Richter KNA-D/F Series, Installation And Operating Manual

Page: 12 / 32

Series KNA/F, KNAP/F, KNA-D/F, KNAP-D/F,
Page 12
KNA-S/F, KNAP-S/F
to ASME
9520-030-en Revision 19
TM 10477 Edition 05/2022
9 Maintenance
♦
All repair work is to be performed by qualified
personnel using the appropriate tools.
♦
For the arrangement, designation and item
numbers of all parts of the valve, see section 10 .
♦
Spare parts are to be ordered with all the details in
acc. with the valve identification.
♦
Only original spare parts may be installed.
♦
To prevent leaks, a regular check of the connection
screws should be made in line with the operating
requirements.
♦
For tightening torques, see section 1.3 .
9.1 Dismantling ball valve with
ball/stem unit
9.1.1 Ball valve with lever
♦
Remove lever 203 .
♦
Take out grounding spring washer 557 .
♦
Dismantle packing gland follower 503 and spring
gland follower 502 .
♦
The thrust ring 405/1 , packing bellows 403 and
retaining washer 526
(not in 6" 8“/6“ and 8”) are
one unit and it is levered out using 2 screwdrivers.
♦
Undo screw connection body end piece 102 / main
body 101 .
♦
Remove body end piece 102 .
♦
Remove ball/stem unit 201 in closed position.
Make sure that you do not damage the body lining.
♦
Remove seat rings 401 .
9.1.2 Packing bellows
♦
Remove retaining washer 526 .
♦
Separate thrust ring 405/1 and packing bellows
403 by pushing them apart.
9.1.3 Ball valve with actuator
♦
Remove actuator 850 and coupling 804 .
♦
Dismantle packing gland follower 503 and spring
gland follower 502 .
♦
Remove bracket 510 .
♦
Further dismantling is performed as described in
Section 9.1.1 and 9.1.2 .
9.2 Assembly
♦
Prior to assembly all parts are to be cleaned and
the plastic-lined parts checked for damage.
♦
Insert seat rings 401 in the main body 101 and
body end piece 102 .
♦
Mount ball/stem unit 201 in closed position. Make
sure that you do not damage the body lining.
An additional bore in the ball/stem unit, e.g. for
cavity-free, must lie on the p1 side in the closed
position. See also
section 6.2 .
♦
Mount body end piece 102 . Tighten the greased
housing screws cross over with a tightening torque
according to
section 1.3 .
9.2.1 Packing bellows
♦
Press thrust ring 405/1 into packing bellows 403 .
♦
Install retaining washer 526
(not in 6”, 8“/6“ and
8”).
♦
Press unit into main body 101 .
♦
Press in grounding spring washer 557 .
9.2.2 Ball valve with lever
♦
Mount lever stop 577 , spring gland follower 502 (at
3", 4", 6", 8“/6“ and 8” are 2 spring gland followers)
and packing gland follower 503 . Tighten packing
nuts until there is no gap between packing gland
follower and spring gland follower. See
Chapter
1.3 and 10.2 .
♦
Seal any tapped bores still open with plugs.
♦
Mount lever 203 .
9.2.3 Ball valve with actuator
♦
Mount spring gland follower 502
(at 3", 4", 6", 8“/6“
and 8” are 2 spring gland followers) and packing
gland follower 503 . Tighten packing nuts until there
is no gap between packing gland follower and
spring gland follower.
See Section 1.3 and 10.3 .
♦
Mount bracket 510 with the opening at right angles
to the direction of flow. See sectional drawing in
Chapter 10.3 and 10.7 .
♦
Mount coupling 804 and actuator 850 . Observe the
actuator position in accordance with the actuator
operating manual.
♦
Observe the ball/stem position in accordance with
the position of the actuator.