User Manual

8
Siemens A6V11974394de
Smart Infrastructure 2020-12-21
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 a ball valve together with media based on potassium formate such as Hycool or
Temper may result in leakage via stem to the outside. This is caused by the high creeping
ability of media based on potassium formate at low surface tension.
Siemens rejects any and all liability for damages or consequential damages caused by the
use of these media in combination 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 VBG60.. is supplied together with mounting instructions M4214 (74 319 0923 0).
Mounting position
VBG60..
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 in the ball vaves.
● Place the pliers/wrench on the ball valve union nut that is closer to the pipe to be
tightened or loosened.