Yokogawa Pneumatic Retractables RF20H - Manual (Page 14)

IM 12B06K05-E-E
14
6.5 Removing the cleaning chamber
with process connection
System is under pressure.
Process liquid will leak when holder
is disconnected from process in an
inappropriate way.
• Tubing or tanks must be pressure-free,
empty, clean and without potentially
explosive atmosphere.
Interrupt the process.
Ensure that the system is pressure-free,
empty, clean and without potentially
explosive atmosphere.
How to remove the cleaning chamber:
1) Move holder to “service” position.
2) Switch off compressed air supply.
Emitted compressed air
can cause material damage or personal injury.
• Switch off compressed air supply before
removing the pneumatic tubes.
3) Remove pneumatic tubes (chap. 6.4).
4) Remove sensor (chap. 6.3).
5) Loosen process connection.
6) Remove process seals and holder.
7) Loosen lower housing cramp screws (Fig. 10).
8) Disconnect cleaning chamber with process
connection “A” from drive unit “D”.
9) Remove cleaning cartridge from insertion rod “C”.
Fig. 12: Removing the cleaning chamber and
process connection (refer to image!)
A) Cleaning chamber with process connection
B) Cleaning cartridge
C) Insertion rod
D) Drive unit
6.6 Replacing the wetted sealings
System is under pressure.
Process liquid will leak when holder
is disconnected from process in an
inappropriate way.
• Ensure that system is pressure-free before
replacing the sealings.
• Drain and clean tubing or tanks.
• Ensure that there is no potentially
explosive atmosphere
Emitted compressed air
can cause material damage or personal
injury.
• Switch off compressed air supply before
removing the pneumatic tubes.
Install the seals chosen according to the
holder and the process!
• Do only use original parts!
How to replace the seals:
1) Remove cleaning chamber with process
connection (chap. 6.5).
2) Remove and replace outer O rings “A”, "B" and
inner O ring "C" on insertion rod.
Fig. 13: O rings on insertion rod
O rings ø in [mm] A 18.72 x 2.62
B 10.77 x 2.62
B is left out
3) Remove and replace O rings “D” on cleaning
cartridge.
Fig. 14:O ring on cleaning cartridge
O ring ø in [mm] D 21.95 x 1.78
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!
A B C D
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!
CAUTION!
DANGER!
WARNING!
B A
D