Badger Meter AF - Flanged User Manual
Ellipse® Pitot Tube Meter
AF Annular Flanged Meter
PTT-UM-00525-EN-02 (April 2014)
User Manual
Ellipse® Pitot Tube Meter, AF Annular Flanged Meter
CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pipe Orientation and Sensor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation Instructions, Single Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Instructions, Double Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installation Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Location Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Flow Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Page ii April 2014
INTRODUCTION
The Preso patented elliptical design outperforms and provides greater
accuracy than traditional differential pressure flow measurement devices. This
differential pressure flow meter is designed with a series of ports facing the
upstream velocity pressures, as well as flow sensing ports strategically located
ahead of the trailing edge flow separation.
The multi-ported, self-averaging flow element consists of an elliptical shape
with two independent flow sensing chambers. The impact velocity sensing
holes (high pressure) are located along the leading edge and the true static
sensing holes (low pressure) are on the exterior probe side. Model AF comes
with instrument shutoff valves with provisions to accept a transmitter or direct
indicating meter.
User Manual
True static
sensing holes
Impact velocity
sensing holes
SPECIFICATIONS
Applications Air, liquids and gases
Pipe Sizes 2…72 inches (50…1820 mm)
Pressure Vary per flange ratings
Temperature Vary per flange ratings
Accuracy ±0.75% of reading
Turndown Ratio 17:1 with no vacuum effect
Standard Components T-type head, 316 SS 1/4" or 1/2" FNPT connection
CS 3000 lb weld fitting, ASTM A105
316/316L SS Ellipse sensor
Instrument valves (2 per sensor), 1/2", CS
316 SS ID tag with wire
150 lb 316/316L SS sensor flange
CS gasket with SS spiral wound ring
CS mounting flange, 150 lb ASTM A-105 with nuts and bolts
Reynolds Number Greater than 75,000 maintains most accurate flow measurements
Less than 75,000 consult factory for estimated results
Resonance If greater than 0.8, use double support per ASME PTC 19.3
Table 1: Specifications
Page 3 April 2014
Ellipse® Pitot Tube Meter, AF Annular Flanged Meter
PIPE ORIENTATION AND SENSOR MOUNTING
Flow
80°
Field Weld
80°
Flow
Air and Gas
Flow
H
Field Weld
L
80°
Figure 1: Horizontal pipe installation
80°
Field Weld
H
Liquid
Ellipse
L
OTE:N Illustration represents installation for downward flow.
Figure 2: Vertical pipe installation Figure 3: Probe alignment
5° MAX
5° MAX
Flow
Flow Meters
Page 4 April 2014
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