June 2021
Installation, Operation and Maintenance Manual
MAN 689 Rev. 6
Operation and Use
3.3
Calibration of Operating Time in
Supply Operation
The calibration of the operation time is made by Biffi Italia s.r.l. according to customer
requirements and to technical data sheet included in technical documentation.
If necessary, it’s possible to modify or to reset the operating time through the flow
regulation valve placed between the control system and the pneumatic cylinder
(Figure 18).
Figure 18
Adjustment of operating time
To carry out the adjustment, use an adequate Allen wrench and follow these steps
(Figure 18):
•
Loosen the locknut.
•
Screw with a screwdriver the setting screw to increase the operation time.
•
Unscrew with a screwdriver the setting screw to decrease the operation time.
•
After the adjustment is over, screw the locknut.
The procedure is absolutely general. It is applicable both fail-to-open and
fail-to-close actuators.
(Close) screw for decrease speed
Item 278:
see operating diagram
Pneumatic
connection
Pneumatic
connection
(open) unscrew for increase speed of operation
Screwdriver
Wr
en
ch
22
Section 3: Operation and Use
