9
Flow direction
Function NC Function NO
Function NC
The pilot valve is
installed in such a
way that the manual
emergency actuation
points in the direction
opposite to the
direction of ow
arrow.
Function NO
The pilot valve is
installed in such a
way that the manual
emergency actuation
points in the same
direction as the iden-
tication for the ow
direction.
Fig. 4: Valve functions (NC/NO)
5.6 Setting the switching times
The closing and opening times of the valve can be changed if required
with the side throttle screws.
NOTE!
Pressure surges caused by liquid media and short closing times.
• If closing times are fairly short, liquid media cause higher pressure
surges. These may reduce the service life of the diaphragm and
destroy other devices and components in the system.
CAUTION!
Discharge of medium if the throttle screws are unscrewed too far.
Extending
closing times
Extending
opening times
Reducing
closing times
Reducing
opening times
Fig. 5: Extending / reducing switching times
Shorten closing
times
Fig. 6: Shorten closing times for DN13 stainless steel