Siemens SITRANS P - Manual (Page 223)

SITRANS P measuring instruments for pressure
Fitttings - Shut-off valves for differential pressure transmitters
Low-pressure multiway cock
2/223 Siemens FI 01 · 2009
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■
Overview
The low-pressure multiway cock 7MF9004-4CA/-4DA can be
flanged to pressure transmitters for differential pressure.
■
Benefits
• Robust design
• For liquids and gases
• One-hand operation
■
Design
The multiway cock has 2 process connections and 2 test con-
nections, which are available in 2 versions (with sealing screws
G
3 /
8
or quick-release couplings). The housing is made of hot-
pressed brass CuZn39Pb3, CW 614N. Test connections with
sealing screws or with self-sealing quick-release couplings.
Note: An accessory set is always required for flanging of the
multiway cock to a differential pressure transmitter.
■
Function
• Shutting off the differential pressure lines
• Testing the pressure transmitter zero
• Testing the pressure transmitter characteristic
Cock positions; the symbols are printed on the cock
■
Accessories
Accessory set for low-pressure multiway cock
• L11: 4 screws M10x25 to DIN EN 24017, 4 washers, 2 flat gas-
kets
• L15 (suitable for oxygen): 4 screws M10x25 to DIN EN 24017,
4 washers, 2 flat gaskets
• L31: 4 screws 7 /
16
-20 UNF x 1 inch, 2 flat gaskets
Washers Ø 10.5 to DIN 125
Flat gaskets made of PTFE, max. permissible temperature 80 °C
Multiway cock in oil-free and grease-free design
• S11: BAM-tested lubricant, gasket suitable for oxygen
Mounting brackets
• M13: Required for wall mounting or for securing on rack
(72 mm grid); made of electrogalvanized sheet-steel
Selection and Ordering data Order No.
Low-pressure multiway cock
for liquids and gases, for flanging to pressure
transmitters, max. working pressure 25 bar,
max. working temperature 60 °C
(up to 80 °C for a short time), weight 1.75 kg
(without accessory set)
Test connections
2x sealing screws G 3 /
8
7MF9004-4CA
2x quick-release couplings 7MF9004-4DA
Selection and Ordering data Order code Order No.
Further designs 1)
1) When ordering accessory set or mounting together with the multiway cock,
please use Order code; otherwise use Order No.
Please add "-Z" to Order No. and
specify Order code.
Accessory set to EN
(required for flanging, weight 0.2 kg)
4x screws 7 /
16
-20 UNF x 1 inch
to ASME B18.2.1; chromized steel
2x gaskets made of PTFE, max.
permissible temperature 80 °C
L31 7MF9004-5CC
Accessory set to DIN
(required for flanging, weight 0.2 kg)
4x screws M10x25 to DIN EN 24017;
chromized steel
4x washers Ø 10.5 mm to DIN 125;
2x gaskets made of PTFE, max.
permissible temperature 80 °C
• Standard design L11 7MF9004-6AD
• Version for oxygen L15 7MF9004-6AE
Multiway cock in oil-free and
grease-free design
BAM-tested lubricant, gasket
suitable for oxygen
S11
Mounting bracket
required for wall mounting or for
securing on rack (72 mm grid),
made of electrogalvanized sheet-
steel, weight 0.85 kg
M13 7MF9004-6AA
© Siemens AG 2008