4 Operation
The valve is designed for cleaning in place (CIP).
Study the instructions carefully and pay special attention to the warnings!
NaOH = Caustic Soda.
HNO
3
= Nitric acid.
4.4
Recommended cleaning
Step 1
Always handle lye and acid with great care.
Caustic danger!
Always use
rubber gloves!
Always use
protective goggles!
Step 2
!
Never touch the valve or the pipelines when sterilising.
Burn hazard!
TD 461-636_2
Step 3
Clean the plug and the seats correctly.
Pay special attention to the warnings.
Lift and lower valve plug momentarily!
Shut-off valve
Change-over valve
Step 4
Examples of cleaning agents:
Use clean water, free from chlorides.
1. 1% by weight NaOH at 70
o
C
2. 0.5% by weight HNO
3
at 70
o
C
1 kg
NaOH
+
100 l
water
=
Cleaning agent.
0.7 l
53% HNO
3
+
100 l
water
=
Cleaning agent.
2.2 l
33% NaOH
+
100 l
water
=
Cleaning agent.
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