Alfa Laval LKB - Valve Assembly (LKB-F)

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5 Maintenance
Read the instructions carefully. The items refer to the parts list and service kits section.
LKB-F: With flange connection.
Lubricate the seal rings before fitting them.
Lubricate t he disc stem before fitting the bushes.
5.5 Assembly of valve - LKB-F
S
S
t
t
e
e
p
p
1
1
1. Lubricate the pin holes in seal ring (5), (important for Silicone
and Viton).
2. Fit valve disc (2) on seal ring (5).
3. Fit bushes (3,4) in the disc stem.
N
N
O
O
T
T
E
E
!
!
For valve size 25-38 mm and DN25-40, it is recommended to fit the
valve disc by using a special service tool (item no. 9611981090).
TD 403-265
S
S
t
t
e
e
p
p
2
2
1. Lubricate flange seal rings (8) with water and fit them.
2. Fit seal ring (5) together with valve disc (2) between the valve
body halves (1).
3. Fit and tighten the two centre screws and nuts (6).
C
C
A
A
U
U
T
T
I
I
O
O
N
N
!
!
Rotate the valve disc so that the valve is open before tightening
screws and nuts (6).
S
S
t
t
e
e
p
p
3
3
1. If supplied, fit the handle and tighten the screw.
2. If supplied, fit the actuator.
3. Fit the two upper screws and nuts (6), (4 nuts).
S
S
t
t
e
e
p
p
4
4
1. Fit the valve unit between flanges (7).
2. Fit and tighten the two lower screws and nuts (6).
3. Tighten the two upper screws and nuts (6).
S
S
t
t
e
e
p
p
5
5
P
P
r
r
e
e
-
-
u
u
s
s
e
e
c
c
h
h
e
e
c
c
k
k
:
:
Check that the valve disc moves smoothly ag
ainst the seal ring.
P
P
a
a
y
y
s
s
p
p
e
e
c
c
i
i
a
a
l
l
a
a
t
t
t
t
e
e
n
n
t
t
i
i
o
o
n
n
t
t
o
o
t
t
h
h
e
e
w
w
a
a
r
r
n
n
i
i
n
n
g
g
s
s
!
!
Tools/torque values for assembly of the valve body halves:
2
2
5
5
m
m
m
m
3
3
8
8
m
m
m
m
5
5
1
1
m
m
m
m
6
6
3
3
.
.
5
5
m
m
m
m
7
7
6
6
m
m
m
m
1
1
0
0
1
1
.
.
6
6
m
m
m
m
V
V
a
a
l
l
v
v
e
e
s
s
i
i
z
z
e
e
D
D
N
N
2
2
5
5
D
D
N
N
3
3
2
2
D
D
N
N
4
4
0
0
D
D
N
N
5
5
0
0
D
D
N
N
6
6
5
5
D
D
N
N
8
8
0
0
D
D
N
N
1
1
0
0
0
0
D
D
N
N
1
1
2
2
5
5
D
D
N
N
1
1
5
5
0
0
Spanner
flats
10 mm
(0.4”)
10 mm
(0.4”)
10 mm
(0.4”)
13 mm
(0.5”)
13 mm
(0.5”)
13 mm
(0.5”)
17 mm
(0.67”)
17 mm
(0.67”)
17 mm
(0.67”)
Recomm.
torque
18 Nm
(13 lbf-ft)
18 Nm
(13 lbf-ft)
18 Nm
(13 lbf-ft)
20 Nm
(15 lbf-ft)
20 Nm
(15 lbf-ft)
20 Nm
(15 lbf-ft)
38 Nm
(28 lbf-ft)
38 Nm
(28 lbf-ft)
38 Nm
(28 lbf-ft)
23