46-160 External Cage Liquid Level Switches for the Power

External Cage
Liquid Level Switches for the
Power Generation Industry
DESCRIPTION
The models included in this bulletin are sealed
external cage liquid level switches selected specifically
for use in power generation plants. All models are
float-activated and provide highly reliable control in
critical applications. Finned cooling extensions and a
selection of dry contact switches are available for use
in installations with process temperatures as high as
+1200° F (+649° C). Magnetrol float level switches are
designed to ensure a long service life with little
required maintenance.
Model B73
FEATURES
• Process pressures up to 3300 psi (228 bar)
• Process temperatures up to +1000° F (+538° C)
with standard models
• Finned temperature extensions for applications
to +1200° F (+649° C)
Model B75
• Specific gravity ratings as low as 0.59
• Numerous snap switches to choose from
• Gold contact switch options available
• Carbon steel, stainless steel, and chrome-moly
float chambers
• All stainless steel floats & trim parts
APPLICATIONS
• Drip legs
• Hot wells
• Deaerators
• Feedwater heaters
• Steam drums
• Flash tanks
Model B40
MODEL
NUMBER
MODEL NUMBER CODE
Pressure Ratings – psi (bar)
Model
Minimum
S.G.
+100° F (+38° C)
+450° F (+232° C)
B73-1B30
0.59
400 (28)
275 (19)
B72-1B20
0.76
500 (34)
465 (32)
435 (30)
400 (28)
B75-1B20
0.67
1000 (69)
930 (64)
870 (60)
716 (49)
357 (25)
138 (10)
V75-1B20
0.74
2240 (154)
1980 (137)
1913 (132)
1455 (100)
728 (50)
n/a
Z75-1B20
0.68
2193 (151)
1980 (137)
1913 (132)
1425 (98)
713 (49)
n/a
B40-5C20
0.65
2085 (144)
1845 (127)
1794 (124)
1350 (93)
665 (46)
165 (11)
B40-1B60
0.65
2067 (143)
1793 (124)
1751 (121)
1670 (115)
1268 (87)
651 (45)
B40-4C40
0.65
3300 (228)
3221 (222)
3132 (216)
2956 (204)
2824 (195)
2735 (189)
+900° F (+482° C) Œ
+750° F (+399° C)
+550° F (+288° C)
+1000° F (+538° C) Œ
n/a
n/a
Chamber
Float
Trim
Process 
Connections
B73-1B30
Carbon steel
316/L SS
300 & 400 Series SS
1" NPT/SW, side/bottom
B72-1B20
Carbon steel
316/L SS
300 & 400 Series SS
1" NPT/SW, side/bottom
B75-1B20
Carbon steel
316/L SS
300 & 400 Series SS
1" NPT/SW, side/bottom
V75-1B20
Carbon steel
17–7 ph SS
300 & 400 Series SS
1" NPT/SW, side/bottom
Z75-1B20
Carbon steel
17–7 ph SS
300 & 400 Series SS
1" NPT/SW, side/bottom
B40-5C20
Carbon steel
321/347 SS
300 & 400 Series SS
1" SW, top/bottom
B40-1B60
Chrome-moly
321/347 SS
300 & 400 Series SS
1" SW, top/bottom
B40-4C40
316 SS
321/347 SS
300 & 400 Series SS
11⁄2" SW, top/bottom
Model
Minimum S.G.
ELECTRIC SWITCH MECHANISM AND ENCLOSURE
Switch Description
Models
Model
B73 & B72 only
B75 only
Process Temp.
Contacts
Range °F (°C)
Nema ATEX Nema ATEX
4X
IP66
4X
IP66
Models V75
Model B40-1
Model B40-5
and Z75 only and B40-4 only
only
Nema
4X
ATEX
IP66
Nema
4X
Series B Snap Switch Ž
-40 to +250
(-40 to +121)
SPDT
BAR
BAC
BAD
BCC
BAM
BC9
DPDT
BDR
BBC
BDD
BFC
BDM
BF9
Series C Snap Switch
-40 to +450
(-40 to +232)
SPDT
CAR
CAC
CAD
CCC
CAM
CC9
DPDT
CDR
CBC
CDD
CFC
CDM
CF9
SPDT
FAR
FAC
FAD
FCC
FAM
FC9
FAM
DPDT
FDR
FBC
FDD
FFC
FDM
FF9
FDM
SPDT
HS2
HA9
HS2
HA9
HS2
HA9
DPDT
HS6
HB9
HS6
HB9
HS6
HB9
R1M
RC9
R1M
RC9
Series F Hermetically Ž
Sealed Snap Switch
-50 to +750
(-46 to +399)
Series HS Herm. Sealed 5 amp
Snap Switch w/Terminal Block
-50 to +400
(-46 to +208)
Series R High Temperature
Snap Switch
-40 to +1000
(-40 to +538)
Series S High Temperature
Snap Switch
-40 to +550
(-40 to +288)
SPDT
DPDT
n/a
SPDT
DPDT
Nema
4X
CAM
CC9
CDM
CF9
FC9
FAM
FC9
FF9
FDM
FF9
HS2
HA9
n/a
n/a
R5M
HB6
RW5  R1M
n/a
SAM
SA9
SDM
SB9
Œ Use caution when specifying carbon and stainless steels for temperature greater than +800° F (+427° C), as it becomes sensitized.
 Other types and sizes of process connections available. Consult factory.
Ž Standard contacts are silver. Gold contacts available. Consult Factory.
 The ATEX housing provided with codes RW5 and RU5 is cast iron. All other ATEX codes specify cast aluminum enclosures.
CONSTRUCTION
OPTIONS
• Most models available designed, built and certified to ASME B31.1 power piping code. Consult factory.
• Model B40-1B60 is available in high pressure design rated for 2533 psi @ +100° F (175 bar @ +38° C) or
1200 psi @ +1000° F (83 bar @ +538° C). Consult factory.
• Other process connection types and sizes available. Consult factory.
• Series B, F and HS switch available with gold contacts. Consult factory.
• Second switch mechanism available on models B75, V75, and Z75. Consult factory.
2
ATEX
IP66
n/a
n/a
n/a
ATEX
IP66
HB9
RU5 
n/a
PROCESS
TEMPERATURE
RATING
OF
SWITCH
Number of Finned Extensions Required Œ
Switch
Series
0
1
2
3
4
B
+250° F (+121° C)
n/a
n/a
n/a
n/a
C
+450° F (+232° C)
+500° F (+260° C)
+550° F (+288° C)
+600° F (+316° C)
+650° F (+343° C)
F
+750° F (+399° C)
+850° F (+454° C)
+950° F (+510° C) +1050° F (+566° C) +1150° F (+621° C)
HS
+400° F (+204° C)
n/a
n/a
R
+1000° F (+538° C) +1150° F (+621° C) +1200° F (+649° C)
S
+550° F (+288° C)
+600° F (+316° C)
+700° F (+371° C)
n/a
n/a
n/a
n/a
+750° F (+399° C)
+800° F (+427° C)
Œ For model B40s with one standard finned extension, the number of required extensions is
in addition to the one standard finned extension
 Applies to the S Series switch for AC Applications only (codes SA, SD, SK, and SN).
SWITCH
Finned Heat Extensions
ENCLOSURES
• NEMA 4X blue polymer coated carbon steel,
weather resistant for non-hazardous areas
• ATEX, IP66, NEMA 4X/7/9 blue polymer coated
aluminum and cast iron enclosures
ATEX, IP66, NEMA 4X/7/9
Aluminum Enclosure
BASIC
NEMA 4X
Carbon Steel Enclosure
ELECTRICAL
ATEX, IP66, NEMA 4X/7/9
Cast Iron Enclosure
RATINGS
Switch Series and Non-inductive Ampere Rating
Voltage
B
Gold B
C
F
Gold F
HS
Gold HS
R
S
3
120 VAC
15.00
1.00
15.00
2.50
—
5.00
1.00
1.00
15.00
13.00
240 VAC
15.00
—
15.00
—
—
5.00
—
1.00
15.00
6.50
24 VDC
6.00
1.00
10.00
4.00
1.00
5.00
1.00
1.00
—
10.00
120 VDC
0.50
—
1.00
0.30
—
0.50
—
0.40
1.00
10.00
240 VDC
0.25
—
0.50
—
—
0.25
—
—
0.50
5.00
3
AGENCY
APPROVALS
AGENCY
MODEL APPROVED
APPROVAL CLASSES
FM
All with an electric switch mechanism and a housing
listed as NEMA 4X
Non-hazardous
NEMA 4X
CSA
All with an electric switch mechanism and a housing
listed as NEMA 4X/7/9
Non-hazardous CSA
Type 4X
ATEX
All with an electric switch mechanism and an
ATEX housing
ATEX II 2 G EEx d IIC T6
94/9/EC
IP66
CE
All models
Installation Category II
Pollution Degree 2
Low Voltage Directives
2006/95/EC
per Harmonized Standard
EN 61010-1/1993 & Amendment No. 1
QUALITY
The quality assurance system in place at Magnetrol
guarantees the highest level of quality throughout
the company. Magnetrol is committed to providing
full customer satisfaction both in quality products
and quality service.
The Magnetrol quality assurance system is registered to ISO 9001 affirming its commitment to
known international quality standards providing the strongest assurance of product/service
quality available.
WARRANTY
All Magnetrol mechanical level and flow controls are warranted free of defects in materials
or workmanship for five full years from the
date of original factory shipment.
If returned within the warranty period; and,
upon factory inspection of the control, the
cause of the claim is determined to be covered
under the warranty; then, Magnetrol will repair
or replace the control at no cost to the purchaser
(or owner) other than transportation.
Magnetrol shall not be liable for misapplication,
labor claims, direct or consequential damage or
expense arising from the installation or use of
equipment. There are no other warranties
expressed or implied, except special written
warranties covering some Magnetrol products.
5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com
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Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317
Copyright © 2011 Magnetrol International, Incorporated. All rights reserved. Printed in the USA.
Performance specifications are effective with date of issue and are subject to change without notice.
BULLETIN: 46-160.1
EFFECTIVE: August 2010
SUPERSEDES: June 2004