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National safety regulations
Failure to comply with national safety regulations may result in personal injury and property
damage.
●
Observe national provisions and comply with the appropriate safety regulations.
Engineering
We recommend installing the ball valve with spring return since temperatures are lower on
heating plants which increases the lifespan of the sealing gland on the stem.
Ensure there is no cavitation (see Section Technical design [➙ 2]).
A filter must be installed upstream of the ball valve to increase functional safety.
Permissible media
Using the ball valve together with potassium formate-based media can result in leakage over
the stem to the outside. The reason is the high level of penetration at low surface tension of
media based on potassium formate.
Siemens rejects any and all liability for damages or consequential damages resulting from
the use of this media together with our ball valves.
Mounting
It is easy to assemble the ball valve and rotary actuator; it can be done at the construction
site. No special tools or settings required.
Ball valve VAG61.. / VBG61.. is supplied together with mounting instructions M4212
(74°319°0922°0).
Mounting position
VAG61..
Pipe connection
Avoid leakage:
●
Install fittings as per ISO 7-1. Ball valves (internal threading) = "Rp";
Piping (external threading) = "R".
●
Do not use too much hemp or PTFE tape.
●
Do not tighten pipe threading to the very end.
●
Place the pliers/wrench on the ball valve union nut that is closer to the pipe to be
tightened or loosened.
Siemens
Smart Infrastructure
CAUTION
VBG61..
11
N4212en
2019-06-04
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