KROHNE LS 72xx EN - Manual (Page 5)

02/2013 LS 72xx 5
1.3 Mounting of 3A marked products
The 3A mark is valid only when the product is mounted in a 3A marked counterpart and installed acc.
to the installation manual. Use also a 3A marked O-ring or gasket if relevant.
The 3A marked products conforms to the 3A sanitary standards criteria. Materials and surfaces fulfil
the FDA demands and are certified by EHEDG.
EPDM O-rings supplied with 3A marked products are conform to sanitary standards class II (8% milk
fat).
1) Use only 3A approved counterparts
2) The inspection hole should be visible and drained. Face it downwards that leaking can be
observed.
3) Mount the device in a self-drained position.
4) Level the inner surface of the pipe with the counterpart.
5) Weld from the inside of the tank, if possible. Welds shall be free from cracks, crevices
and grooves. Weldings should be grinded to Ra= 0.8
Mounting of 3A products in pipe installations (A) or tank installations (B)