Cameron TYPE 31 Installation, Operation And Maintenance Manual page 7

Rotary Vane Style Operator (4 Bar Type)
1. Make sure that operating the valve to the fully
open and fully closed position will not disrupt
current operation of line.
2. Loosen the open and closed stop screw locknuts.
3. Turn stop screws clockwise to increase travel.
4. If equipped with a manual override, use it to
operate the valve to the fully open position.
5. Check the stem stop viewports to verify valve
position. (Refer to Open and Closed Viewports
on page 6.)
6. Turn the open stop screw counter-clockwise until
it stops and tighten the locknut.
CAUTION: Once the stop makes contact with
the vane, do not continue to turn the screw.
Continuing to turn the screw could move the
valve off the stops.
7. If the stop screws will not turn repeat steps 3
and 4.
8. To set the closed stop, repeat steps 3 - 6,
operate the valve to the closed position and use
the closed stops.
Scotch Yoke Style Operator
1. Make sure that operating the valve to the fully
open and fully closed position will not disrupt
current operation of line.
2. Loosen the open and closed stop screw locknuts.
3. Turn stop screws counter-clockwise to increase
piston travel.
4. If equipped with a manual override, use it to
operate the valve to the fully open position.
5. Check the stem stop viewports to verify valve
position. (Refer to Open and Closed Viewports
on page 6.)
6. Turn the open stop screw clockwise until it stops
and tighten the locknut.
CAUTION: Once the stop makes contact with
the vane, do not continue to turn the screw.
Continuing to turn the screw could move the
valve off the stops.
7. If the stop screws will not turn repeat steps 3
and 4.
8. To set the closed stop, repeat steps 3 - 6,
operate the valve to the closed position and
use the closed stops.
Installation, Operation and Maintenance Manual
E N G I N E E R E D V A L V E S
Figure 6 - Rotary Vane-Style Operator.
Figure 7 - Scotch Yoke-Style Operator.
5
CLOSE
C/L OF PIPELINE
CLOSED STOP
OPEN STOP
IOM-CAM-BALL-T31