Alfa Laval LKB, Instruction Manual

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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 the disc stem before fitting the bushes.
5.5 Assembly of valve - LKB-F
S Stteepp 11
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
NO OTTE 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 Stteepp 22
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
CA AU UTTIIO ON N!!
Rotate the valve disc so that the valve is open before tightening
screws and nuts (6).
S Stteepp 33
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 Stteepp 44
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 Stteepp 55
P
Prree--uussee cchheecckk:: Check that the valve disc moves smoothly against the seal ring.
P
Paayy ssppeecciiaall aatttteennttiioonn ttoo tthhee w waarrnniinnggss!!
Tools/torque values for assembly of the valve body halves:
2255 m mm m 3388 m mm m 5511 m mm m 6633..55 m mm m 7766 m mm m 110011..66 m mm m
V Vaallvvee ssiizzee
D DN N 2255 D DN N3322 D DN N4400 D DN N5500 D DN N6655 D DN N8800 D DN N110000 D DN N 112255 D DN N115500
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)
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