4.650B_UK - 2
Ref. 4.650B_UK - 2015-01-14. www.axel-larsson.se
MANUAL
BALL SECTOR VALVE AL 74-KS / KSP
FLOW DIRECTION
The valve’s performance is equal regardless of flow direction. Alt-
hough it is recommended that the valve is mounted according to the
flow direction arrow.
START-UP
The valve shall be operated and controlled that closing- and opening
functions are correct before start-up. Check that the valve operates
within its max- and minpositions. Limit-switches, positioner, feed-back
signal and torque switches shall be checked for correct function.
Start-up shall be done gradually and under careful attention. If water
hammer, leakage, cavitations or noise occurs in the system they have
to be eliminated before they cause any harm.
DISMOUNTING FROM PIPELINE
Before the valve is dismounted from the pipe, all wiring in form of po-
wer supply and control signals as well as supply air has to be discon-
nected. If the valve is equipped with spring closing/opening actuator
thoroughly check that the valve has taken its fully closed or opened
position
VALVE POSITION INDICATION
The actual position of the ball sector can be defined on the lower
shaft end, opposite to the actuator:
Seat holding ring (item 2)
with seat (item 10)
Shaft (item 5) with
indication groove
Valve body (item 1)
OPEN
CLOSE
DN 25-250
No
Part
1
Body
1A
Flange
1B
Grub screw
2
Seat holding ring
3
Ball sector
4
Bearing sleeve
4A
Split ring
8
Woodruff key
9
Bearing
10
Seat ring
11
Screw
12
Nut
13
O-ring
13A
Sliding ring
14
O-ring
15
O-ring
16
O-ring
PARTS
DN 25-250
Attention!
Check that the pipe is depressurized and drained. Great caution must
be taken when there is a risk for toxic or corrosive media is captured
in the valve!
