Nivetec Signet P525-1, Signet P525-1S, Signet P525-2, Signet P525-2S Operating Instructions Manual
Signet 525 Metalex Flow Sensor
retainer retainer
rotor pin
bearing
bearing
rotor
*P52590-1*
P52590-1 Rev. S 8/15
Dimensions
P525-1, P525-1S
Operating Instructions
P525-1, P525-1S P525-2, P525-2S
**
P525-2, P525-2S
P52509 & P52509-2 Rotor Kits
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SIGNET
38.4 mm
(1.5 in.)
27 mm
(1.06 in.)
* 7.6 m (25 ft) cable included
SIGNET
63.5 mm
(2.5 in.)
27 mm
(1.06 in.)
Specifi cations
General
Operation Range ............... 0.5 m/s to 6 m/s (1.6 ft/s to 20 ft/s) (depending on pipe size)
Pipe Size Range ................DN15 to DN300 (½ in. to 12 in.)
Linearity ............................. ±1% of max. range @ 25 °C (77 °F)
Repeatability ...................... ±0.5% of max. range @ 25 °C (77 °F)
Wetted Materials
Sensor Body ...................... 316 SS (ACI type CF-8M per ASTM A351), DIN 17440
Rotor Material ....................17-4PH-1 Stainless Steel
Rotor Pin............................ Tungsten Carbide GRP 1 or 316 SS
Retainers (2) ......................316 stainless steel (1.4401)
Rotor Bearings (2) .............Carbon fi ber reinforced PTFE
Gasket ............................... KLINGER® sil C-4401 (supplied with fi tting)
Electrical
Frequency..........................39 Hz per m/s (12 Hz per ft/s) nominal
Amplitude...........................5 to 8 mV p-p per Hz
Source Impedance ............11.6 KΩ
Coil Inductance ..................3.5 Henrys @ 25 °C
Cable Length ..................... 7.6 m (25 ft), can be extended up to 61 m (200 ft)
Cable Type ........................22 AWG, 2-conductor w/shield
Maximum Temperature/Pressure Rating
Socket Weld or Weld-On
Mini-Tap fi ttings................ 103 bar @ 149 °C (1500 psi @ 300 °F)
Operating Temperature ...... -18 °C to 149 °C (0 °F to 300 °F)
Standards and Approvals
• Manufactured under ISO 9001 for Quality,
ISO 14001 for Environmental Management and
OHSAS 18001 for Occupational Health and Safety.
• RoHS compliant
China RoHS (Go to www.gfsignet.com for details)
Warranty Information
Maintenance
Refer to your local Georg Fischer Sales offi ce for the most
current warranty statement.
All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales offi ce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.
Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buffers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature,
mishandling (e.g. broken glass,
chemical poisoning, dry-out) or
damaged membrane, freezing
and/or extreme temperatures).
Product Registration
Thank you for purchasing the Signet line of Georg Fischer
measurement products.
If you would like to register your product(s), you can now
register online in one of the following ways:
• Visit our website www.gfsignet.com.
Under Service and Support click on
Product Registration Form
• If this is a pdf manual (digital copy),
click here
The 525 sensor requires little or no maintenance of any kind,
with the exception of an occasional sensor/paddlewheel cleaning.
Paddlewheel Maintenance:
Paddlewheel fl ow sensors are subject to wear and may require
maintenance and replacement of mechanical parts (rotors,
pin, bearings, retainers, etc.). The frequency of recommended
maintenance will vary based upon application specifi cations,
characteristics of the measured fl uid, and installation details.
These can include, but are not limited to: process fl owrate,
occurrence of water hammer, fl uid corrosiveness and
abrasiveness, sensor installation relevant to other equipment.
GF Signet offers individual replacement parts and rotor
replacement kits, which include replacement instructions,
allowing customers to perform fi eld maintenance and reduce
application down-time. Please refer to the Paddlewheel
Replacement section (page 4) or contact your local GF Sales
Representative with any questions.
Sensor Removal Procedure
1. Depressurize and drain pipe.
2. Remove the four sensor fl ange bolts and lock washers.
Pull upward on the sensor fl ange with an alternating
twisting motion.
Safety Information
1. Do not remove from pressurized lines.
2. Do not exceed maximum temperature and 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
and service.
6. Do not alter product construction.
7. Failure to follow safety instructions could result in severe
personal injury!
Caution / Warning / Danger
Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death
Personal Protective Equipment (PPE)
Always utilize the most appropriate PPE during
installation and service of Signet products.
Pressurized System Warning
Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.
Note / Technical Notes
Highlights additional information or detailed procedure.
WARNING!
Do not remove from pressurized lines.
Wear safety goggles and faceshield
during installation/service.
Location of Fitting
Recommended sensor
upstream and downstream
mounting requirements.
Reducer
15x I.D. 5x I.D.
2 x 90° Elbow
3 dimensions
40x I.D. 5x I.D.
2 x 90° Elbow
90° Elbow
Pump/Valve
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.
25x I.D. 5x I.D.
20x I.D. 5x I.D.
50x I.D. 5x I.D.
45°
45°
2
Signet 525 Metalex Flow Sensor
• Vertical pipe runs: Sensor must be
mounted in lines with UPWARD
fl ow only.
Sensor-Fitting Selection
(
)
14
23
Flange
bolt torque
pattern
Tee & Mini-Tap Fitting Installation
The 525 is designed for installation into SCH 40 stainless steel
pipes via the Signet Metalex Tee, Mini-Tap.
Wetted fitting
materials:
+GF+
525-1 Sensor
525-1S for stainless steel pin
316 SS
Tee Fitting,
hardware included
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
Wetted fitting
materials:
+GF+
525-2 Sensor
(525-2S for stainless steel pin)
316 SS
347 SS
Mini-Tap Fitting,
hardware included
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
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 in. to 1 in.
• 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 in. to 12 in.
• 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.
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.
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.
Fitting
flange
Flow sensor
arrow
Flow
Sensor Wiring
Required Hardware
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
NOTE: Mini-Tap fi ttings are welded onto the pipe and are used
with Signet 525-1 and 525-2 sensors.
CAUTION
Welds MUST be made by a certifi ed welder who
is licensed to weld stainless steel and other high
carbon grade steels.
• Use 2-conductor shielded cable for
cable splices to 61 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.
Frequency
Signet 525 Metalex Flow Sensor
Black
Red
Shield
9900 Terminal
V+
GND
DATA
No Connection
SHLD
3
Rotor Replacement Procedure
Rotor Pin
1. With a small pair of needlenose pliers, fi rmly grip the
center of the rotor pin (axle)
and with a twisting motion,
bend the rotor pin into an
"S" shape. This should pull
the ends of the pin out of
the retainers and free the
rotor assembly.
2. Remove rotor pin retainer from each
side by gently tapping it inwards
using a punch. Install a new retainer
into the sensor body with its rotor pin
clearance hole inward. Only install
one retainer at this time.
K-Factors
The K-Factor is the number of pulses the
sensor will generate for each engineering
unit of fl uid which passes.
They are listed in U.S. gallons and in liters.
For example, in a 1 inch SCH 40S stainless
steel pipe, the sensor generates 266.17
pulses per gallon of fl uid passing the rotor.
K-Factors are listed for SCH 40S stainless
steel pipes up to 12 inch.
Conversion Formulas
1 U.S. gallon = 0.003785 cubic meters
0.000003069 Acre feet
8.3454 pounds of water
Ordering Information
Rotor Pin
Retainer
3. Insert the new rotor
assembly and bearings
into the rotor housing of
the sensor and place the
Existing
Retainer
new rotor pin (axle) through
the open end of the rotor
housing, through the rotor
and bearings, and into the
previously installed retainer.
4. Using a vise or C-clamp, press the
second retainer into the hole in the
Punch
sensor body while lining up the rotor
pin with the center of the retainer hole.
NOTE: A hammer and center punch
can also be used if a clamp or
vice is not available
SCH 40S Stainless Steel Pipe per ANSI B36.19
Pipe Size
(inch)
½ 873.03 230.66 0.0687 0.2601
¾ 515.41 136.17 0.1164 0.4406
1 266.17 70.322 0.2254 0.8532
1 ¼ 148.84 39.324 0.4031 1.5258
1 ½ 107.98 28.528 0.5557 2.1032
2 64.808 17.122 0.9258 3.5042
2 ½ 44.685 11.806 1.3427 5.0822
3 28.579 7.5506 2.0994 7.9464
4 16.302 4.3070 3.6805 13.931
5 10.237 2.7046 5.8611 22.184
6 7.0057 1.8509 8.5645 32.416
8 3.9641 1.0473 15.136 57.289
10 2.4690 0.6523 24.301 91.981
12 1.6894 0.4463 35.516 134.43
K-Factor Pulses/
U.S. GAL
K-Factor Pulses/
U.S. Liter
A-Factor
GPM / Hz
A-Factor
LPM / Hz
New
Bearings
Rotor
Assembly
Part No. Code Description
P525-1 198 801 494 Metalex Flow sensor with tungsten carbide pin; ½ in. to 1 in. socket-weld tee fi ttings
P525-2 198 801 495 Metalex Flow sensor with tungsten carbide pin; 1¼ in. to 12 in. weld-on mini-tap fi ttings
P525-1S 159 000 963 Metalex Flow sensor with stainless steel pin; ½ in. to 1 in. socket-weld tee fi ttings
P525-2S 159 000 964 Metalex Flow sensor with stainless steel pin; 1¼ in. to 12 in. weld-on mini-tap fi ttings
Accessories and Replacement Parts
P52509 198 801 501 Rotor kit: rotors, 316 stainless steel pin, carbon fi ber reinforced PTFE bearings, SS retainers
P52509-2 159 000 480 Rotor kit: rotors, tungsten carbide pin, carbon fi ber reinforced PTFE bearings, SS retainers
P52504-1 198 801 500 Rotor Pin, Stainless steel (1.4401) (optional)
P52504-2 198 820 023 Rotor Pin, Tungsten Carbide (standard)
P52618 159 000 493 Gasket
P52503 198 820 013 Bearing, carbon fi ber reinforced PTFE
P52527 159 000 481 Retainers, Stainless steel
P52628 159 000 504 Fitting cap kit (cap and gasket)
P51589 159 000 476 Conduit adapter kit
5523-3222 159 000 393 Cable (per foot) 2 cond. with shield, 22 AWG
P52590-1 Rev. S 8/15 English
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