Bray Triple Offset - Manual (Page 8)

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
6 O & M 6 O & M
7.0 Travel Stop Setting Instructions
Preface
Tri Lok is a quarter turn, metal-seated valve. There is
no mechanical stop in the valve at the “closed” position.
Purpose
The following stop-setting instructions are designed to
provide a maintenance or service person clear direction
and procedures for executing these important travel
stop adjustments.
Methodology
When installing ANY type of actuator on a Tri Lok
valve, the following general instructions should be
followed closely. These general instructions include all
actuation types: manual gear, pneumatic, hydraulic and
electric actuators.
A. Select a desired orientation for the actuator
mounting relative to the valve. The disc should be
oriented with the disc indicator marked on the stem.
B. Rotate BOTH valve and actuator to either the full
“open” or full “closed” position to establish a
common reference point.
C. Mount actuator to the valve and secure.
!
CAUTION
Valves can be damaged if proper care is not exercised
during the setting of Open and /or Closed stops.
Actuator Stop Settings
The trilok valve is a torque seated valve. During normal
operation, only the open mechanical stop on the actuator
should function. Set the opening stroke stop to stop the
disc rotation in the fully open (90°) position.
For safety reasons, the closed mechanical stop shall be
set as follows:
1. Unscrew the closing stroke mechanical stop.
2. Close the valve applying the correct end-to-close
torque required for the particular service. Check that
the mechanical stop is free.
3. Adjust mechanical stop until engagement.
4. Loosen the mechanical stop 1-1½ turns to ensure
there is enough travel for the valve to receive the
required torque and to protect the valve from an
excessive torque.
5. Tighten the stop lock nut with the torque specified in
the actuator operating manual.
6. Mark the closing stop set position.
Notes:
s
necessary to loosen the “closed” mechanical stop to
allow the mounting holes to align properly.
s
instructions. Please consult the factory for further
instruction.