Burkert Type 2700 - Manual (Page 12)

10 - 2700
M
AINTENANCE AND
S
ERVICING
english
Disassembly:
Remove the electrical and pneumatic supplies from the Top Control.
Pull off the pneumatic hose between Top Control and drive unit at control
connection of drive unit.
Control function A:
Pressurize the lower control port of the actuator with compressed air (6 bar), so
that the control cone is lifted from the valve seat and is not damaged.
Control function B:
With control function B, no compressed air must be applied for this purpose.
Remove the actuator in the open valve position by unscrewing the nipple from the
housing.
Faults
Replacement of the control cone
On the fluidic side is it possible to exchange the control cone if it becomes worn or damaged. For this purpose the drive unit
must be disassembled from the housing.
Replacing the control cone
Knock out the dowel pin with a suitable driver.
Driver diameter:
up to DN 25 Ø 4 mm
from DN 32 Ø 5 mm
Pull off the control cone with aid of two metal strips of equal height that are clamped to
the left and right of the spindle between the control cone and the threaded nipple of the
drive unit. To pull off the control cone, apply compressed air (approx. 6 bar) to the lower
control connection of the drive.
Push the new control cone over the end of the spindle.
Align the bores.
Dowel pin
Control cone
threaded nipple
Top Control
actuator
housing
lower
control port
ATTENTION!
Repairs to the actuator may only be carried out in the factory. Contact your Bürkert branch or our
Customer Service directly:
Bürkert Fluid Control Systems
Service Department
Chr.-Bürkert-Str. 13-17
D-76453 Ingelfingen
Tel.: (07940) 10-111
Fax: (07940) 10-448
E-Mail: [email protected]
ATTENTION!
Do not damage the sealing surface or the control contour!