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Siemens SITRANS P Manual de usuario Pagina 214

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SITRANS P measuring instruments for pressure
Fitttings - Shut-off valves for differential pressure transmitters
Valve manifold combination DN 8
2/214
Siemens FI 01 · 2009
2
■
Overview
The valve manifold combination DN 8 (7MF9416-4..) is for pres-
sure transmitters for differential pressure.
It is used to shut off and blow out the differential pressure lines
and to check the pressure transmitter zero.
In the designs with a test connection, a test device can be con-
nected to check the pressure transmitter characteristic.
■
Benefits
• Max. working pressure 420 bar
■
Application
The valve manifold combination DN 8 is designed for vapors.
■
Design
The valve manifold combination DN 8 has a process connection
with welding pins.
The connection for the pressure transmitter is designed as as
flange connection, while the blow-out connection is designed as
a pipe union with ferrule.
The manifold valves have an internal spindle thread, while the
blow-out valves have an external spindle thread.
The optional test connection is M20x1.5.
The valve manifold combination DN 8 is supplied with a mount-
ing plate.
Materials used
■
Function
• Shutting off the differential pressure lines
• Blowing out the differential pressure lines
• Checking the pressure transmitter zero
As an option it is possible to order a version with a test connec-
tion, to which a test device for checking the pressure transmitter
characteristic can be connected.
Valve manifold Blow-out valves
Component Material Mat. No. Material Mat. No.
Housing P250GH 1.0460 16 Mo 3 1.5415
Head parts C 35 1.0501 21 CrMo V57 1.7709
Spindles X 12
CrMoS 17
1.4104 X 20 Cr 13 1.4021
Cones X 35
CrMo 17
1.4122 X 35
CrMo 17
hardened
and tem-
pered
1.4122
Valve seats X 6 CrNiMoTi 1.4571/316Ti X 20 Cr 13 1.4021
Packings PTFE - Pure
graphite
-
Welding pins - - 16 Mo 3 1.5415
© Siemens AG 2008
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