Tri Lok
®
Cryogenic Valve
Installation, Operation and Maintenance Manual
TRI LOK
®
CRYOGENIC TRIPLE OFFSET VALVE
| 6
6.0 TRAVEL STOP SETTING INSTRUCTIONS
Preface
Tri Lok is a quarter turn, metal-seated triple offset valve
There is no mechanical stop in the valve at the “closed”
position
Purpose
The following travel stop-setting instructions are designed
to provide a maintenance or service person clear direction
and procedures for executing these important 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
1 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
2 Rotate BOTH valve and actuator to either the full
“open” or full “closed” position to establish a common
reference point
3 Mount actuator to the valve and secure
Notes:
•
With valve/actuator in the closed position, it may be necessary
to loosen the “closed” mechanical stop to allow the mounting
holes to align properly
• Special applications may require more specific instructions
Please consult the factory for further instruction
Valves can be damaged if proper care is not exercised during
the setting of Open and /or Closed stops
Actuator Stop Settings
The Tri Lok 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 excessive torque
5 Tighten the stop lock nut with the torque specified in
the actuator operating manual
6 Mark the closing stop set position