ABB SCK - Page 227

OI/SCK
-EN Rev. E Operating instruction SCK Gas Sampling System 227
The following conditions must be met:
 The system is switched off at the main switch.
 Central compressed-air supply shut off, gate valve in pneumatic box closed
(compressed-air pipes are vented).
 Rotary kiln is shut down.
 The system has cooled down.
Perform the following steps to shut down the system:
Step
Procedure
1
Secure the closed shutter on the duct flange with the enclosed
locking device.
2
Unscrew sample gas line screw connection on the analyzer
cabinet and gas sampling probe.
3
Flush sample gas line, filter unit and sample gas probe with dry,
dust-free and oil-free instrument air (flow rate approx. 100 l/h)
for about 15 minutes.
4
Clean any residue and incrustations off the filter unit and probe
pipe.
Note: Only clean mechanically. Do not use chemicals (particu-
larly acids and lyes) for cleaning.
Requirements
Instructions:
Shutting down