13
APV_DKR2_DE-9_032019.indd
Double Seat Ball Valve
DELTA DKR 2
Instruction Manual: UK - rev. 9
APV
UK
12. Service Instructions
The item numbers refer to the spare parts drawing.
DN design: RN 01.071; Inch design: RN 01.074)
12.1. Dismantling from the line system
1.
Shut off connecting lines, let off line pressure and discharge if
possible.
2.
Disconnect pneumatic and electric connections.
3.
Dismantle cleaning line.
4.
Screw off valve position indication.
5.
Remove flange screws (20).
6.
Detach ball valve from the flanges.
12.2. Dismantling of seals and guide bands
1.
Detach flange seals (8/8a).
2.
Take off turning actuator (15) after removal of screws (16).
3.
Release screws (18) and yoke, coupling, indicator and spray
connection
Caution!
Do not replace seals before removal of turning
actuator from the valve.
4.
Pull out PTFE ball seals (9/9a) with appertaining housing seals
(7/7a).
To pull the ball seals out, half open the ball by hand and grasp
alternately behind the seal.
Caution!
Ball and ball seal are sensitive to mechanical
damage, the surfaces must not be touched by tools.
5.
Having released the screws (3), slide both shaft bearings (2/22) out
of the housing and replace O-rings (5, 6) and guide bands (4).
Caution!
With dismantled shaft bearings and seals, the
housing with ball must not be subject to vibrations.
16
18
20
3
2
8/8a
7/7a
5, 6, 4
15
9/9a
2, 22
!
!
!
