B73 Float Level Switch BE46-119

ITY &
QUAL LESS
D
E
T
R
ASSU ICE COS
V
R
E
S
01
®
ISO
SERIES
B73
90
B73 instruments are float operated liquid level controls
designed for external float cage mounting.
These instruments are ideally used for off-on liquid level
control, alarm and safety shut-down service in a wide
variety of applications including large steam-electric
generating stations, oil refineries and chemical processing
operations. The B73 is available with either a carbon steel
or stainless steel float cage and is suitable for service
pressure ratings up to 20.7 bar (300 PSIG) and specific
gravity ratings down to 0.60.
Liquid float
Level switches
B73 offer standard design as an economical
answer to a wide variety of applications.
FEATURES
Magnetrol’s B73 level control offers cost effective quality
built liquid level control with the reliability of magnetic
switching.
SEALED FLOAT CAGES – the welded float cage design
allows high pressure ratings and leak proof operation.
CHOICE OF SWITCH MECHANISM – models are available
with mercury switches, dry contact switches for vibration
applications, and pneumatic pilot switches.
CHOICE OF SWITCH HOUSING – electric switch
mechanisms are housed in a choice of moisture proof (IP 65)
NEMA 4X, explosion proof NEMA 7/9 (CSA/FM), BASEEFA
or CENELEC enclosures. Pneumatic switches are equipped
with standard housing rated as NEMA 3R.
STAINLESS STEEL CONSTRUCTION – for corrosive
service applications a series of models is available
constructed completely of type 316 stainless steel.
STANDARD PRODUCT CONSTRUCTION
Standard B73 controls incorporate the following construction
details:
FLOAT CAGE – seamless carbon steel sections welded
together with float totally enclosed (SST available).
TANK CONNECTIONS – 1" NPT standard; socket weld and
flanged connections available.
FLOAT – Type 316 SST.
INTERNAL TRIM – Types 300 and 400 series SST.
SWITCH & ENCLOSURE – See SELECTION DATA on p. 3.
SPECIFIC GRAVITY & PRESSURE RATING
Min specific
gravity
B73
0,60
Pressure rating
Bar @ °C
PSIG @ °F
40°C
230°C
100°F 450°F
20,7
19,0
300
275
APPROVALS
Agency
Approval ➀
CENELEC
EEx d IIC T6, explosion proof
EEx ia IIC T6, intrinsically safe➁
BASEEFA
Ex d IIC T6
CSA
➀
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F & G
Class I, Div. 1, Groups B, C & D
Class II, Div. 1, Groups E, F & G
FM
➀
OPERATING PRINCIPLE
A permanent magnet is attached to a pivoted switch
mechanism. As the float rises following the liquid level, it
raises the magnet attractor into the field of the magnet,
which in turn snaps against the non-magnetic barrier tube,
tilting the switch mechanism. The barrier tube provides a
static seal between the switch mechanism and the float.
Non-Hazardous CSA Type 4X
Class I, Div. 2, Groups B, C & D
Non-Hazardous NEMA 4X
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F & G
Class I, Div. 1, Groups B, C & D,
Class II, Div. 1, Groups E, F & G
SAA ➀
Ex d IIC T6 (IP65)
➀ Not available with all switches; Consult factory for proper
model numbers.
➁ Consult factory for proper model numbers.
Worldwide level and flow solutions
AVAILABLE SWITCH MECHANISMS AND APPLICATION DATA
B73 controls are available with several different switch mechanisms – each designed for specific service conditions. Brief
descriptions of the individual switch mechanisms and their application are given below.
Mercury switches – Series A & E
Hermetically sealed switches – Series F, HS, W & X
Mercury switches offer the advantage of quick visual
inspection of contact conditions.
Series A switches are heavy duty units with high load
carrying capability.
Series E switches are specifically designed to provide
greater vibration resistance.
Hermetically sealed switches are for use in special
applications where hermetically sealed contacts are
required.
The Series F switch is well suited for use in applications
where the process temperature does not exceed 400°C
(750°F).
The Series HS switch features a positively pressurized
capsule for the entire swicht mechanism including contacts.
It is suited for use in applications where the process
temperature does not exceed 290°C (550°F). It is available
with easy access terminals. These switches are ideal where
salt and other corrosive atmospheres are found.
Series W have silverplated and Series X have goldplated
contacts; both suitable for liquid temperatures up to 230°C
(450°F).
Mercury
Series HS
with terminal block
Dry contact switches – Series B, C, D & U
These switches are specified in applications where mercury
must be avoided – such as in nuclear power plant
installations.
Series B and C switches are general purpose units with
electrical ratings dependent upon maximum liquid
temperature.
Series D switches are designed for high DC current
applications.
Series U have gold alloy contacts.
Series W & X
Pneumatic Switches – Series J & K
Pneumatic switches are employed in process industry
applications where electrical power is not available or to
satisfy safety requirements.
The Series J bleed-type switch is
intended for general purpose
applications.
Series K units are specially
designed to provide non-bleed
operation with a high degree of
vibration resistance.
Dry contact
Pneumatic
AVAILABLE SWITCH ENCLOSURES
Electric switches – non hazardous area = IP 65/NEMA 4X weather resistant.
Electric switches – hazardous area
= CENELEC - BASEEFA (IP 66)/NEMA 7/9 (IP 65) explosion proof.
Pneumatic switches
= NEMA 3R (IP 53) weather resistant.
Consult the factory for drain/heater options.
All housings are standard available with anti corrosive coating.
IP 65 NEMA 4X enclosure
NEMA 7/9 enclosure
BASEEFA enclosure
EXPEDITE SHIP PLAN (ESP)
Magnetrol has implemented a quick delivery programme ‘ESP’, for the most popular units and options.
The colour coded selections represent those that benefit from the shortest lead times.
CENELEC enclosure
SELECTION DATA
A complete B73 switch, consists of 1 order code:
MATERIALS OF CONSTRUCTION
1
2
4
Carbon steel cage with 316 SST float and 400 SST magnetic sleeve.
Carbon steel cage with 316 SST float, magnetic sleeve with 316 SST jacket.
316 SST cage and trim and float.
SIZE AND TYPE OF PROCESS CONNECTION
B
B
2 0
3 0
1" NPT threaded connection upper side/bottom
1" NPT socket weld connection upper side/bottom
N30
S30
NW 25 DIN FORM C (DIN 2526)
ND 16 (DIN 2533) ND 25 (DIN 2534)
▼ FLANGE TYPE & SIZE
▼ MOUNTING STYLE
▼
1" ANSI type
150 lbs
300 lbs
N40
1FA
1GA
flanged connection upper side/bottom
S40
1FB
1GB
flanged connection side/side
Switch mechanism and enclosure, refer to table below for pneumatic switch mechanisms and for
electric switch mechanisms.
complete order code for B73 liquid float level switch
B 7 3
SELECT PNEUMATIC SWITCH MECHANISM & ENCLOSURE
Pneumatic switch
Max. supply pressure
Max. liquid temperature
Bleed orifice Ø
bar (PSIG)
°C (°F)
mm (inches)
mat'l. code 1
mat'l. code 2, 4
description
Series J bleed type
Series K non bleed type
Code (NEMA 3R encl.)
6.9 bar (100 PSIG)
200°C (400°F)
1.60 mm (0.063")
JDG
JDE
4.1 bar (160 PSIG)
200°C (400°F)
2.39 mm (0.094")
JEG
JEE
4.1 bar (160 PSIG)
230°C (450°F)
1.40 mm (0.055")
JFG
JFE
6.9 bar (100 PSIG)
200°C (400°F)
—
—
KOE
2.8 bar (140 PSIG)
200°C (400°F)
—
KOG
—
SELECT ELECTRIC SWITCH MECHANISM & ENCLOSURE ➁
All models with material of construction code 1
Switch
Description
Series A –
Max.
process
temp.
°C (°F)
③
Cont.
one
per
encl.
230°C
NEMA 4X
cast aluminium
NEMA 7/9
cast iron
1"
NPT
M 20
x
1.5
PG 16
1"
NPT
BASEEFA
cast iron
M20
x
1.5
3/4"
NPT
All models with material of construction codes 2 and 4
CENELEC
cast iron
M20
x
1.5
NEMA 4X
cast aluminium
3/4"
NPT
1"
NPT
M 20
x
1.5
PG 16
NEMA 7/9
cast iron
1"
NPT
BASEEFA
cast iron
M20
x
1.5
3/4"
NPT
CENELEC
cast iron
M20
x
1.5
3/4"
NPT
SPDT
AAP
A2P
A3P
AKR
AK8
AU8
AK7
AU7
AAQ
A2Q
A3Q
AKY
AK6
AU6
AK5
AU5
(450°F) DPDT
ADP
A8P
A9P
ANR
AN8
AX8
AD7
AW7
ADQ
A8Q
A9Q
ANY
AN6
AX6
AD5
AW5
Series B –
120°C
SPDT
BAP
B2P
B3P
BKR
BK8
BU8
BK7
BU7
BAQ
B2Q
B3Q
BKY
BK6
BU6
BK5
BU5
Snap switch
(250°F) DPDT
BDP
B8P
B9P
BNR
BN8
BX8
BD7
BW7
BDQ
B8Q
B9Q
BNY
BN6
BX6
BD5
BW5
Mercury switch
Series C –
230°C
SPDT
CAP
C2P
C3P
CKR
CK8
CU8
CK7
CU7
CAQ
C2Q
C3Q
CKY
CK6
CU6
CK5
CU5
Snap switch
(450°F) DPDT
CDP
C8P
C9P
CNR
CN8
CX8
CD7
CW7
CDQ
C8Q
C9Q
CNY
CN6
CX6
CD5
CW5
Series D –
Snap switch
for DC
current appl.
120°C
(250°F)
SPDT
–
–
–
–
–
–
–
–
DAQ
D2Q
D3Q
DKY
DK6
DU6
DK5
DU5
DPDT
–
–
–
–
–
–
–
–
DDQ
D8Q
D9Q
DNY
DN6
DX6
DD5
DW5
Series E –
Vibration
resistant
mercury switch
230°C
(450°F)
SPDT
EAP
E2P
E3P
EKR
EK8
EU8
EK7
EU7
EAQ
E2Q
E3Q
EKY
EK6
EU6
EK5
EU5
DPDT
EDP
E8P
E9P
ENR
EN8
EX8
ED7
EW7
EDQ
E8Q
E9Q
ENY
EN6
EX6
ED5
EW5
Series F –
Snap switch
hermetically
sealed
230°C
(450°F)
SPDT
DPDT
FAP
FDP
F2P
F8P
F3P
F9P
FKR
FNR
FK8
FN8
FU8
FX8
FK7
FD7
FU7
FW7
FAQ
FDQ
F2Q
F8Q
F3Q
F9Q
FKY
FNY
FK6
FN6
FU6
FX6
FK5
FD5
FU5
FW5
Series HS –
Snap switch
hermetically
sealed with
terminal block
230°C
(450°F)
SPDT
–
–
–
–
–
–
–
–
HM2
H7A
H6A
HS3
HB1
HB2
HB3
HB4
DPDT
–
–
–
–
–
–
–
–
HM6
H7C
H6C
HS7
HB5
HB6
HB7
HB8
➁
Series U –
120°C
SPDT
UAP
U2P
U3P
UKR
UK8
UU8
UK7
UU7
UAQ
U2Q
U3Q
UKY
UK6
UU6
UK5
UU5
Snap switch
(250°F) DPDT
UDP
U8P
U9P
UNR
UN8
UX8
UD7
UW7
UDQ
U8Q
U9Q
UNY
UN6
UX6
UD5
UW5
Series W –
Snap switch
hermetically
sealed
230°C
(450°F)
SPDT
WAP
W2P
W3P
WKR
WK8
WU8
WK7
WU7
WAQ
W2Q
W3Q
WKY
WK6
WU6
WK5
WU5
DPDT
–
–
–
–
–
–
–
–
WDQ
W8Q
W9Q
WNY
WN6
WX6
WD5
WW5
Series X –
Snap switch
hermetically
sealed
230°C
(450°F)
SPDT
XAP
X2P
X3P
XKR
XK8
XU8
XK7
XU7
XAQ
X2Q
X3Q
XKY
XK6
XU6
XK5
XU5
DPDT
–
–
–
–
–
–
–
–
XDQ
X8Q
X9Q
XNY
XN6
XX6
XD5
XW5
Housing heater and drain available in option. Consult factory for proper
model numbers.
③
Max. Process temperatures are based on 38°C (100°F) ambient
temperature.
OUTLINE DIMENSIONS IN mm (inches)
Housing
max D ➃
A
B
Entry C
IP 65 (NEMA 4x)
151 (5.93)
109 (4.29)
1" NPT, M20 x 1.5 or PG16 (2 entries - 1 plugged)
459 (18.07)
NEMA 7/9 (IP 65)
143 (5.63)
100 (3.94)
1" NPT - 1 entry
453 (17.83)
CENELEC/BASEEFA (IP 66)
143 (5.63)
110 (4.33)
3/4" NPT OR M20 x 1.5 - 2 entries
507 (19.80)
NEMA 3R (IP 53) Pneumatic K
118 (4.64)
130 (5.12)
1/4" NPT - 2 entries
423 (16.65)
NEMA 3R Pneumatic J
118 (4.64)
110 (4.33)
1/4" NPT - 1 entry
423 (16.65)
➃ Allow ± 3 (0.12) tollerances on dimensions and allows 203 (8.00) overhead clearance for cover removal
ACTUATING LEVEL DIMENSIONS VS.
SPECIFIC GRAVITY – mm (inches)
Dimensions
Specific gravity
0.60
0.80
1.00
1.20
HL
30 (1.22)
43 (1.69)
49 (1.93)
54 (2.13)
LL
53 (2.10)
60 (2.36)
65 (2.56)
68 (2.68)
A
A
A
B
B
B
C
C
C
C
C
D
D
HL
LL
159 ± 2 (6.26 ± 0.08)
for material code 1 & 2
163 ± 2 (6.42 ± 0.08)
for material code 4
D
250 ± 2
(9.84 ± 0.08)
250 ± 2
(9.84 ± 0.08)
83 ± 2
(3.27 ± 0.08)
160 ± 2
(6.30 ± 0.08)
160 ± 2
(6.30 ± 0.08)
Threaded & Socket weld
Flanged
Flanged
upper side/bottom
upper side/bottom
side/side
QUALITY ASSURANCE - ISO 9001
THE QUALITY ASSURANCE SYSTEM IN PLACE AT MAGNETROL GUARANTEES THE HIGHEST LEVEL OF QUALITY DURING THE DESIGN,
THE CONSTRUCTION AND THE SERVICE OF CONTROLS.
OUR QUALITY ASSURANCE SYSTEM IS APPROVED AND CERTIFIED TO ISO 9001 AND OUR TOTAL COMPANY IS COMMITTED TO
PROVIDING FULL CUSTOMER SATISFACTION BOTH IN QUALITY PRODUCTS AND QUALITY SERVICE.
PRODUCT WARRANTY
ALL MAGNETROL MECHANICAL LEVEL CONTROLS ARE WARRANTED FREE OF DEFECTS IN MATERIALS AND 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 INTERNATIONAL 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 THE EQUIPMENT. THERE ARE NO OTHER WARRANTIES EXPRESSED OR IMPLIED, EXCEPT, SPECIAL WRITTEN WARRANTIES COVERING SOME
MAGNETROL PRODUCTS.
UNDER RESERVE OF MODIFICATIONS
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ITALIA
UNITED
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INDIA
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Tel. (02204) 9536-0
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11, Rue A. Einstein, Espace Descartes, 77420 Champs-sur-Marne
adresse postale: 77436 Marne-la-Vallée Cédex 2
Tel. (0) 164.68.58.28
Fax. (0) 164.68.58.27
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BULLETIN N°:
EFFECTIVE:
SUPERSEDES:
OUR NEAREST REPRESENTATIVE
BE 46-119.6
JANUARY 1996
November 1992