Seametrics WP Series User manual

PUB -19120-0999
Page 1 of 2
General Information
Specifications
Materials
Body & Cap Cast iron, epoxy coating
Turbine & Insert Engineered thermoplastic
Shafts Tungsten carbide
Bearings Sapphire
Pressure Up to 150 PSI working
pressure
Temperature 120°F
Accuracy ±1-1/2% of reading, +/- 1% of
full scale
Reed Switch 100 mA at 24V max.
Flow Range (GPM):
WP Turbine Meter
Instructions
WP Series turbine meters are dry-register mechanical
totalizers which use a coated ductile iron body for du-
rability. They provide a very high flow capacity with low
head loss. The versatility of these meters is greatly
enhanced by their sensor system, which uses built-in
magnets and external slots on the register.This allows
factory or field installation of low-cost reed switch sen-
sors for a wide variety of water treatment, telemetry,
and control applications. Typically, WP Turbine Meters
are used for applications where the need is for both a
high-accuracy non-powered flow meter (for account-
ing) and a field selectable output pulse for control pur-
poses.Someofthemorecommonapplicationsinvolve:
• driving externally-paced electronic metering
pumps or water treatment controls.
• Multiple switch positions
• optional factory installation of multi-pole mag-
nets (allows for a number of different pulse
rates).
Size Min. Max Max.
Flow Cont. Flow Flow
2" 2.5 150 300
3" 2.6 400 650
4" 4.0 550 1100
6" 11.0 1000 1850
8" 18.0 1600 2850
Installation
The following installation recommendations are
adapted from theAmerican Water Works Manual M6,
and will result in the best meter life and accuracy.
Piping Conditions. Itisrecommended that the meter
be installed with at least ten diameters of straight pipe
upstreamandfivediametersdownstreamfromelbows,
tees,crosses, valves, and other fittings. Ifless straight
pipe is available, or if debris are likely to go through
the meter, installation of a standard plate-type strainer
directly upstream is recommended. If a basket-type
strainer is used, it should be located at least five diam-
eters upstream.Avoid conditions of trapped air or par-
tially-filled pipe. This can occur when there is low flow
and open discharge near to the meter.
Flanges. Pipe flanges can be any standard 150 lb.
drilling, flat or raised face. Partial or full-face gaskets
may be used, but take care to insure that the gasket
does not protrude into the meter due to misalignment.
Adhering the gasket to the meter flange with gasket
adhesive is a good practice which will aid installation.
Position. WP Series are all-position meters, and can
be installed horizontally or vertically.
Connections. For the contacting head option, WP
meters use a meter-mounted reed switch to provide a
two-wire dry contact. See the Connections diagram
on page 2.
5x Dia.
10x Dia.

Turbine Insert Removal. The entire insert comes out
as a unit. After relieving all pressure inside the meter,
remove the four hex-head machine screws which hold
the insert flange in place. Lift the flange off, rocking it if
necessarytobreakthe seal. Remove the screws which
hold the insert to the flange. If necessary, the flange
may now be reinstalled to allow restoration of pressure
inthe pipe while the insert is being repairedorreplaced.
Reed Sensor Removal/Installation. To install or re-
moveareedsensor,first loosen the sensor cable strain
relief. Then remove the two screws which hold the reg-
ister cap in place and unsnap and lift off the cap. Fi-
nally, lift upwards on the reed sensor to slide it out of its
dovetail slot.
To determine where to install a reed sensor, find the
pulseratedesignator which corresponds to the desired
pulse rate. Start the sensor into the slot nearest the
arrow point of that designator. Start the sensor into the
slot, and push firmly until it bottoms. See photo at the
lower left.
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Maintenance and Repair
Recalibration. For meters used for revenue-billing
purposes, some states require periodic calibration
checking. This type of turbine meter is most commonly
checked every four years. Testing may be done by a
local mobile meter service or in a private or municipal
meter shop. Changes in calibration should be made at
an authorized meter shop.
Register Removal. If the register must be replaced for
any reason, follow these steps:
1) Remove the register cover by taking out the two
screws which hold it in place.
2) Remove the locking ring at the base of the register
by first removing its key segment, then rotating the ring
until it comes loose.
3) Lift the register free from the meter.
Red
Black
Type: Reed switch
Current Rating: 100 mA, 24 VAC maximum
2" 3" 4" 6" 8"
100 100 100 100 100
• • 1000 1000 1000
Gallons
per Pulse
Meter Size
WPR Meter Pulse Chart
0 0 0 0 0 0
X 1000 US. gal.
Pulse Rate
Designators
Sensor Slot
Sensor
Slot
Reed Sensor Installation
X100
1000
1
100
PBC3