MAGNETROL T20-1B2A-BKP

Top Mounting
T20 and T21
Liquid Level Switches
DESCRIPTION
T20 and T21 units are simple, reliable float switches,
designed for top mounting into tanks or vessels. T20
units utilize a single switch mechanism and float. T21
tandem units utilize two switch mechanisms and two
separate floats. T20 and T21 models are available for
any type of open or closed vessel, with either threaded
or flanged type mounting, and actuating depths of up to
48 inches (1219 mm).
FEATURES
• Float diameters of 3" × 5", 4" and 41⁄2" available
• Tank connections available in 1" NPT, cast iron,
forged, or stainless steel flanges
• Choice of switch mechanism:
Dry contact
Hermetically sealed
Pneumatic
• Choice of switch enclosure:
NEMA 1 carbon steel for pneumatics
TYPE 4X/7/9 Class I, Div. 1, Groups C & D,
polymer coated aluminum
TYPE 4X/7/9 Class I, Div. 1, Group B,
polymer coated aluminum
OPTIONS
• NACE
• ATEX approved housing
• Housing heater
APPLICATIONS
• Day tanks
• Condensate receivers
• Fuel storage tanks
• Cooling towers
• Flash tanks
• Interface
• High and high/high alarm from single tank entry
• Float guide cage
• Tropicalized switch mechanism
• Special flange face finishes
• Submersible housing
• Elevated temperature
TECHNOLOGY
A permanent magnet is attached to a pivoted
switch actuator and adjustment screw . As the
float rises following the liquid level, it raises the
attraction sleeve into the field of the magnet,
which then snaps against the non-magnetic
enclosing tube , actuating the switch . The
enclosing tube provides a static pressure boundary
between the switch mechanism and the process.
On a falling level, an inconel spring retracts the
magnet, deactivating the switch.
T21
TANDEM
2
5
Pivot
6
4
Return
Spring
1
3
Process Liquid
Process Liquid
Rising Level
Falling Level
MODELS
T21 tandem models combine the functions of two separate narrow differential level controls in a single, compact, easy to install instrument. Two individual switch
mechanisms are employed to provide two actuating
levels at least 8" apart. These instruments are ideally used
in applications requiring two separate switching points,
such as high and low level alarm operation.
Model T21 tandem float switches are available with an
optional cage to help stabilize the floats under turbulent conditions. Consult your local representative for
ordering information.
AGENCY
Optional
guide cage
LOWER
ACTUATING
LEVEL
APPROVALS
AGENCY
MODEL APPROVED
APPROVAL CLASSES
FM
All with an electric switch mechanism and a housing
listed as TYPE 4X/7/9
Class I, Div 1, Groups C & D
Class II, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
listed as TYPE 4X/7/9 Class I, Div 1, Group B
Class I, Div 1, Groups B, C & D
Class II, Div 1, Groups E, F & G
All with a Series F, HS, H1, 8 or 9 electric switch
mechanism and a housing listed as CSA TYPE 4X
Class I, Div 2, Groups B, C & D
All with an electric switch mechanism and a housing
listed as TYPE 4X/7/9
Class I, Div 1, Groups C & D
Class II, Div 1, Groups E, F & G
All with an electric switch mechanism and a housing
listed as TYPE 4X/7/9 Class I, Div 1, Group B
Class I, Div 1, Groups B, C & D
Class II, Div 1, Groups E, F & G
All with an electric switch mechanism and an
ATEX II 2 G EEx d IIC T6
94/9/EC
IEC Ex Ex d IIC T6
IP 66
CSA
ATEX / IEC Ex ATEX housing CE
Low Voltage Directives 2006/95/EC
Per Harmonized Standard:
EN 61010-1/1993 & Amendment No. 1
Dual stage units with ‘HS’ or ‘H1’ switches are not ATEX approved.
2
UPPER
ACTUATING
LEVEL
Installation Category II
Pollution Degree 2
SPECIFICATIONS
SWITCH
MECHANISMS
AND
ENCLOSURES
SERIES B, C, D & R DRY CONTACT
SWITCHES
• Designed for AC and DC
current applications
• Process temperatures to
+1000° F (+538° C)
SERIES HS, H1, 8 & 9
HERMETICALLY SEALED SWITCHES
• Ideal for use in salt and other
corrosive atmospheres
• HS & H1 are positively pressurized capsules for entire mechanism and contacts
• Process temperatures to
+1000° F (+538° C)
SERIES J & K PNEUMATIC
SWITCHES
• Suited for applications where
electrical power is
not available
• Bleed and non-bleed designs
• Process temperatures to +400° F
(+204° C)
SWITCH ENCLOSURES
• TYPE 4X/7/9 aluminum enclosures
• Designed to meet Class I, Div. 1,
Groups C & D and Class I, Div. 1
Group B
• Optional housing heaters and drains
available for some enclosures
• Pneumatic switch mechanisms available with a NEMA 1 enclosure
BASIC ELECTRICAL RATINGS
Voltage
120 VAC
240 VAC
24 VDC
120 VDC
240 VDC
Switch Series and Non-Inductive Ampere Rating
D
F
HS
H1
R
8
B
C
15.00
15.00
6.00
0.50
0.25
15.00
15.00
10.00
1.00
0.50
10.00
—
10.00
10.00
3.00
0.25
—
4.00
0.30
—
DIMENSIONAL
INCHES
5.00
5.00
5.00
0.50
0.25
1.00
1.00
1.00
0.40
—
1.00
1.00
1.00
0.40
—
9
1.00
—
3.00
—
—
—
—
0.50
—
—
SPECIFICATIONS
(mm)
Housing TYPE 4X/7/9 Group B
B
B
A
6.25*
(158)
8.46
(214)
NEMA 1 Pneumatics
B
6.25*
(158)
1.81 (45) Ref.
1" NPT
8" min.
Distance
to lower
actuating
level
Actuating
level
Model T21 with flange
Conduit Connections
1" NPT dual entry
4.70 (119)
5.00 (127)
1
⁄4" NPT single entry
7.94*
(201)
Distance to
actuating level
(4" min.)
Distance To
Maximum
Upper level
40" (1016)
Minimum
4" (102)
Lower level
48" (1219)
12" (305)
A
2.44
(61)
Actuating
level
B
3.87 (98)
All housings rotatable 360°.
Pneumatic switches available with Series T20 units only.
A
10.12
(257)
Distance to
upper actuating
level (4" min.)
A
5.93 (151)
7.94*
(201)
1.81 (45) Ref
NOTE: On Model T21 the lower float
actuates upper switch mechanism. The upper float actuates
the lower switch mechanism.
Actuating
level
Model T20 with 1" NPT
Distance to
actuating level
(4" min)
Actuating
level
Model T20 with flange
* These dimensions increase by 2.19 (55)
when unit is supplied with an HS switch
with terminal block.
3
MODEL
T20
NUMBER
SINGLE
SWITCH
Models available for quick shipment, usually within one week after factory
receipt of a complete purchase order, through the Expedite Ship Plan (ESP)
IMPORTANT: Actuating level(s), in either the rising or falling state, and specific
gravity must be provided upon placement of order.
MODEL NUMBER CODE AND MATERIALS OF CONSTRUCTION
Model No.
T20-1
T20-4
Set Points
Tank Connection
Carbon steel
316 SS
1—Single float
Float and Trim
300 Series SS
316 SS
Sleeve
400 Series SS
316 SS
IMPORTANT: The maximum available insertion depth is governed by the liquid specific gravity and
selected float size as given in the table below. The minimum insertion depth is four inches.
MAXIMUM INSERTION LENGTH inches (mm) FLOAT PRESSURE RATINGS
Liquid
Specific
Gravity
1.00
0.90
0.80
0.70
0.60
3.00 x 5.00
(76 x 127)
39 (991)
20 (508)
—
—
—
Float Size
4.00
(102)
48 (1219)
33 (838)
11 (279)
—
—
4.50
(114)
48 (1219)
48 (1219)
48 (1219)
38 (965)
6 (152)
Float Size
Inches (mm)
3.00 x 5.00
(76 x 127)
4.00
(102)
4.50
(114)
100° F
(38° C)
500
(34)
600
(41)
500
(34)
Pressure Rating PSIG (bar)
750° F
900° F
1000° F
(399° C)
(482° C)
(538° C)
377
(26)
483
(33)
403
(28)
353
(24)
465
(32)
388
(27)
335
(23)
459
(32)
383
(26)
TANK CONNECTION AND FLOAT SIZE
Tank Connection 1" NPT
4" 125 lb. C.I. flange 4" 150 lb. F.S. flange
5" 125 lb. C.I. flange 5" 150 lb. F.S. flange
6" 125 lb. C.I. flange 6" 150 lb. F.S. flange
6" 300 lb. F.S. flange
3.00 x 5.00 (76 x 127)
B2A
H2A
H3A
J2A
J3A
K2A
K3A
—
Float Diameter
4.00 (102)
B2B
—
—
J2B
J3B
K2B
K3B
—
4.50 (114)
B2C
—
—
J2C
J3C
K2C
K3C
K4C Flanges are ANSI standard threaded onto 1" NPT bushing. Forged steel flanges
have standard raised face.
Not available with Model T20-4.
Available only in cast iron.
Available with material option code 1 only. C/F for stainless steel construction.
Process temperature based on +100° F (+38° C) ambient.
Uncontrolled housing heater or drain available in TYPE 4X/7/9 enclosure.
Consult factory for TYPE 4X/7/9 cast iron housings.
On steam applications, temperature down-rated to +400° F (+204° C) process
at +100° F (+38° C) ambient.
CSA approval does not apply to Series HE switches.
4
ELECTRIC SWITCH MECHANISM AND ENCLOSURE
Switch
Description
Series B
Snap Switch
Series C
Snap Switch
Series D DC Current
Snap Switch
T20-1 Models
T20-4 Models
Process TYPE
4X/7/9
Aluminum
Enclosure
Temperature
Set
Contacts
Range
ATEX
ATEX
Points
Class I, Div 1 Class I, Div 1
Class I, Div 1 Class I, Div 1
Ex II 2 G EEx
Ex II 2 G EEx
°F (°C)
Groups C&D
Group B
Groups C&D
Group B
d IIC T6
d IIC T6
SPDT
1
BKP
BKT
BAC
BKQ
BKS
BA9
-40 to +250
(-40 to +121)
DPDT
1
BNP
BNT
BBC
BNQ
BNS
BB9
SPDT
1
CKP
CKT
CAC
CKQ
CKS
CA9
-40 to +450
(-40 to +232)
DPDT
1
CNP
CNT
CBC
CNQ
CNS
CB9
SPDT
1
DKQ
BKS
DA9
-40 to +250
N/A
(-40 to +121)
DPDT
1
DNQ
DNS
DB9
Series F
Hermetically Sealed
Snap Switch
-50 to +750
(-46 to +399)
Series HS
Hermetically Sealed
5-amp Snap Switch
with Wiring Leads
-50 to +550 (-46 to +288)
Series HS
Hermetically Sealed
5-amp Snap Switch
with Terminal Block
-50 to +550 (-46 to +288)
Series H1
Hermetically Sealed
1-amp Snap Switch
with Wiring Leads
-50 to +750
(-46 to +399)
Series R
High Temperature
Snap Switch
-40 to +750
(-40 to +399)
Series 8
Hermetically Sealed
Snap Switch
-50 to +750
(-46 to +399)
Series 9
High Temperature
Hermetically Sealed
Snap Switch
-50 to +750
(-46 to +399)
Switch
Description
SPDT
1
FKP
FKT
FAC
FKQ
FSS
FA9
DPDT
1
FNP
FNT
FBC
FNQ
FNS
FB9
SPDT
1
HMC
HEK HMC
HEK HET N/A
HMF
DPDT
1
HMF
HET N/A
SPDT
1
HM3
HM4
HA9
HM3
HM4
HA9
DPDT
1
HM7
HM8
HB9
HM7
HM8
HB9
SPDT
1
HKC
SPDT
1
RKQ
RKS
RA9
RKQ
RKS
RA9
DPDT
1
RNQ
RNS
RB9
RNQ
RNS
RB9
SPDT
1
8KP
8KT
8AC
8KQ
8KS
8A9
DPDT
1
8NP
8NT
8BC
8NQ
8NS
8B9
SPDT
1
9KP
9KT
9AC
9KQ
9KS
9A9
DPDT
1
9NP
9NT
9BC
9NQ
9NS
9B9
N/A
HKC
N/A
Process Cast Iron
Cast Iron
CS/Aluminum
CS/Aluminum
Set
Temp. Range Contacts
Class I, Div 1 Class I, Div 1
Class I, Div 1 Class I, Div 1
Points
NEMA 4X
NEMA 4X
°F (°C)
Groups C&D
Group B
Groups C&D
Group B
Series R
High Temperature
Snap Switch
-40 to +1000
(-40 to +538)
Series 9
High Temperature
Hermetically Sealed
Snap Switch
-50 to +1000
(-46 to +538)
SPDT
1
R1Y
RKY
RKW
R1Y
RKY
RKW
DPDT
1
RDY
RNY
RNW
RDY
RNY
RNW
SPDT
1
9AR
9KR
9KV
9AY
9KY
9KW
DPDT
1
9DR
9NR
9NV
9DY
9NY
9NW
PNEUMATIC SWITCH MECHANISM AND ENCLOSURE
Switch
Description
Series J
Bleed Type
Series K
Non-Bleed
Maximum
Maximum
Supply
Process
Pressure Temperature
100 psig
(7 bar)
400° F
(204° C)
60 psig
(4 bar)
100 psig
700° F
(7 bar)
(371° C)
100 psig
(7 bar)
400° F
(204° C)
40 psig
(3 bar)
Bleed Orifice NEMA 1
Diameter
.063
(1.6 mm)
.094
(2.4 mm)
.055
(1.4 mm)
JDE
JEE
JFE
—
KOE
—
KOG
5
MODEL
T21
NUMBER
TANDEM
SWITCH
IMPORTANT: Actuating level(s), in either the rising or falling state, and specific
gravity must be provided upon placement of order.
MODEL NUMBER CODE AND MATERIALS OF CONSTRUCTION
Model No.
T21-1
T21-4
Set Points
Tank Connection
Carbon steel
316 SS
2—Tandem float
Float and Trim
300 Series SS
316 SS
Sleeve
400 Series SS
316 SS
IMPORTANT: The maximum available insertion depth is governed by the liquid specific gravity and
selected float size as given in the table below. The minimum insertion depth is four inches.
The minimum distance between the top and bottom insertion depths is eight inches.
MAXIMUM INSERTION LENGTH inches (mm) FLOAT PRESSURE RATINGS
Float Size
Liquid
3.00 x 5.00
4.00
(76 x 127)
(102)
Specific
Gravity Upper Lower Upper Lower
21
48
32
48
1.00
(533) (1219) (813) (1219)
9
30
18
44
0.90
(229) (762) (457) (1118)
4
21
0.80
—
—
(102) (533)
0.70
—
—
—
—
Float Size
Inches (mm)
4.50
(114)
Upper Lower
40
48
(1016) (1219)
40
48
(1016) (1219)
40
48
(1016) (1219)
21
48
(533) (1219)
3.00 x 5.00
(76 x 127)
4.00
(102)
4.50
(114)
100° F
(38° C)
Pressure Rating PSIG (bar)
750° F
900° F
1000° F
(399° C)
(482° C)
(538° C)
500
(34)
600
(41)
500
(34)
377
(26)
483
(33)
403
(28)
353
(24)
465
(32)
388
(27)
335
(23)
459
(32)
383
(26)
TANK CONNECTION AND FLOAT SIZE
Tank Connection 4" 125 lb. C.I. flange 4" 150 lb. F.S. flange
5" 125 lb. C.I. flange 5" 150 lb. F.S. flange
6" 125 lb. C.I. flange 6" 150 lb. F.S. flange
6" 300 lb. F.S. flange
3.00 x 5.00 (76 x 127)
H2A
H3A
J2A
J3A
K2A
K3A
—
Float Diameter
4.00 (102)
—
—
J2B
J3B
K2B
K3B
—
4.50 (114)
—
—
J2C
J3C
K2C
K3C
K4C
Flanges are ANSI standard. Forged steel flanges have standard raised face.
Not available with -4 Materials of Construction.
Available only in cast iron.
Process temperature based on +100° F (+38° C) ambient.
Uncontrolled housing heater or drain available in TYPE 4X/7/9 enclosure.
Consult factory for TYPE 4X/7/9 cast iron housings.
On steam applications, temperature down-rated to +400° F (+204° C) process
at +100° F (+38° C) ambient.
6
ELECTRIC SWITCH MECHANISM AND ENCLOSURE
Switch
Description
Series B
Snap Switch
Series C
Snap Switch
Series D DC Current
Snap Switch
T21-1 Models
T21-4 Models
Process TYPE
4X/7/9
Aluminum
Enclosure
Temperature
Set
Contacts
Range
ATEX
ATEX
Points
Class I, Div 1 Class I, Div 1
Class I, Div 1 Class I, Div 1
Ex II 2 G EEx
Ex II 2 G EEx
°F (°C)
Groups C&D
Group B
Groups C&D
Group B
d IIC T6
d IIC T6
SPDT
2
BLA
BLJ
BDC
BLB
BLK
BD9
-40 to +250
(-40 to +121)
DPDT
2
BOA
BOJ
BGC
BOB
BOK
BG9
SPDT
2
CLA
CLJ
CDC
CLB
CLK
CD9
-40 to +450
(-40 to +232)
DPDT
2
COA
COJ
CGC
COB
COK
CG9
SPDT
2
DLB
DLK
DD9
DLB
DLK
DD9
-40 to +250
(-40 to +121)
DPDT
2
DOB
DOK
DG9
DOB
DOK
DG9
Series F
Hermetically Sealed
Snap Switch
-50 to +750
(-46 to +399)
Series HS
Hermetically Sealed
5-amp Snap Switch
with Wiring Leads
-50 to +550 (-46 to +288)
Series H1
Hermetically Sealed
1-amp Snap Switch
with Wiring Leads
-50 to +750
(-46 to +399)
Series R
High Temperature
Snap Switch
-40 to +750
(-40 to +399)
Series 8
Hermetically Sealed
Snap Switch
-50 to +750
(-46 to +399)
Series 9
High Temperature
Hermetically Sealed
Snap Switch
-50 to +750
(-46 to +399)
Switch
Description
SPDT
2
FLA
FLJ
FDC
FLB
FLK
FD9
DPDT
2
FOA
FOJ
FGC
FOB
FOK
FG9
SPDT
2
HMN
HMP
HMN
HMP
HMY
HMZ
N/A
N/A
DPDT
2
HMY
HMZ
SPDT
2
HKN
HKP
N/A
HKN
HKP
N/A
SPDT
2
RLB
RLK
RD9
RLB
RLK
RD9
DPDT
2
ROB
ROK
RG9
ROB
ROK
RG9
SPDT
2
8LA
8LJ
8DC
8LB
8LK
8D9
DPDT
2
8OA
8OJ
8GC
8OB
8OK
8G9
SPDT
2
9LA
9LJ
9DC
9LB
9LK
9D9
DPDT
2
9OA
9OJ
9GC
9OB
9OK
9G9
Process Cast Iron
Cast Iron
CS/Aluminum
CS/Aluminum
Set
Temp. Range Contacts
Class
I,
Div
1
Class
I,
Div
1
Class
I,
Div
1 Class I, Div 1
Points
NEMA 4X
NEMA 4X
°F (°C)
Groups C&D
Group B
Groups C&D
Group B
Series R
High Temperature
Snap Switch
-40 to +1000
(-40 to +538)
Series 9
High Temperature
Hermetically Sealed
Snap Switch
-50 to +1000
(-46 to +538)
SPDT
2
R3M
RLM
RLW
R3M
RLM
RLW
DPDT
2
REM
ROM
ROW
REM
ROM
ROW
SPDT
2
9BD
9LD
9LV
9BM
9LM
9LW
DPDT
2
9ED
9OD
9OV
9EM
9OM
9OW
7
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.
Several Liquid Level Switches are available
for quick shipment, usually within one week
after factory receipt of a complete purchase
order, through the Expedite Ship Plan (ESP).
ESP service may not apply to orders of ten units
or more. Contact your local representative for
lead times on larger volume orders, as well as
other products and options.
ESP
Expedite
Ship
Plan
To take advantage of ESP, match the color
coded model number codes in the selection
charts (standard dimensions apply).
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
145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306
Heikensstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Fax 052 45.09.93
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.
Magnetrol & Magnetrol logotype are registered trademarks of Magnetrol International.
BULLETIN: 44-117.21
EFFECTIVE: May 2010
SUPERSEDES : September 2009