Process Connections - KROHNE OPTIWAVE 3500 C Handbook

INSTALLATION
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3.7.2 Process connections

Requirements for hygienic connections: General notes
WARNING!
Installation conditions for EHEDG-approved devices
• To prevent contamination of the tank contents by microorganisms, make sure that the bottom
of the antenna is flush with the inner surface of the tank.
• Installation of the antenna must agree with the requirements given in EHEDG Guidelines 8
(Hygienic design principles), Guidelines 10 (Hygienic design of closed equipment for the
processing of liquid food) and the EHEDG Position Paper. For more data, go to this website:
https://www.ehedg.org/, click on Guidelines & Working Groups > Guidelines and then select
the appropriate document.
• If the antenna is installed in a T-piece connector, the ratio between the length of the vertical
branch tube (L), the diameter of the vertical branch tube (D) and the diameter of the antenna
(d) must be L/(D-d) < 1.
• Make sure that there are no "dead legs" or spaces around the antenna where there is a risk
of contamination or corrosion.
• Make sure that the device can drain easily and automatically.
• The device and antenna options must be appropriate for cleaning-in-place systems. Do not
dissassemble the device for cleaning.
• Make sure that the cleaning device is correctly installed. Can the cleaning device detect
deposits on the antenna and easily remove them?
• Process seals must agree with EHEDG guidelines. For more data, go to this website:
https://www.ehedg.org/, click on Guidelines & Working Groups > Guidelines and then select
"EHEDG Position Paper".
• Make sure that you do not damage parts made of PEEK, polished parts and the O-ring. Use
standard CIP-SIP process conditions. Make sure that the antenna, gaskets and other process
seals are resistant to the tank contents and the product used for the cleaning process.
WARNING!
Installation conditions for 3-A®-approved devices
• To prevent contamination of the tank contents by microorganisms, make sure that the bottom
of the antenna is flush with the inner surface of the tank.
• Make sure that the position of the device permits liquid to drain from the antenna.
• The antenna must be accessible for cleaning.
• Process connections must agree with 3-A® Sanitary Standards. Refer to 3-A® Sanitary
Standard for Sensors and Sensor Fittings and Connections, Number 74-06.
• Process seals must agree with 3-A® Sanitary Standards. Refer to 3-A® Sanitary Standard
for Multiple-Use Rubber and Rubber-Like Materials Used as Product Contact Surfaces in
Dairy Equipment, Number 18-03. Refer also to 3-A Sanitary Standards for Sanitary fittings,
Number 63-03 and 3-A CCE Coordination Bulletin, Number 2011-3 (DIN Standard Fittings
Compliance).
• Make sure that you do not damage parts made of PEEK, polished parts and the O-ring. Use
standard CIP-SIP process conditions. Make sure that the antenna, gaskets and other process
seals are resistant to the tank contents and the product used for the cleaning process.
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OPTIWAVE 3500 C
02/2023 - 4005813604 - MA OPTIWAVE 3500 R04 en