16
APV_DKR2 ATEX_UK-0_022018.indd
UK
Double Seat Ball Valve DELTA DKR2
ATEX Design
Instruction Manual: UK-0
APV
4, 5, 6
3
2
12. Service Instructions
The item numbers refer to the spare parts drawing.
RN ATEX 01.071
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 indicator
5.
Remove flange screws (20).
6.
Detach ball valve from the flanges.
12.2. Dismantling of seals and guide band
1.
Detach flange seals (8).
2.
Take off turning actuator (15) after removal of screws (16).
3.
Release screws (18) and yoke (17), coupling (14), indicator (13),
spray connection(10) and spring for potential equalization (21).
Danger!
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!
Attention!
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).
Attention!
With dismantled shaft bearings and seals, the
housing with ball must not be subject to vibrations.
15
17
10
21
13
14
16
18
20
9/9a
2/22
7/7a
8