GF Signet 525 User Manual
Signet 525 Metalex Flow Sensor
*P52590-1*
P52590-1 Rev. P 10/12 English
English
SAFETY INSTRUCTIONS
1. Do not remove from pressurized lines.
2. Do not exceed maximum temperature/pressure specifi cations.
3. Pipe fi tting must be installed by certifi ed welder only.
4. Do not install/service without following installation instructions
(see sensor manual).
5. Wear safety goggles and face shield during installation/service.
6. Do not alter product construction.
7. Failure to follow safety instructions could result in severe
personal injury!
1. Location of Fitting
Recommended sensor upstream/downstream
mounting requirements.
2 x 90° Elbow
25x I.D. 5x I.D.
2. Sensor Mounting Position
• Horizontal pipe runs: Mount sensor in the upright (0°) position for
best overall performance. Mount at a maximum of 45° when air
bubbles are present. Do not mount on the bottom of pipe when
sediments are present.
Maximum Operating Temperature/Pressure:
Signet 525 Metalex Sensor with:
• Signet 526-1XXX Series Saddle Fitting:
21 bar @ 66 °C (300 psi @ 150 °F)
• Signet 526-2XXX Series Tee and Mini-Tap Fitting:
103 bar @ 149 °C (1500 psi @ 300 °F)
Reducer
15x I.D. 5x I.D.
2 x 90° Elbow
3 dimensions
40x I.D. 5x I.D.
45°
90° Elbow
20x I.D. 5x I.D.
Pump/Valve
50x I.D. 5x I.D.
45°
• Vertical pipe runs: Sensor must be mounted in lines with UPWARD
fl ow only.
3. Sensor/Fitting Selection
The 525 is designed for installation into SCH 40 stainless steel pipes
via the Signet Metalex Tee, Mini-Tap or Saddle fi ttings, see options
below:
Signet Metalex Tee Fittings (Sensor PN P525-1/-1S)
Pipe (in.) Fitting Code
0.50 P526-2005 198 840 501
0.75 P526-2007 198 840 502
1.00 P526-2010 198 840 503
Signet Metalex Mini-Tap Fittings (Sensor PN P525-2/-2S)
Pipe (in.) Fitting Code
1.25 P526-2012 159 000 494
1.50 P526-2015 198 840 506
2.00 P526-2020 159 000 495
2.50 P526-2025 159 000 496
3.00 P526-2030 159 000 497
4.00 P526-2040 159 000 498
5.00 P526-2050 159 000 499
6.00 P526-2060 159 000 500
8.00 P526-2080 159 000 501
10.0 P526-2100 159 000 502
12.0 P526-2120 159 000 503
Wetted fitting materials:
316 SS
+GF+
525-1
Sensor
(525-1S for stainless steel)
+GF+
525-2
Sensor
(525-2S for stainless steel pin)
Tee Fitting,
hardware included
Wetted fitting materials:
316 SS & 347 SS
Mini-Tap Fitting,
hardware included
Signet Metalex Saddle Fittings (Sensor PN P525-3/-3S)
Blk
F-
Red
F+
Shld.
525
black
(AC signal out)
red
(AC signal out)
silver
(ground) Instruments
1/2 in. NPT
conduit port
14
23
Flange
bolt torque
pattern
Pipe (in.) Fitting Code
2.00 P526-1020 159 000 484
2.50 P526-1025 159 000 485
3.00 P526-1030 159 000 486
4.00 P526-1040 159 000 487
5.00 P526-1050 159 000 488
6.00 P526-1060 159 000 489
8.00 P526-1080 159 000 490
10.0 P526-1100 159 000 491
12.0 P526-1120 159 000 492
4. Fitting Installation, Required Hardware
Wetted fitting materials:
Ductile Iron, 347 SS,
Carbon Steel,
+GF+
525-3
Sensor
(525-3S for stainless steel pin)
Buna-N/Neoprene
Saddle Fitting,
hardware included
Signet Metalex Tee & Mini-Tap Fittings, P526-2XXX
• 0.5 to 1 inch pipes, P526-2 series fi tting required
• 1.25 to 12 inch pipes: P526-2 series fi tting and 27 mm
(1-1/16 in.) diameter drill required
• Mini-Tap fi ttings are welded onto the pipe and are used with
Signet 525-1 and 525-2 sensors.
Signet Metalex Saddle Fitting, P526-1XXX
• 27 mm (1-1/16 in.) diameter drill required
Saddle type fi ttings are strapped to the pipe and are used with
Signet 525-3 sensors. Welds MUST be made by a certifi ed welder
who is licensed to weld stainless steel and other high carbon
grade steels.
4.1 Installation, Tee & Mini-Tap Fittings
1. Select an appropriate mounting location as outlined in
sections 1 and 2.
2. Depressurize and drain pipe.
3. Use the following welding and installation procedures
appropriate for your fi tting/pipe size:
Signet Tee Fittings, 0.5 to 1 inch:
• Insert pipe into fi tting socket
• Make sure the pipe is parallel to the bottom of the Mini-Tap
fi tting.
• Weld pipe into place.
Signet Mini-Tap Fittings, 1.25 to 12 inch:
• Drill a 27 mm (1-1/16 in.) diameter hole completely through the
ONE surface of the pipe. Thoroughly deburr inner and outer
edges of hole.
• Tack weld the Mini-Tap fi tting onto the pipe, making sure the
hole in the pipe is lined up with the Mini-Tap fi tting hole.
• Weld the Mini-Tap fi tting onto the pipe.
4.2 Installation, Saddle Fittings
1. Select an appropriate mounting location as outlined in
sections 1 and 2.
2. Drill a 27 mm (1-1/16 in.) diameter hole completely through
the TOP surface of the pipe. Thoroughly deburr inner and
outer edges of hole.
3. Place the Buna-N/Neoprene saddle O-ring over the pipe hole
(small hole side towards pipe). Position the saddle fi tting
over the O-ring, making sure the O-ring
centers on the underside fi tting ridge.
Center saddle fi tting and O-ring over the
pipe hole, then strap the fi tting to the pipe
with the two U-bolts. Snug all four nuts
in a criss-cross pattern. Using a torque
wrench (when possible), torque the
U-bolts in a criss-cross pattern to 52 foot pounds.
14
U-bolt
torque
pattern
23
5. Sensor Installation
1. Set the gasket supplied with the fi tting onto the fi tting fl ange,
making sure the holes align.
2. Remove the red rotor protection cap and insert the sensor
into the fi tting, making sure not to bump the rotor assembly.
Make sure the arrow on the side of the sensor is pointing in
the direction of fl ow.
Fitting
flange
Flow sensor
arrow
6. Sensor Wiring
Flow
3. Slip two washers onto each bolt and insert the bolt/washer
onto each of the four fi tting fl ange holes.
4. Snug all four fl ange bolts in a criss-cross pattern. Using a
torque wrench (when possible), torque the fl ange nuts in a
crisscross pattern to 52 foot pounds.
• Use 2-conductor shielded cable for cable splices to 60 m
(200 ft).
• Maintain cable shield through splice.
• Shield the unjacketed silver (ground) wire using electrical tape
to prevent potential noise interference and/or shorting hazards.
2 Signet 525 Metalex Flow Sensor
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