Burkert 2657 Instructions De Service page 20

CAuTIoN!
danger when using volatile media!
If volatile media such as hydrogen peroxide (H2O2) or sodium
hypochlorite (NaCIO) are used, there is a serious risk of injury. The
media may evaporate causing a dangerous pressure increase in
the empty space between the ball and the housing.
• If you have any questions regarding safety, please contact our
sales offices (telephone no. or address can be found on the last
pages of this manual).
20
english
Type 2657
Installation
7.4.1. installation in the pipeline
procedure:
→
Check that the pipes which are to be connected to the valve are on
one level. This will prevent mechanical tension on the screw joint.
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Unscrew the union nuts (
pipes.
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Bond, weld or screw the connecting parts (
ball valve onto the pipe ends.
Also follow the detailed instructions in chapter
7.2.Installation Process.
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Place the plastic ball valve between the two connecting parts and
tighten the union nuts by hand.
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Do not use a tool to tighten the union nuts as their surfaces could
be damaged.
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If required, attach the pipeline with brackets or use the designated
bracket on the plastic ball valve.
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Install the appropriate Dual Block locking device for the union nuts
(Fig. 2: /16) on the housing.
Fig. 2: /13) and push them onto the
Fig. 2: /12) of the plastic