WIKA mw series Instruction Manual page 9

Fig. 21 - Typical installation
LEGENDA
1 - Fitting
2 - Drain plug
3 - Service valve
4 - Piping
5 - Three piece fitting
6 - Root valve with drain
NOTE With gas or vapour process fluid, the instrument must be positioned higher than the pipe inlet (see Fig. 20). With a liquid process fluid, the
instrument can be positioned higher or lower, indifferently (see Fig. 19 e 20). In this case, during set point calibration the negative or positive head
must be taken into account (distance h in Fig.19 and 20).
Annex 1 – Model Code
MODEL CODE
1
1.1 Ignition protection mode
1.2 Sensor code
1.3 Sensor material
1.4 Process connect. material
1.5 Electric Contacts
1.6 Type of Electric Contact
Options
2
INSTRUCTION MANUAL
M
W
A
B
-
H
G
T
X
K
T
X
K
Example: Intrinsic Safety execution
Fig. 22 - Typical installation
7 - Process piping
8 - Three piece fitting
9 - "T" fitting
10 - Three piece fitting
11 - Curve
12 - Blocking joint
For further information
see datasheet
U
D
N
S
G
O
R
WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30
63911 Klingenberg • Germany
Tel. +49 9372 132-0
Fax +49 9372 132-406
info@wika.de
www.wika.de
NI-221WE
Rev. 5 12/16
Weather proof
Ex d
Low pressure diaphragm
Medium pressure diaphragm
Piston
Piston with diaphragm
Diaphragm PTFE
AISI s.s. or Inconel® 718
Monel® 400
PTFE
AISI s.s
Monel® 400
One
Two
Silver
Silver + Argon sealed
Gold
Gold + Argon sealed
Silver adjustable dead band