December 2019
Installation, Operation and Maintenance Manual
MAN-02-05-62-0742-EN Rev. 0
BHH Mounting
4.3
BHH Mounting on Ball Valve
1.
The ball is turned into the position where the bore in ball and housing are in line.
2.
The actuator is turned into fully open position.
3.
The adapter is mounted on the valve stem.
4.
The actuator is mounted on the valve, so that the indicator groove is following the
valve bore best possible. The screw is tightened loosely against the banana washer.
5.
Check that there is no gap between actuator and adaption flange.
6.
Check that there is no gap between adaption flange and valve flange.
7.
It has to be assured that there is proper contact in sealing area and around bolt areas.
8.
The backlash between adapter and stem is absorbed by turning the actuator
counter-clockwise and then tighten the adjusting screws.
9.
Tighten all screws and operate the actuator about 10 times into closed and
afterwards into open position to check that the stem does not seize.
(Throttle speed!)
10.
Check that the bore of the ball is in line with the bore of the housing.
11.
If not so, the adjusting screws are adjusted until the bores are in line.
12.
The adjustment shall always be completed with operation as under item 5 and
afterwards a final check.
13.
If it is doubtful whether the valve has sufficient covering in closed position, this can
be checked as follows: The valve is operated into intermediate position, and the
ball is greased close to the closing edge.
14.
The valve is turned into closed position and then back into intermediate position.
The distance, where the grease is scraped off, should be 2 - 3 mm. If it is shorter,
please contact Emerson.
15.
The screw is tightened against the banana washer, and the adjusting screws
are tightened.
Figure 7
Relief hole position, when valve is
in closed position.
VALVE IN CLOSED POSITION
UPSTREAM
DOWNSTREAM
15
Section 4: BHH Mounting
