Badger Meter Hedland T303 User manual

User Manual
Variable Area Flow Meters
Inline Pneumatic Flow Meter
VAM-UM-00593-EN-02 (August 2014)
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CONTENTS
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operating Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Compressibility of Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installing the Flow Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Installing the Test Kit Flow Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Multi-Pressure Flow Scales. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Single Pressure Flow Scales . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Removal of Dust Guard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Quick Recoupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Test Kit Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Fluid Selection Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Flow vs. Pressure Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Air/Compressed Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Air/Compressed Test Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Air/Caustic and Corrosive Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Materials of Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Standard Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Test Kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Variable Area Flow Meters, Inline Pneumatic Flow Meter
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INTRODUCTION
The Inline Pneumatic Flow Meter is a rugged industrial class flow rate indicator and is offered in aluminum, brass, T303 and
T316 stainless steel models to monitor pressurized air lines and a wide range of other compressed gases. Available in seven
port sizes from 0.25…3 inch for flow ranges from 0.5…5 scfm (0.2…2.2 l/sec) through 200…2200 scfm (75…1130 l/sec),
meters are calibrated at 1.0 specific gravity. In addition to the basic model, the aluminum, brass and T303 stainless steel
models are offered in three configurations: an extended inlet cap fitted with a pressure gauge, an extended inlet cap with a
0.25 inch NPTF plugged gauge port, and a test kit with an extended inlet cap fitted with a 160 psi pressure gauge and control
valve on the outlet.
The Flow Meter is equipped with a 360° rotatable guard/scale which allows the meter to be installed in any orientation
without regard to scale direction. Once the meter is permanently installed, the guard/scale can be rotated 360° to
optimize readability.
The unique spring loaded design of this variable area flow meter allows it to be installed in any position, including inverted,
without affecting accuracy. An optional inverted scale is available for these applications.
Aluminum models are offered as a rugged, low cost flow meter for monitoring noncorrosive pneumatic systems under
operating pressures up to 1000 psi (69 bar), 250 psi (17 bar) for 3" models, and 600 psi (41 bar) for test kits.
Brass meters are recommended for applications with operating pressures up to 1000 psi (69 bar) without corrosion inhibitors.
Stainless Steel is available for monitoring systems operating at pressures up to 1500 psi (103 bar). The T316 stainless steel
models are recommended for monitoring caustic or corrosive gases, such as hydrogen chloride or sulfur dioxide. The T303
stainless steel test kit is rated to 600 psi (41 bar); pressure rating is limited by the valve. For further construction material
information, see "Materials of Construction" on page 15 .
Introduction
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OPERATING PRINCIPLE
The Flow Meter is a variable area instrument. A sharp-edged orifice, located within the piston assembly, forms an
annular opening with the contoured metering cone. The piston assembly carries a cylindrical PPS/ceramic magnetthat
is magnetically coupled to an external indicating magnet, which moves precisely in direct response to movement of the
piston. A calibrated springopposes flow in the forward direction.
The Hedland variable area flow meters are the most readable products in their class. Brightly colored indicators move over the
graduated, linear flow scalewhich contains bold, easy-to-read numeral and gauge marks. The enhanced resolution virtually
eliminates parallax problems associated with competitive direct reading flow meters.
Figure 1: Inline pneumatic flow meter
Operating Principle
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INSTALLATION
THIS PRODUCT SHOULD BE INSTALLED AND SERVICED BY A TECHNICALLY QUALIFIED PERSONNEL TRAINED IN
MAINTAINING INDUSTRIAL CLASS FLOW INSTRUMENTATION AND PROCESSING EQUIPMENT.
READ INSTRUCTIONS THOROUGHLY BEFORE INSTALLING THE UNIT. IF YOU HAVE ANY QUESTIONS REGARDING
PRODUCT INSTALLATION OR MAINTENANCE, CALL YOUR LOCAL SUPPLIER FOR MORE INFORMATION.
THIS METER MAY CONTAIN RESIDUAL AMOUNTS OF TEST FLUID AT THE TIME OF SHIPMENT. THIS FLUID SHOULD BE
REMOVED PRIOR TO INSTALLATION AS THE FLUID MAY BE INCOMPATIBLE OR HAZARDOUS WITH SOME LIQUIDS OR
GASES. FAILURE TO FOLLOW THESE INSTRUCTIONS COULD RESULT IN DAMAGE TO THE EQUIPMENT.
THIS STANDARD METER IS UNIDIRECTIONAL. ATTEMPTS TO FLOW FLUIDS IN THE OPPOSITE DIRECTION OF THE FLOW
ARROW WILL RESULT IN THE METER ACTING AS A CHECK VALVE, CREATING A DEADHEADING SITUATION. IF THE
DIFFERENTIAL PRESSURE MAGNITUDE IS GREAT ENOUGH, DAMAGE TO THE INTERNAL PARTS OF THE METER WILL
RESULT.
A LINE SNUBBER IS RECOMMENDED FOR APPLICATIONS IN WHICH RAPID VALVE ACTUATION OR PULSATION IS
ANTICIPATED. THIS NOT ONLY REDUCES THE RISK OF DECOUPLING THE FLOW METER'S MAGNETIC PISTON, IT ALSO
REDUCES EXCESSIVE WEAR ON OTHER COMPONENTS IN THE SYSTEM.
Compressibility of Gases
Gases are significantly compressible so the density of any compressed gas will vary according to changes in operating
pressure levels. In other words, volumetric flow rates will vary significantly with changes in line pressure. Therefore, pneumatic
flow meters should be installed with a pressure gauge located as close as possible to the inlet port. The psig range capacity
of this pressure gauge should be at least 125% of the anticipated pressure in the system, or be suitable for the maximum
expected line pressure (if higher). For example, if the anticipated operating pressure is 100 psig, a pressure gauge with a
capacity of at least 125 psig should be installed as close as possible to the inlet port.
Installation
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Installation Recommendations
The inline flow meter is a simple device to install. However, the following measures are recommended for reliable, trouble-
free operation:
1. Piping should be accurately aligned and of correct length. The high pressure body of the ow meter can withstand
shock and ow/pressure pulsation. However, the piping should be rmly supported by external mounting brackets, both
upstream and downstream of the meter, to avoid any pipe exing actions that could reduce meter life.
2. If the ow meter inlet or outlet are to be rigidly mounted, and the opposing port is to be connected to a exible hose, the
end connected with the exible hose must be rigidly mounted.
3. Use Teon® tape for sealing NPT tting.
4. Install a union near the inlet or outlet of the meter for quick, easy meter removal and inspection during periodic
maintenance procedures.
5. Mount the meter either horizontally or vertically (ow arrow pointing to either side or straight up). If the meter must be
mounted inverted, special inverted scales are available.
6. Ensure the uid is traveling in the direction of the ow arrow (see Figure 2).
7. Systems that do not have ltration should be equipped with at least a 200 mesh (74 micron) lter. Most systems already
have much ner ltration. The meter will allow particulate to pass that would jam most valves and ow controls. Dirt,
ferrous metal or sealing agents, such as Teflon® tape may lodge and cause malfunction. If the meter is jammed at a fixed
position, see "Removal of Dust Guard" on page 11.
8. Don not use thread locking compounds as thread sealant.
9. Do not install the ow meter near turbulence producing ttings such as elbows, reducers and close coupled valves for
maximum reliability. The inline ow meter does not require ow straighteners or special lengths of straight inlet/outlet
piping to stabilize turbulent ow patterns.
10. Do not install the meter near fast-acting valves. Fast-acting valves have the potential to create high magnitude hydraulic
pressure spikes. These spikes can damage the internal components of the meter, resulting in inaccuracies or malfunction.
11. Do not allow unidirectional meters to be operated against the direction of the ow arrow. The standard ow meter is an
unidirectional ow meter. The piston acts as a check valve to block ow in the reverse direction. This causes an excessive
pressure dierential, which can result in damage to internal meter components.
Installing the Flow Meter
1. Mount the meter so uid is traveling in the direction of the ow arrow. See Figure 1 on page 4.
Flow Direction
Arrow
AIR
Figure 2: Flow direction arrow
2. Select a mounting location that is suitable for viewing and product service. To connect the ow meter into the piping
system, place an open-ended wrench onto the ow meter wrench ats adjacent to the pipe connection being installed.
DO NOT wrench on the opposite end of the ow meter or leakage may result. See Figure 3 on page 7.
Installation
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Place wrench on meter ats on the same side
plumbing is being tightened
Never place wrench on meter ats opposite
plumbing being tightened
Figure 3: Installing meter
3. After installation, rotate the meter by hand to the view ow scale. See Figure 4.
Rotate meter by hand to view ow scale
Never use wrench to rotate meter
body when viewing ow scale
Figure 4: Rotating meter
Installation
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Installing the Test Kit Flow Meter
1. Mount the VA High Pressure Test Kit Flow Meter so uid is traveling in the direction of the ow arrow. See
Figure 2 on page 6.
2. Install the test kit at any location in the pneumatic circuit that is suitable for viewing. To connect the test kit into the piping
system, place an open-ended wrench onto the test kit extended cap on the inlet side or on the test kit wrench at on the
outlet side adjacent to the pipe connection being installed. Do not wrench on the opposite end of the test kit or leakage
may result. See Figure 5.
Place wrench on valve body
on the same side plumbing is being tightened
Never place wrench on valve body
opposite plumbing being tightened
Figure 5: Installing test kit
Or, use quick disconnect couplings for easy connections and to keep the test kit sealed and clean when not in use.
3. After installation, rotate the meter by hand to the view ow scale. See Figure 6.
Rotate meter by hand to view ow scale
Never use wrench to rotate meter
body when viewing ow scale
Figure 6: Rotating test kit
Installation
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OPERATION
Multi-Pressure Flow Scales
The inline pneumatic flow meter is offered with a multi-pressure flow scale to visually indicate air flow rates in standard cubic
feet per minute (scfm) at 1.0 s.g. (70° F at 100 psi) or liters per second (l/sec) at 1.0 s.g. (21° C at 6.9 bar). The multi-pressure
scale design allows for use at line pressures from 40…130 psi in 10 psi increments (3.0…9.0 bar in 1 bar increments). This
configuration requires that a pressure gauge be installed at the meter inlet.
Read the inlet gauge pressure then select the appropriate vertical line or interpolated value closest to the gauge reading
and follow the line until it intersects the brightly colored horizontal indicator bar. The flow rate is read by taking the
intersection points, following the slope of the closest diagonal line to a scale value and interpolating the scfm (l/sec) flow
rate. No further calculations are required. See Figure 7.
50
40
30
20
10
5
120 130 110 100 90 80 70 60 50 40
SCFM @ 70°F
INLET PRESSURE (PSIG)
HORIZONTAL
INDICATOR BAR
AIR
Figure 7: Multi-pressure flow scale
Single Pressure Flow Scales
An optional single pressure flow scale is available in U.S. or metric units. This graduated scale is calibrated for air in standard
cubic feet per minute (scfm) at 1.0 s.g. (70° F at 100 psi), or liters per second (l/sec) at 1.0 s.g. (21° C at 6.9 bar). See Figure 7.
A standard cubic foot of air is defined as a cubic foot of air at 70 °F at atmospheric pressure 14.7 psia at sea level. Since it is
impossible to flow air at“standard”conditions, the scale is calibrated for an inlet condition of 100 psi (6.9 bar) at 70° F (21° C).
A correction factor must be calculated to determine the actual air volume. Each meter is supplied with the Conversion Chart,
see “Conversion Chart” on page 10.
AIR
25
20
15
10
5
3
25
20
15
10
5
3
25
20
15
10
5
3
SCFM
100 PSIG @ 70 ºF
Figure 8: Single pressure flow scale
Operation
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Application Information
Compressibility of Gases
Gases are significantly compressible so their density varies with pressure and temperature. Use Table 1 to convert indicated
scfm flow rates to actual scfm flow rates for your application.
Effects of Specific Gravity
Standard scales are calibrated for air with a specific gravity of 1.0. Use Table 3 of the conversion chart ito calculate“actual”scfm
flow rates of gases with a specific gravity other than 1.0.
Conversion Chart
The conversion chart provides a series of simplified mathematical formulas to adjust the graduated scale for changes in
pressure (see Table 1), temperature (see Table 2), or specific gravity (see Table 3). Special scales can be made to accommodate
other pressures, temperatures and specific gravity.
The conversion chart can also be used to adjust the multi-pressure flow scale to indicate flow rates in applications beyond the
parameters stated on the scale.
To adjust for pressures beyond (above or below) scale limits:
1. Locate point at which the brightly colored indicator line intersects the vertical 100 psig pressure line.
2. Divide this reading by the pressure correction factor (f₁) indicated in the conversion chart.
To adjust for changes in temperature:
1. Divide the 100 psig ow rate reading by temperature correction factor (f₂).
To adjust for changes in specific gravity:
1. Establish the square root of the new specic gravity.
2. Divide the 100 psig ow rate reading by the specic gravity correction factor (f₃).
psig 25 50 75 100 125 150 175 200 225 250
bar 1.7 3.5 5.2 6.9 8.6 10.4 12.1 13.8 15.5 17.2
kPa 172 345 517 689 862 1034 1207 1379 1551 1724
f11.700 1.331 1.131 1.000 0.902 0.835 0.778 0.731 0.692 0.658
fpsig 1114 7
14 7
=
+
.
.fBAR
17 914
1 014
=
+
.
.fkPa
1790 857
101 357
=
+
.
.
Table 1: Pressure correction factor
°F +10 +30 +50 +70 +90 +110 +130 +150 +170 +190
°C –12.2 –1.1 +909 +21.0 +32.1 +43 +54 +65 +76 +88
f20.942 0.962 0.981 1.000 1.018 1.037 1.055 1.072 1.090 1.107
fF 2460
530
=+° fC 2273
293
=+°
Table 2: Temperature correction factor
fSpGr3=
..
Table 3: Specific gravity correction factor
Operation
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