Vaisala offers certain PR‑43‑AP configurations
which have been certified to fulfill the sanitary requirements published by EHEDG (European
Hygienic Engineering & Design Group) organization. During this certification the hygienic
characteristics of both the refractometer and the process connection were evaluated against
the applicable requirements.
To ensure EHEDG compliant installation, follow
the mounting specifications provided on the mounting drawing supplied by Vaisala with each
PR‑43‑AP refractometer ordered with the ‑EH option.
Figure 1. EHEDG certified PR‑43‑AP. The following figure shows an example of such mounting guideline.
Table 1. EHEDG certified PR-43-AP
No.
Name
Material
Supplied by
Qty
1
Refractometer PR-43-AP
AISI316L
Vaisala
1
2
4 in sanitary clamp
AISI304
Vaisala
1
3
EHEDG certified sanitary gasket 4 in
ISO-2852
Vaisala
1
4
4 in sanitary ferrule
AISI316L
Vaisala
1
5
Customer pipe/vessel
AISI316L
Customer
1
For an installation that complies to EHEDG guideline 10, the distance a must be
shorter than the diameter b.
