4 Operation
The valve is designed for cleaning in place (CIP). CIP = Cleaning In Place.
Study the instructions carefully and pay special attention to the warnings!
NaOH = Caustic Soda.
HNO3 = Nitric acid.
4.3
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!
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
Open!
Step 4
Examples of cleaning agents:
Use clean water, free from clorides.
1. 1% by weight NaOH at 70
o
(158
o
F).
2. 0.5% by weight HNO
3
at 70
o
C
1 kg
(2.2 lb)
NaOH
+
100 l
(26.4 gal)
water
=
Cleaning agent.
0.7 l
(0.2 gal)
53% HNO
3
+
100 l
(26.4 gal)
water
=
Cleaning agent.
2.2 l
(0.6 gal)
33% NaOH
+
100 l
(26.4 gal)
water
=
Cleaning agent.
16
