Bray Triple Offset - Manual (Page 20)

18 O & M
A D i v i s i o n o f B r a y I n t e r n a t i o n a l , I n c .
The Ultimate Critical Service Triple Offset Valve
O p e r a t i o n a n d M a i n t e n a n c e M a n u a l
12.0 - Tri Lok Troubleshooting Guide
Symptom Possible Cause Resolution
Valve won’t rotate
1) Packing is too tight. 1) Loosen packing nuts and set the
torque according to its torque table.
2) Actuator has failed. 2) Repair or replace.
3) Valve not cleaned before assembling
and presence of solid particles on
bushing/stem or bottom plate area.
3) Disassemble the valve, flush and clean.
Check if any valve part is damaged
and replace as required. Reassemble
the valve
4) Stem keys lost or not engaged with
actuator.
4) Insure proper engagement between
valve and actuator.
Stem packing leaking
1) Packing nuts too loose. 1) Tighten packing nuts according to
packing torque table.
2) Packing damaged. 2) Replace the packing.
Bottom plate/plug leaking
1) Bottom flange bolting/plug loose. 1) Tighten flange bolting/plug according
to their torque table.
2) Gasket damaged. 2) Replace the gasket.
Valve leaking
1) Debris trapped between disc seal ring
and seat.
1) Cycle and flush (with the valve open)
to remove debris.
2) Seat or Disc seal ring gasket leaking. 2) Check the cap screws torque. If
necessary, tighten according to the
appropriate torque. If leak continues,
replace gaskets.
3) Actuator mechanical stops set
improperly.
3) Reset travel stops according to
section 6.
4) Disc seal ring or seat damaged. 4) Replace.
5) Actuator torque set improperly. 5) Adjust torque output according to
actuator manufacturer instructions.
Jerky operation
1) Packing is too tight. 1) Loosen packing nuts, cycle the valve
and tighten the nuts according to
packing torque table.
2) Inadequate air supply to pneumatic
actuator.
2) Increase actuator size, air supply,
and/or volume.
3) Actuator/stem adapter misaligned. 3) Remove the actuator mounting and
realign or replace.