WIKA 981 serie Betriebsanleitung Seite 11

3. Safety
Material marking for diaphragm seals
The abbreviations with which the diaphragm seals are marked are given in the table below.
Abbreviation Long text (EN)
LIN lining
COAT coating
SF sealing face
MB membrane
CL cell
UB upper body
LB lower body
FM filler material
EX extension
PS plug screw
PC process connection
(in-line diaphragm seal)
Example: Diaphragm seal with flange connection, model 990.27
Marking 1
WIKA operating instructions, diaphragm seal measuring systems
Marking 1
Line
1
2
3
4
Marking 2
Line
1
2
Marking 2
Designation
Lining
Coating
Sealing face
Diaphragm of diaphragm seal
Measuring cell of diaphragm seal
Upper body of diaphragm seal
Lower body of diaphragm seal
Welding filler
Tube of extended diaphragm
Plug screw
Process connection (in-line diaphragm
seal)
Designation
Process connection standard
Process connection / Nominal
pressure rating
Material of diaphragm seal's up-
per body
Material of the diaphragm seal's
diaphragm
Designation
Manufacturer and serial number
Model
EN
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