Badger Meter AS - Steam User Manual
Ellipse® Pitot Tube Meter
AS Annular Threaded Steam Meter
PTT-UM-00515-EN-02 (April 2014)
User Manual
Ellipse® Pitot Tube Meter, AS Annular Threaded Steam Meter
CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pipe Orientation and Sensor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation Instructions, Single Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Instructions, Double Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Typical Installation with Dierential Pressure Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Location Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Flow Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
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 AS 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
Figure 1: AS pressure sensing holes
SPECIFICATIONS
Applications Steam
Pipe Sizes
Pressure
Temperature
Accuracy
Turndown Ratio
Standard Components
Reynolds Number
Resonance
2…48 inches (50…1220 mm)
600 psi (4100 kPa) maximum
480° F (250° C) maximum
±0.75% of reading
17:1 with no vacuum effect
T-type head, 316 SS 1/2" FNPT connection
CS compression fitting with SS ferrule
CS 3000 lb weld fitting, ASTM A105
316/316L SS Ellipse sensor
316 SS ID tag with wire
Greater than 75,000 maintains most accurate flow measurements
Less than 75,000 consult factory for estimated results
If greater than 0.8, use double support.
Table 1: Specifications
Page 3 April 2014
Loading...