industrial
grease
Disassemble and replace O-rings.
Inject valve sealant into stem fitting (if present)
or replace stem O-ring.
Apply heat or inject antifreeze solution into
body of valve. Drain periodically to eliminate
water accumulation.
Reset actuator limit switches or stops for proper
closing
Lubricate actuator with suitable industrial
grease.
Tighten safety cap or replace safety cap if
damaged
WARNING: Never remove entire grease fitting
when valve is under pressure.
Inject a small amount of cleaner into fitting to
dislodge trash.
Clean the seat area as outlined in Routine Seat
Cleaning.
Inject seat sealant for temporary seal or replace
seats
Check that operator or limit-switches do not
stop the rotation of ball prior to reaching the
fully closed position.
ENGINEERED & PROCESS VALVES