April 2022
Installation, Operation and Maintenance Manual
E-90090007 Rev. 0
29
Section 8: Operator End Stop Adjustment
Operator End Stop Adjustment
8.1
SR - End Stop Adjustment Conditions
Condition A:
MOT is more than MVT, which means travel stops on valve instead
of operator.
NOTE:
In
Condition A,
the operator travel needs to be decreased to have valve stroke limited by
operator internal stops.
1.
Install operator on valve and adjust the stem nut as directed in Section 6.
(Installation).
2.
Apply hydraulic pressure to cylinder plate ports to fully retract the drive rod (1)
until the operator stops.
3.
Remove the end stop cover (33) and end stop cover seal (57) to access the end
stop (32).
4.
The end stop (32) will be loose in the end cap (8).
5.
Screw the end stop (32) into the end cap (8) until it stops by contacting the drive
rod (1).
6.
Release hydraulic pressure through cylinder plate ports to allow piston to move
away from end stop (enough to allow one full turn of the end stop).
7.
Screw the end stop (32) further into the end cap (8) by 1/8 in. which is a one full
turn of the end stop.
8.
Reapply pressure to move the piston against end stop. Check that the end stop
(32) is now jammed and locked in place by the drive rod (1).
9.
Install and tighten the end stop cover (33) and end stop cover seal (57) to lock-in
the travel adjustment.
10.
Remove the existing “
MARK #4
”. Mark on the drive rod (1) where it and the
bottom of the cylinder plate (4) align. This is the new, corrected, “
MARK #4
”.
