5 Maintenance
Study the instructions carefully. The items refer to the parts list and service kits section.
LKB UltraPure: For ISO, DIN and ASME tubes.
Lubricate the seal ring before fitting it.
Lubricate the disc stem before fitting the bushes.
5.3
Valve assembly
Step 1
1. Lubricate the pin holes in seal ring (5), (important for Silicone
and Viton).
2. Fit valve disc (2) in the seal ring (5).
NOTE!
For the valve sizes 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
Step 2
1. Fit bushes (3,4) on the disc stem.
2. Fit seal ring (5) together with valve disc (2) between the two
valve body halves (1).
CAUTION!
Rotate the valve disc so that the valve is open before tightening
screws and nuts (6).
TD 403-266
Step 3
Valve with handle:
1. Fit screws and nuts (6) and torque tighten in accordance with
the requirements (see Step 5).
2. Fit the complete handle on the disc connection and tighten
the screw on the handle.
NOTE!
This also applies for the Lockable Multiposition Handle.
TD 403-267
Step 4
Valve with actuator:
1. Fit the actuator with the bracket so that the disc connection
enters the coupling (see 3.4 Fitting actuator/bracket/handle
on the valve (optional extras)).
2. Fit screws and nuts (6) and torque tighten in accordance with
the requirements so that the bracket is fixed to the valve (see
Step 5).
TD 403-268
Fit correctly!
See 3.4 Fitting actua-
tor/bracket/handle on the
valve (optional extras)
Step 5
Pre-use check: Check that the valve disc moves smoothly against the seal ring.
Pay special attention to the warnings!
Tools/torque values for assembly of the valve body halves:
1”
1½”
2”
2½”
3”
4”
25 mm
38 mm
51 mm
63.5 mm
76 mm
101.6 mm
Valve size
DN 25
DN32
DN40
DN50
DN65
DN80
DN100
5 mm
5 mm
5 mm
6 mm
6 mm
6 mm
8 mm
Allen Key
(0.2”)
(0.2”)
(0.2”)
(0.24”)
(0.24”)
(0.24”)
(0.3”)
18 Nm
18 Nm
18 Nm
20 Nm
20 Nm
20 Nm
38 Nm
Recomm.
Torque
(13 lbf-ft)
(13 lbf-ft)
(13 lbf-ft)
(15 lbf-ft)
(15 lbf-ft)
(15 lbf-ft)
(38 lbf-ft)
18
