Operation
5.5.2
Pneumatic connection
Solenoid pilot valves are available for control of the pneu-
matic drive (→ Operating instructions for pilot valve):
–
3/2-way valve for single-acting drives
–
5/2-way valve for double-acting drives
CAUTION
Risk of injury from compressed air!
All work on the pneumatic system must be carried out by
qualified technicians.
Fig. 7
Connect pneumatics
A Connection A
B Connection B
Connect compressed air lines to the pneumatic drive
(→ Fig. 7 Connect pneumatics, Page 9 ).
Control pressure to
connection
Function
A
B
Normally closed (NC)
–
open
Normally open (NO)
–
close
Double acting (DA)
close
open
Tab. 3
Control pressure connections
5.5.3
Check sense of rotation of drive
1. Open and close fitting once via drive.
2. Check position of the fitting at the flow indicator:
–
Position indicator along the pipe: Fitting opened
5.6
Performing the hydrostatic test
Pressure test using neutral medium, e.g. water.
1. Pressurize the fitting, ensuring
–
Test pressure < permissible system pressure
–
Test pressure < 1.5 PN
–
Test pressure < PN + 5 bar
2. Check the fitting for leaks.
6
Operation
6.1
Commissioning
Fitting correctly installed and connected
WARNING
Risk of injury and poisoning due to medium spraying out.
Use personal protective equipment when carrying out any
work on the fitting.
1. Opening and closing the fitting:
–
Hand lever along the pipe: Fitting opened
–
Hand lever perpendicular to the pipe: Fitting closed
2. After the initial stresses due to pressure and operating tem-
perature, check if the fitting is sealed.
6.2
Emergency manual operation
Only with electrically driven ball valve.
6.2.1
Manual emergency operation
1
2
1. Ensure that the electricity supply is interrupted for the elec-
tric drive.
2. Set the clutch switch (2) from AUTO to MAN and hold it.
3. Remove the protective cap (1).
4. Turn the actuator shaft with the aid of an adjustable span-
ner until the fitting is in the desired position.
5. Put the protective cap back on.
6. Set the clutch switch back to AUTO.
300 876
BA-2022.07.19 EN
C 110
9
