Seametrics WP Series Instructions

General Information
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. Some of the more common applications involve:
• 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).
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
±1-1/2% of reading, +/- 1% of
Accuracy
full scale
Reed Switch 100 mA at 24V max.
Flow Range (GPM):
Size Min.
Flow
2" 2.5
3" 2.6
4" 4.0
6" 11.0
8" 18.0
Max Max.
Cont. Flow Flow
150 300
400 650
550 1100
1000 1850
1600 2850
WP Turbine Meter
Instructions
Installation
The following installation recommendations are
adapted from the American Water Works Manual M6,
and will result in the best meter life and accuracy.
Piping Conditions. It is recommended that the meter
be installed with at least ten diameters of straight pipe
upstream and five diameters downstream from elbows,
tees, crosses, valves, and other fittings. If less 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.
10x Dia.
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.
PUB -19120-0999
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