VAG Operation and Maintenance Instructions • 7
In case of submerged installation, increased actuation forces and
increased wear and tear (sometimes also accompanied by cor-
rosion) of the relatively moving parts are to be expected. This
must be taken into account when determining the maintenance
interals.
If the valve is installed as an end-of-line valve, it must be ensu-
red that its free outlet side is not accessible to interference from
any source.
Caution:
Installing the valve in the wrong location may cause
excessive dynamic torque and damage the valve.
4.2.1 Installations in the pipeline upstream and
downstream of the valve /
Caution
• If the valve is used in contaminated media, a filter with a suita-
ble mesh size must be provided upstream of the valve in order
to prevent malfunction.
• Directly upstream of (3 x Valve size) ) and downstream of (3 x
Valve size) the VAG EKN
®
Butterfly Valve an inspection valve,
an elbow, T-pieces and Y-filters should be provided as other-
wise irregular flow may disturb the proper function of the VAG
EKN
®
Butterfly Valve.
• A damping zone between the branch/elbow and the valve is
ideal.
Picture 5: Installation of the VAG EKN
®
Butterfly Valve at elbows and branches
unfavourable
ideal
3 X
Valve
size
EKN
®
EKN
®
favourable
EKN
®
