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 Via Arese 12, I-20159 Milano Tel. (02) 607.22.98 (R.A.) • Fax. (02) 668.66.52 • E-Mail: [email protected] UNITED KINGDOM Unit 1 Regent Business Centre, Jubilee Road Burgess Hill West Sussex RH 15 9TL Tel. (01444) 871313 • Fax (01444) 871317 • E-Mail: [email protected] INDIA B4/115 Safdurjung Enclave, New Delhi 110 029 Tel. 91 (11) 6186211 • Fax 91 (11) 6186418 • E-Mail: [email protected] www.magnetrol.com BENELUX OUR NEAREST REPRESENTATIVE BE 46-117.6 MARCH 2002 January 1996