16
APV_DKR2_DE-9_032019.indd
Double Seat Ball Valve
DELTA DKR 2
Instruction Manual: UK - rev. 9
APV
UK
12. Service Instructions
12.5.2. Adjustment of operating position without FG flanges
*1) *2)
If FG flanges are not available, the ball can, in exceptional cases,
be adjusted as follows.
Caution! Failure of adjustement is possible:
Install the ball seals as described in 12.3.
Assemble the valve as described in 12.4.
Turn the ball into its exact open position.
1.
Control actuator (15) with pneumatic air (min. 6 bar) and place it on
the yoke.
2.
Screw in screws (16), but do not tigthen them.
Caution!
Do not reach into the open valve after installation
of the actuator!
Risk of injury by sudden operation of the valve.
! The ball must be in its exact open position!
3.
Slightly turn the actuator in anticlockwise direction to adjust the play
in the connecting parts.
! The ball must not move during this process!
(exact open position)
At first, tighten the screws (18) and then tighten the screws (16).
Operate the turning actuator several times to check the operating
accuracy of the ball.
4.
Shut off the air supply to the turning actuator and insert the valve in
closed position into the line system. Fasten it with the screws (20).
5. Centering of ball (absolutely necessary)
To center the ball between the seal rings, proceed as follows:
1)
Release screws (3) by about ¼ turn.
2)
Release one screw (18) by about ¼ turn.
3)
Release second screw (18) by about ¼ turn and retighten it
immediately.
Caution!
Hold the turning actuator fast during this process.
Bring up holding moment in clockwise direction
(top view of actuator).
6.
Tighten screw (18) and, then, screw (3).
7.
Tightening torque: Md = 16 Nm
M8
Md = 40 Nm
M10
8.
Connect pneumatic air line with turning actuato
9.
Connect cleaning line.
10.
Attach valve position indication.
*1) We recommend the procedure according to 12.5.1.
*2) For DKRX special valves for horizontal installation, the
adjustment according to 12.5.2 is not suited!
16
18
3
15
20
20
3
!
