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Wallace & Tiernan® Series 55-200 Armored Flowmeter
Key Benefits:
Economical metering and service
Higher capacities then other designs
Stable readings
Reliable flow indication and flow switching
Choice of mounting arrangement - NPT or
Flanged
Choice of flow switching - external or
integral
Field convertible electronic transmitter Water Technologies
Wallace & Tiernan®
Series 55-200
Armored Flowmeter
The Wallace & Tiernan® Series 55-200 Armored Flowmeter
is a low cost, 5% accuracy, all metal meter for high-pressure
and high-temperature flow applications. Its plug and orifice
design, overall simplicity, and minimal parts add up to an
economical meter. Size for size, Wallace & Tiernan® Armored
Flowmeters give high capacities, reliable indication or
transmission of flow, and dependable service.
Features
Low Cost
The plug and orifice design, overall simplicity, and minimal
parts add up to an economical meter.
High Capacities
Size for size, Wallace & Tiernan® Armored Flowmeters give
high capacities. The plug and orifice concept yields capacities
often double that of other designs.
Compact
The self-guiding float requires no rods. The meter is shorter
than other designs, which saves space.
High Pressure and Temperature Gas Service
Limits are 1500 psi and 200°F for gas; 1500 psi and 400°F
for liquids.
Reliable Gas Measurement
Readings steady out quickly. A special polypropylene float
gives stable readings. It minimizes violent reactions to flow
surges, especially at start-up.
Reversible, Dual Scale
A reversible scale with gpm water on one side and percent
of maximum flow on the other is standard for easy readout
changes.
Reliable Operation
Rotation of the flow switch and indicator magnets is almost
frictionless. This and the powerful bond with the float magnet
means reliable indicating and flow switching.
Output
The standard readout is in a magnetically coupled indicator
unit. Optional 4-20 mA transmitter and alarm switches are
also available. 2
Technical Data
Accuracy ±5% of full scale.
Range 10 to 1.
Connections NPT female or 150 lb.
flange
Mounting Vertical, in-line.
Scales Reversible scale calibrated 0-
100% of full flow on one side and gpm
water on the other. Scale length is six
inches. Special scales optional.
Materials of Construction
Metering tube, end fittings, and orifice are
316 stainless steel. For liquid service, float
is 316 stainless with 301 stainless steel
guide; for gas, polypropylene or optional
TFE body with 301 stainless steel guide.
Alarm and indicator housings are cast
aluminum finished with special baked-
on vinyl melamine enamel for corrosion
resistance. Write for WT.500.001.000.
UA.PS, which is a detailed listing of meter
compatibility with a wide range of fluids.
Selection Procedure For Gas Service
Determine the capacity range, temperature and pressure capability, materials of
construction, and options required for each meter. Determine compatible float material
from chemical supplier information. Table G capacities are air SCFM at 14.7 PSIA and
70ºF. If the gas is other than the above, its flow rate must be converted to SCFM air
(Equivalent Flow Rate)
Table A - Formulas
Fluid Condition
Equivalent
Flow Rate
=
Desired
Flow Rate
x
Correction Factors
Standard (Q
S
)
Qe (SCFM)
=
Qs
x
Fg x Fp x Ft x Fu
Weight (W)
Qe (SCFM)
=
W x 13.33*
x
1/Fg x Fp x Ft x Fu
How to Determine Air Equivalent
From Table A select appropriate
Formula to determine Equivalent Flow
Rate (Qe).
From Table B determine Fg from
Specific Gravity Correction factors.
From Table C determine Fp from Back-
Pressure Correction factors.
From Table D determine Ft from
Temperature Correction factors.
From Table E determine Fu from Unit
Conversion factors.
Work Formula to obtain Equivalent
Flow Rate (Qe).
Use Equivalent Flow Rate to select tube
and float code from Table I on page 4.
1.
2.
3.
4.
5.
6.
7.
Table B - Gas Specific Gravity
Correction F
T
Table C - Operating Pressure
Correction F
p
Table D - Operating Temperature
Correction F
T
F
G
=
S
P
.G
R
.
F
P
=
14.7
14.7 + psig
F
T
=
460 + F
530
Table E - Unit Conversion F
u
LITERS/MIN
X
.03532
=
CU FT/MIN
CU METERS/MIN
X
35.316
=
CU FT/MIN
LB/MIN
X
1.0
=
LB/MIN
KG/MIN
X
2.205
=
LB/MIN 3
3
SELECTION pROCEDuRE FOR LIQuID SERVICE
Determine the capacity range, temperature and pressure capability, materials of
construction, and options required for each meter. Determine compatible float material
from chemical supplier information. If the liquid is other than water, the desired units
are other than GPM, therefore its flow rate must be converted to GPM water (Equivalent
Flow Rate).
Table F - Liquid-Specific Gravity
Correction Fe
Specific
Gravity
Fe
Specific
Gravity
Fe
0.50
.682
1.30
1.164
0.55
.718
1.35
1.192
0.60
.753
1.40
1.218
0.65
.786
1.45
1.244
0.70
.818
1.50
1.271
0.75
.851
1.55
1.296
0.80
.882
1.60
1.323
0.85
.912
1.65
1.347
0.90
.941
1.70
1.374
0.95
.971
1.75
1.400
1.00
1.000
1.80
1.426
1.05
1.026
1.85
1.450
1.10
1.055
1.90
1.475
1.15
1.083
1.95
1.503
1.20
1.110
2.00
1.527
1.25
1.137
Note: To determine Fe for specific gravi-
ties not shown in Table F, use liquid-spe-
cific gravity correction equation.
F
E
=
S
P
.G
R
.
How to Determine Water Equivalent
For liquids with viscosities greater than the
viscosity ceiling, consult distributor. For liquids
with specific gravity other than 1.0, follow the
formula to determine Equivalent Flow Rate in
GPM (Qe).
Equivalent
Flow Rate =
Desired
Flow Rate x
Correction
Factors
Qe GPM =
Qd
x Fe x Fu
From Table F, determine Fe from Specific
Gravity Correction factors.
From Table G, determine Fu from Unit
Conversation factors.
Work formula to obtain Equivalent Flow
Rate (Qe).
Use Equivalent Flow Rate to select tube and
float code from Tables I and J on page 4.
Table G - Unit Conversion Fu
IMP
GAL/MIN x 1.201
= GAL/MIN
LTR/MIN
x .2642
= GAL/MIN
LBS/MIN x .1198 ÷ S
l
= GAL/MIN
KG/MIN
x .2641 ÷ S
l
= GAL/MIN
Table H - Liquid Specific Gravity Correction
Equation
1.
2.
3.
4.
4
4
Table I - Capacity Codes
Code
Connection
Size
Air
(SCFM)
Water
(GPM)
Pressure
Drop
(in H
2
O)
Viscosity
Ceiling
(cSt)
Process Limits*
Float Mate-
rial
Temperature
Pressure
(PSI)
Liquid
Gas
01
½
1.2
9
Polypropylene
02
0.5
23
3
316SS
03
2.4
10
Buna-N
O-rings
200°F
Buna-N
O-rings
200°F
Polypropylene
04
1.0
24
3
316SS
05
6.5
13
Polypropylene
06
2.4
30
4
316SS
07
10
17
Polypropylene
08
5.0
46
5
Viton
O-rings
400°F
Viton
O-rings
200°F
NPT:
316SS
09
1
12
9
½-1½
Polypropylene
11
24
11
1500 PSI
Polypropylene
12
12
35
10
2
316SS
13
40
16
1200 PSI
Polypropylene
14
24
52
10
316SS
16
1½
34
54
21
EPR
O-rings
250°F
EPR
O-rings
200°F
Flanged:
316SS
17
76
15
150 PSI
Polypropylene
18
75
85
18
316SS
21
2
150
18
Polypropylene
22
130
100
65
316SS
23
½
1.3
10
Buna-N
O-rings
200°F
TFE
24
2.6
11
TFE
25
7.0
12
TFE
26
10
20
Viton
O-rings
400°F
TFE
27
1
15
10
TFE
28
27
12
TFE
29
54
18
EPR
O-rings
250°F
TFE
30
1Ì
100
16
TFE
31
2
190
20
TFE
* Pressure and Temperature limits should not be exceeded.
5
5
Table J - Ordering Procedures for Tubes and Floats
ORDERING pROCEDuRE
Example: to order a 1/2" NPT Armored Flowmeter with indicator only, plastic window,
Buna-N O-rings, direct reading scale in GPM, and maximum capacity of 5.0 GPM water
specify: 5520M02108XUXUX
1
2
3
4
5
6
7
8
9
5
5
2
M 0
2
552
Code
0
Code
M02
F02
Code
1
2
4
Code
6
HAZ. 4-20 mA 2-Wire X-mitter
Code
X
A
B
C
D
G
H
Basic
Arrangement
Indicator Only (Standard)
Output
P
Description
Description
O-Rings
8
Capacity Code For Meter
Connections
Description
NPT
Flanged
Select from Table I (Water or Air / NPT or
Flanged)
Buna N (Standard)
Viton (Optional)
EPR (Optional)
See Table I for Temperature and
Pressure Limits.
GP 2 Switches
GP 1 Switch / 1 Relay
GP 2 Switches / 2 Relays
Description
Exterior Flow Switch
Description
None (Standard)
HAZ. 1 Switch / 1 Relay
Haz. 2 Switches / 2 Relays
1
Indicator with GP Integral Switch
for low flow alarm
Indicator with I.S. integral
Switch for high flow alarm
Indicator with GP Integral Switch
for high flow alarm
Indicator with I.S. Integral
Switch for low flow alarm
2
7
GP 1 Switch
*Select either Electronic Transmitter or
Exterior Fow Switch.
Dial Calibration
Code
B
D
Direct Reading (Optional)
Percent % (Standard)
Description
Gas
I
Description
Code
Liquid
Tag
U
Direct Reading (Optional)
Percent % (Standard)
In GPM (Standard)
Stainless Steel
1
Code
Description
None (Standard)
X
Optional Window
Code
T
U
Description
Glass Window
Plastic Window (Standard)
Voltage for Barrier
(Integral Switch Only)
Code
Description
None (Standard)
Note: Your order number should
consist of 15 characters.
E