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Idiomas disponibles
CENTERLINE Butterfly Valves Type VIA/RS
DN 40-600
CENTERLINE Butterfly Valves Type VIA/RS are desi-
gned for installation between weld neck flanges DIN
2632 PN 10, DIN 2633 PN 16 or ANSI B 16.5 Class 150.
(When using other flanges check with factory.)
The outside diameter of the wafer type bodies has been
designed so that centering takes place through the flan-
ge bolts.
Lug type bodies have tapped lugs in which the flange
bolts are screwed from either side. The bolt length must
be chosen such that they do not contact each other
when the valve is installed (recommended bolt length
see information sheet RS/DB-0013-UK).
Lug type bodies self centre during assembly. They can
as well be mounted one-sidedly on a pipeline as end of
line parts. In case of usage as end of line part, it is
necessary to use a counter-flange in accordance with
DIN2632 PN10, DIN2633 PN16 or ANSI B16.5 Class
150. By this means, an absolute tightness is ensured. In
the case of gases, application as end of line part is not
permissible. CENTERLINE Butterfly Valves Type VIA/RS
have no prescribed flow direction and may be installed
arbitrarily. In case of the application of media with the
tendency of depositing solid matters, we recommend an
installation by means of a horizontally positioned spindle
in such a way that the lower valve disk seal opens up in
the direction of flow.
The seat ring (liner) forms the flange seal. Separate
gaskets should not be used.
1. Installation
Installation is simply and speedily achieved as follo-
ws:
1.1 Close the valve and slide it in between the flanges.
1.2 Insert the flange bolts and tighten evenly.
1.3 Test the functioning of the valve by opening and clo-
sing it.
2. Maintenance
Normally, CENTERLINE Butterfly Valves Type
VIA/RS do not require any maintenance, such as
lubrication. If necessary individual components may
be readily and speedily replaced using standard
tools.
3. Removal from pipeline
The valve should be removed from the pipeline in
the following manner:
3.1 Ensure that the line pressure has been released.
3.2 Close the valve.
3.3 Remove the flange bolts and lift the valve out of line.
4. Disassembly
4.1 Open the valve fully.
4.2 Unscrew the actuator/lever fastenings and remove
the actuator/lever assembly.
4.3 Remove the anti blow out screw (12) and withdraw
the upper stem (4) with circlip (8) and upper bushing
from the body (1).
4.4 Remove the lower stem retention pin (6) and with-
draw the lower stem (5) from the body (1).
4.5 Push the disc (2) out of the seat (3) Do not tilt. For
DN350-600 remove bushing (11) from disc.
4.6 Slide the seat (3) out of the body (1).
5. Assembly of the valve
Reassemble the valve in the reverse order of disas-
sembly described in section 4. Grease should be
applied to the outside diameter of the seat, the
upper and lower stems and the spindle retention bolt
prior to assembly.
When replacing the stem (4) align the square-ends
with the broached holes in disc (2); do not force or
drive stems if mis-aligned.
**Recommended grease: OKS 462
Fa. OKS Triebstr. 9, D-80993 München
5
GB
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