1900 Series Water Meters

Model 1900 Series Water Meters ISTEC's 1900 Series Water Meters are ideally suited to measure the flow of irrigation, well water, and even extremely polluted water. The practical design allows metering of liquids with up to 30% suspended solids. The meter body is coated with epoxy paint and a self-cleaning turbine assures perfect operation in tough environments. The vacuum-sealed counter has large, easy to read numbers and is non-resettable.

The meters range in size from 2" to 10" and can be mounted horizontally, inclined, or vertical (up or down flow). Remote reading capability can easily be retrofitted onto the flow meter.

The factory-tested measuring insert is the same for all meter sizes with the following measuring accuracies:

Qmax-Qt: ±3% (Value Class A+B)
Qt-Qmin: ±5% (Value Class A)

Roller Counter on Model 1900 Series Water Meters The Roller Counter is fully encapsulated and protected from dirt and moisture. The meter comes with a lockable metal cap which protects the counter under dirty conditions. The 1900 Series Water Meter can be ordered with or without a Pulser but can also be retrofitted in the field. The meter can be mounted either horizontally or vertically.

Models
Dimensions
Installation Info

Model Number	1947	1950	1955	1980	1985	1970	1975

Pipe Size	2"	2-1/2"	3"	4"	5"	6"	8"
Minimum Flow Rate (GPM)	10.5	21	21	52	52	88	140
Continuous Flow rate (GPM)	132	220	400	550	770	1100	2000
Max. Flow Rate (GPM)	308	525	660	1300	1540	2200	4000
Max. Operating Temperature (°F)	125	125	125	125	125	125	125
Max. Operation Pressure (PSI)	230	230	230	230	230	230	230
Mounting Flanges (ANSI)	150	150	150	150	150	150	150
Mounting Position	Any	Any	Any	Any	Any	Any	Any
Model w/Pulse (gal/pulse)	1948 (10)	1952 (10)	1957 (10)	1962 (10)	1968 (100)	1972 (100)	1977 (100)
Weight (pounds)	24	29	34	42	53	66	106

Dimensions	1947 1948	1950 1952	1955 1957	1960 1962	1965 1968	1970 1972	1975 1977

Pipe Size	2"	2-1/2"	3"	4"	5"	6"	8"

h	2-5/16"	3-3/8"	3-3/4"	4-1/8"	4-3/4"	5-5/16"	7-1/8"
H	6-1/8"	6-1/8"	6-1/8"	6-1/8"	6-5/8"	6-5/8"	7-1/8"
L	7-7/8"	7-7/8"	8-7/8"	9-7/8"	9-7/8"	11-7/8"	13-3/4"

Before beginning the installation, verify that the system temperature, pressure and flow rate do not exceed the ratings indicated on the meter.
The meter is designed to operate at a sustained flow of approximately half the Maximum Flow Rating (indicated as the Continuous Flow Rating). The meter should not be operated at the Maximum Flow Rating for more than one hour per day as excessive wear and/or failure will result.
Flush the pipeline thoroughly after any plumbing changes to eliminate the possibility of foreign materials reaching the meter.
The 1900 Series meters may be installed in horizontal, inclined or vertical pipelines (either up or down flow). The meter (and pipe) must always be completely filled with liquid. To achieve the rated accuracy, the meter should be the same diameter as the pipe and there should be at least five (5) pipe diameters of straight pipe before and after the meter. In horizontal installations, the flow counter should be facing straight upward.
Pay careful attention to the flow direction as indicated by the arrow cast into the meter body.
It is recommended that a shutoff valve be located before and after the meter to facilitate service.
Care should be taken to protect the meter from water hammer as well as freezing temperatures.
The counter is calibrated in U.S. gallons and cannot be reset. It will roll around to zero after reaching its maximum reading. See page 2 for additional information on the counter.
Meters with a pulse output contain a magnetically driven “dry contact type” reed switch. Each contact closure is equal to one (1), ten (10) or 100 gallons of water as indicated on the meter. The electrical rating of the switch is 0.2 amps at 24 volt.

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