Burkert Type 2702 - Manual (Page 28)

28 - 2702
M
aintenance and
S
ervicing of the valve
english
Dismount the piston actuator as described below. You will avoid damage to the gaskets because the piston
will be brought into the upper position.
Connect compressed air at 4.5 to 6 bar to P (1).
Remove the blowout mouthpiece.
Unscrew the 4 screws.
Open the cover (2).
The 2 red switches for emergency manual actuation (3)
are located next to the terminal strip.
They are in the idle position when the arrow is parallel to
the terminal strip.
Turn the 2 switches carefully 90 degrees in the
clockwise direction (in either order) (4a).
The piston moves into the upper position and the plug is
separated from the valve seat.
Turn only the upper switch to the idle position (4b).
The piston stays in the upper position even after the
compressed air is switched off.
Replacement.oF.the.plug.with.sideControl.type.1067
caution!
use.of.the.incorrect.lubricant.causes.contamination!
For special applications such as for oxygen and analysis, use only the approved lubricants.
demounting.the.actuator