B24 & C24 - Magnetrol International

B24 & C24
®
Liquid Float Level Switches
DESCRIPTION
Standard cast iron cages
Magnetrol's series 24 liquid level switches are single switch
mechanism units available for level alarm or shut down
applications. The B24 is designed for service in steam
boilers up to 250 lbs WSP. The C24 is designed for general
industrial use.
F E AT U R E S
• Cast iron float cage
• Process temperature up to 200 °C (400 °F)
• Removable sensing unit from cage allows easy maintenance
• Single switch level
• Specific gravity as low as 0,85
• Process pressure up to 27,6 bar (400 psi)
• Standard anti corrosive protection
• Materials of construction:
- cage: cast iron
- float and trim: 316 (1.4401)
- magnetic sleeve: 400 series SST
A P P L I C AT I O N S
A G E N C Y A P P R O VA L S
• Boilers
Agency
Approval
• Flash tanks
ATEX
II 2G EEx d II C T6, explosion proof
II 1G EEx ia II C T6, intrinsically safe
• Holding tanks
CENELEC
CCE ➀
EEx d II C T6, explosion proof
FM
Class I, Div. 1, Groups C & D
Class II, Div. 1, Groups E, F & G, Type NEMA 7/9
Non-Hazardous area
• Condensate receivers
• Day tanks
• Dump valve controls
FM/CSA ➁
R1 (1) 136/MI/433, explosion proof
Explosion proof area –
Groups B, C, D, E, F & G Type NEMA 4X/7/9
Model
B24
C24
Pressure
bar (psi)
Temperature
°C (°F)
Min. specific
gravity
17,2 (250)
27,6 (400)
200 (400)
40 (100)
0,85
SAA ➁
LRS
Explosion proof area
Lloyds Register of Shipment (marine applications)
GOST/
GOSGORTECHNADZOR ➁
Russian Authorisation Standards
Other approvals are available, consult factory for more details
➀ For CCE approved units, use the ATEX explosion proof model
numbers.
➁ Consult factory for proper model numbers.
Worldwide level and flow solutions
AVA I L A B L E S W I T C H M E C H A N I S M S
Type of switch module ➀
Max. Process Temp. ➁
Switch ratings – A res. ➂
Code
24 V DC 240 V AC 120 V AC
Micro switch
max 120 °C (250 °F)
6
15
15
B
Micro switch
max 200 °C (400 °F)
10
15
15
C
Micro switch with gold alloy contacts
max 120 °C (250 °F)
1
–
1
U
Hermetically sealed micro switch with silver plated contacts
max 200 °C (400 °F)
3
1
1
W
Hermetically sealed micro switch with gold plated contacts
max 200 °C (400 °F)
0,5
0,5
0,5
X
Proximity switch - type SJ 3.5 SN
max 100 °C (210 °F)
NA
NA
NA
V
Mercury switch
max 200 °C (400 °F)
10
6,5
13
A
Pneumatic bleed type (open air)
max 200 °C (400 °F)
NA
NA
NA
J
Pneumatic non bleed type (closed circuit)
max 200 °C (400 °F)
NA
NA
NA
K
➀ For applications with heavy vibration, consult factory for suited switch modules.
➁ Max process temperature is specified at 40 °C (100 °F) ambient temperature and for non condensing applications.
➂ For more details - see bulletin BE 42-120.
Type B, C & U
Type W & X
Type A
Type J & K
Type V
AVA I L A B L E H O U S I N G S
•
•
•
•
•
For Non Ex use
IP 66
Die cast Aluminium
2 Entries (one plugged)
Standard blue
anti corrosive coating
• Housing heater/drain
available, consult factory
2
•
•
•
•
•
For Exd/Exi use
IP 66
Die cast Aluminium
2 Entries (one plugged)
Standard blue
anti corrosive coating
• ATEX II 2G EEx d II C T6
• ATEX II 1G EEx ia II C T6
•
•
•
•
For Exd use
IP 66
Cast Iron
One entry (2 entries at
request)
• Standard blue
anti corrosive coating
• CENELEC EEx d II C T6
•
•
•
•
For pneumatic switches
IP 53 (NEMA 3R)
IP 55 optional at request
Alu base / cold rolled steel
cover
• Standard blue
anti corrosive coating
•
•
•
•
•
For Exd use
IP 66 (NEMA 7/9)
Die cast Aluminium
2 Entries (one plugged)
Standard blue
anti corrosive coating
• FM, Class I, Div. 1,
Groups C & D
• FM, Class II, Div. 1,
Groups E, F & G
P R I N C I P L E O F O P E R AT I O N
A permanent magnet A is attached to a pivoted switch B .
As the float C rises following the liquid level, it raises the
magnet attractor D into the field of the magnet, which in
turn snaps against the non-magnetic barrier tube E , tilting the
switch. The barrier tube provides a static seal between the
switch mechanism and the float, eliminating the need for a
flexing bellows seal, packing gland or other failure prone
sealing elements.
When the liquid level falls, the float draws the magnet
attractor below the magnetic field. The magnet swings out
and tilts the switch to the reverse position causing low level
switch actuation A .
B
pivot
E
return spring
A
D
C
rising level
falling level
EXPEDITE SHIP PLAN (ESP)
Several mechanical switches are available for quick shipment, within max. 3 weeks after factory receipt of purchase order,
through the Expedite Ship Plan (ESP).
Models covered by ESP service are conveniently grey coded in the selection data charts.
To take advantage of ESP, simply match the grey coded model number codes (standard dimensions apply).
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.
S E L E C T I O N D ATA
A complete liquid level switch, consists of 1 order code:
BASIC MODEL NUMBER
B 2 4 Float switch for steam boiler applications with self-cleaning brass liner
C 2 4 Float switch for general industrial applications
SWITCH MECHANISM & ENCLOSURE (refer to tables below)
2 4
order code for series B24 & C24
A B 1 0
Select electric switch mechanism & enclosure (see page 2 for switch ratings)
qty and
switch
type
A
B
C
U
V
W
X
1 x SPDT
1 x DPDT
1 x SPDT
1 x DPDT
1 x SPDT
1 x DPDT
1 x SPDT
1 x DPDT
1 x SPDT
1 x DPDT
1 x SPDT
1 x DPDT
Weather proof
(IP 66)
cast Aluminium
M20 x 1,5
1" NPT
A2P
AAP
A8P
ADP
B2P
BAP
B8P
BDP
C2P
CAP
C8P
CDP
U2P
UAP
U8P
UDP
W2P
WAP
X2P
XAP
-
All models with material code A
ATEX (IP 66)
II 2G EEx d IIC T6
II 1G EEx ia II C T6
cast Aluminium
cast Aluminium
M20 x 1,5
1" NPT
M20 x 1,5
1" NPT
AHC
AAC
AJC
ABC
BHC
BAC
BJC
BBC
CHC
CAC
C2L
CAL
CJC
CBC
C8L
CDL
UHC
UAC
U2L
UAL
UJC
UBC
U8L
UDL
VFS
VHS
WHC
WAC
W2L
WAL
XHC
XAC
X2L
XAL
-
CENELEC (IP 66)
EEx d IIC T6
cast Iron
M20 x 1,5
3/4" NPT
AK7
AU7
AD7
AW7
BK7
BU7
BD7
BW7
CK7
CU7
CD7
CW7
UK7
UU7
UD7
UW7
WK7
WU7
XK7
XU7
-
FM (IP 66)
NEMA 7/9
cast Alu.
1" NPT
AKP
ANP
BKP
BNP
CKP
CNP
UKP
UNP
WKP
XKP
-
Select pneumatic switch mechanism & enclosure
Pneumatic switch type
Series J (open air)
Series K (closed circuit)
Max supply pressure
bar (psi)
4,1 (60)
2,8 (40)
Max liquid temperature
°C (°F)
200 (400)
200 (400)
Bleed orifice Ø
mm (inches)
2,39 (0.094)
–
NEMA 3R (IP 53)
JEG
KOG
3
DIMENSIONS IN mm (inches)
Y
X
V
Z
W
Standard threaded
1" NPT-F tank connection
ACTUATING LEVELS IN mm (inches)
FOR DIFFERENT SPECIFIC GRAVITIES
HL
211
(8.31)
LL
141
(5.56)
S.G.
0,85
0,90
0,95
1,00
1,05
1,10
High Level (HL)
18
(0.71)
20
(0.79)
22
(0.87)
24
(0.94)
25
(0.98)
27
(1.06)
Low Level (LL)
40
(1.57)
41
(1.61)
42
(1.65)
43
(1.69)
44
(1.73)
45
(1.77)
71
(2.81)
Standard threaded
1" NPT-F tank connection
V
Housing type
W
øX
Y
mm
inches
mm
inches
mm
inches
mm
inches
Weatherproof FM (NEMA 7/9) ATEX (Cast Alu)
202
7.94
42
1.66
151
5.93
109
4.29
CENELEC (Cast Iron)
249
9.80
45
1.77
143
5.63
Pneumatics
Switch Module J
Pneumatics
Switch Module K
165
6.50
39
1.54
118
4.65
Z
M20 x 1,5 (*) or 1" NPT
(2 entries - 1 plugged)
(*) not for FM (NEMA 7/9)
110
4.33
110
4.33
130
5.12
M20 x 1,5 or 3/4" NPT
(single entry - 2 entries at request)
1/4" NPT
Allow 200 mm (7.87") overhead clearance / All housings are 360 ° rotatable
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.
BULLETIN N°:
EFFECTIVE:
SUPERSEDES:
UNDER RESERVE OF MODIFICATIONS
Heikensstraat 6, 9240 Zele, België
Tel. +32 (0)52.45.11.11 • Fax. +32 (0)52.45.09.93 • E-Mail: [email protected]
DEUTSCHLAND
Schloßstraße 76, D-51429 Bergisch Gladbach-Bensberg
Tel. 02204 / 9536-0 • Fax. 02204 / 9536-53 • E-Mail: [email protected]
FRANCE
Le Vinci 6 - Parc d’activités de Mitry Compans, 1, rue Becquerel, 77290 Mitry Mory
Tél. 01.60.93.99.50 • Fax. 01.60.93.99.51 • E-Mail: [email protected]
ITALIA
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Tel. (02) 607.22.98 (R.A.) • Fax. (02) 668.66.52 • E-Mail: [email protected]
UNITED
KINGDOM
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Tel. (01444) 871313 • Fax (01444) 871317 • E-Mail: [email protected]
INDIA
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www.magnetrol.com
BENELUX
OUR NEAREST REPRESENTATIVE
BE 46-117.6
MARCH 2002
January 1996