Siemens SITRANS P - Manual (Page 209)

SITRANS P measuring instruments for pressure
Fitttings - Shut-off valves for differential pressure transmitters
3-way valve manifold DN 8
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Overview
The 3-way valve manifold DN 8 (7MF9416-1../-2..) is for pressure
transmitters for differential pressure. It is used to shut off and
blow out differential pressure lines and to test the pressure trans-
mitter zero.
In the designs with a test connection, a test device can be con-
nected to test the pressure transmitter characteristic.
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Benefits
• For aggressive and non-aggressive liquids and gases
• The maximum working pressure is 420 bar.
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Application
The 3-way valve manifold is available in versions for aggressive
and non-aggressive liquids and gases.
Mounting plates are available for wall mounting, for securing to
mounting racks or for pipe mounting.
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Design
For the process connection on the version for non-aggressive
media it is possible to choose between a pipe union with ferrule
and welding pins.
The version for aggressive media always has a pipe union with
ferrule.
Both versions are available optionally with a test connection
M20x1.5.
The valves have an internal spindle thread.
Materials used
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Function
The 3-way valve manifold DN 8 performs two functions as stan-
dard:
• Shutting off the differential pressure lines
• Checking the pressure transmitter zero
All versions are also available with a test connection, to which a
test device for checking the pressure transmitter characteristic
can be connected.
For non-aggressive liquids and
gases For aggressive
liquids and
gases
Component Material Mat. No. Material Mat.
No.
Housing P250GH 1.0460 X 6
CrNiMoTi
17 12 2 1.4571/
316Ti
Head parts C 35 1.0501
Spindles X 12 CrMoS 17 1.4104
Cones X 35 CrMo 17 hard-
ened and tempered 1.4122
Valve seats X 6 CrNiMoTi 17 12 2 1.4571/316Ti
Packings PTFE - PTFE -
Selection and Ordering data Order No.
3-way valve manifold DN 8 7 M F 9 4 1 6 - 7 7 A
for flanging to pressure transmitters for differ-
ential pressure, max. working pressure
420 bar, (order accessory set and mounting
plate with Order code), without certificate
for non-aggressive liquids and gases
procedss connection: Pipe union with ferrule
• without test connection 1 B
• with test connection 1 C
for non-aggressive liquids and gases
procedss connection: Welding pin Ø 14 x 2.5
• without test connection 2 C
• with test connection 2 D
for aggressive liquids and gases
process connection: Pipe union with ferrule
• without test connection 1 D
• with test connection 1 E
Accessories
Factory test certificate EN 10204–2.2 7MF9000-8AB
Material acceptance test certificate
EN 10204-3.1 7MF9000-8AD
© Siemens AG 2008