I. introduction, Ii. specifi cations – Badger Meter CV Series User Manual

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Form #4-20-23 11/10

I. Introduction

Preso Venturi fl ow meters are diff erential pressure fl ow devices providing highly accurate and
repeatable measurements of liquids, gases, and steam. The Venturi restricts the fl ow at its throat and
measures the pressure diff erence of the unrestricted fl ow and restricted fl ow. The Venturi's throat
can be designed to meet the fl ow mearurement application optimizing the Venturi's accuracy and
permanent pressure loss.

The Preso Venturi's design provides longer lasting accuracy and lower permanent pressure loss
than orifi ce type meters, reducing maintenance and operating costs. The Preso Venturi can be built
to meet the highest pressure and temperature specifi cations often limited in other fl ow meter
technologies. All models can also be supplied with RTDs and transmitters to provide an economical
mass fl ow measurement solution.

II. Specifi cations

Applications:

Liquids, gases and steam

SSL - Classical (Herschel) Design / VISSL - Insert Version

Pipe Sizes:

½ to 60 inches and larger (13 to 1524 mm)

Pressure & Temperature:

Varies, dependent upon materials of construction

Pressure Loss:

6% of DP maximum

Turndown Ratio:

10:1

Process Connections:

SSL; NPT, fl anged, butt weld, socket weld, grooved
VISSL; Insert fi ts between pair of fl anges

Instrument Connections:

NPT, socket weld, fl anged

Accuracy:

±1% of reading uncalibrated; ±0.5% of reading calibrated

Standard Beta Ratios:

0.35, 0.49, 0.63 and 0.75;
exact sizing available to provide custom beta ratios

SSM - Hydraulic Shape Design (Nozzle Type) / VISSM - Insert Version

Pipe Sizes