C24, C25, Boiler and Water Column Liquid Level Switches DESCRIPTION C24, C25, Boiler and Water Column Liquid Level Switches are single or multi-switch units that offer versatility and reliable operation in a variety of applications. Available with up to three switch mechanisms for level alarm, control, and shutdown functions, the boiler and water column controls are designed for use in steam boiler applications while the Models C24 & C25 are for general industrial use. FEATURES • Easy inspection of float chamber through removable head • Cast iron or fabricated steel float chambers • 316 and 316L stainless steel floats • Brass chamber liner standard in B24, B25, W24, and W25 models • Right or left hand water column mounting • Try cock tappings and sight glass tappings available • Process temperature to +1000° F (+538° C) • Multiple switch capability • Working steam pressure to 600 pounds APPLICATIONS • Choice of switch mechanisms: Pneumatic Hermetically sealed Dry contact • Flash tank high level alarm • Choice of switch mechanism enclosures: • Water tube boiler low water cutoff • Condensate receiver control NEMA 1 carbon steel for pneumatic • Boiler steam chest high level alarm TYPE 4X/7/9 Class I, Div. 1, Groups C & D, polymer coated aluminum • Boiler feedwater pump control • Day tanks TYPE 4X/7/9 Class I, Div. 1, Group B, polymer coated aluminum • Optional high temperature insulation available. See bulletin 41-106. • Boiler low water cutoff • Holding tanks 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. 2 5 Pivot 6 4 Return Spring 1 3 Process Liquid Process Liquid Rising Level MOUNTING WATER COLUMN LEVEL SWITCHES The right- and left-hand mounting arrangement refers to the position of the try cock tappings in relation to the gauge glass connections. Model W24—Right-hand mounting Model W25—Right-hand mounting Model W29—Left-hand mounting To determine whether the control mounting is right- or left-hand, position the control with the gauge glass connections facing you. If the try cock tappings are to the right, it is a right-hand control, if they are to the left, it is a left-hand control. Refer to illustrations below. Left hand control 2 Model W60—Left-hand mounting Right hand control Falling Level SPECIFICATIONS SWITCH MECHANISMS AND ENCLOSURES SERIES B, C & D DRY CONTACT SWITCHES SERIES F, HS, H1, 8 & 9 HERMETICALLY SEALED SWITCHES • Dry contact for applications where mercury must be avoided • Ideal for use in salt and other corrosive atmospheres • Designs for AC and DC current applications • Positively pressurized capsules for entire mechanism and contacts • Process temperatures to +450° F (+232° C) • Process temperatures to +1000° F (+538° C) SERIES J & K PNEUMATIC SWITCHES SWITCH ENCLOSURES • Suited for applications where electrical power is not available • TYPE 4X/7/9 aluminum enclosures • Designed to meet Class I, Div. 1, Groups C & D and Class I, Div. 1 Group B • Bleed and non-bleed designs • Process temperatures to +400° F (+204° C) • Optional housing heaters and drains available for some enclosures • Pneumatic switch mechanisms available with a NEMA 1 enclosure BASIC ELECTRICAL RATINGS Voltage Switch Series and Non-Inductive Ampere Rating B C D F HS H1 R 120 VAC 240 VAC 24 VDC 120 VDC 240 VDC 15.00 15.00 6.00 0.50 0.25 1.00 1.00 1.00 0.40 — 15.00 15.00 10.00 1.00 0.50 10.00 — 10.00 10.00 3.00 2.50 — 4.00 0.30 — 5.00 5.00 5.00 0.50 0.25 1.00 1.00 1.00 0.40 — 8 1.00 — 3.00 — — 9 — — 0.50 — — 3 AGENCY APPROVALS AGENCY APPROVED MODEL 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 HS, H1, F, 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 housing ATEX II 2 G EEx d IIC T6 94/9/EC IEC Ex Ex d IIC T6 IP 66 Low Voltage Directives 2006/95/EC Per Harmonized Standard: EN 61010-1/1993 & Amendment No. 1 Installation Category II Pollution Degree 2 CSA ATEX / IEC Ex CE Dual stage units with “HS” or “H1” switches are not ATEX approved. IEC Installation Instructions: The cable entry and closing devices shall be Ex d certified suitable for the conditions of use and correctly installed. For ambient temperatures above +55° C or for process temperatures above +150° C, suitable heat resistant cables shall be used. Heat extensions (between process connection and housing) shall never be insulated. Special conditions for safe use: When the equipment is installed in process temperatures higher than +85° C the temperature classification must be reduced according to the following table as per IEC60079-0. Maximum Process Temperature Temperature Classification < 85° C T6 < 100° C T5 < 135° C T4 < 200° C T3 < 300° C T2 < 450° C T1 These units are in conformity with IECEx KEM 05.0020X Classification Ex d IIC T6 Tambient -40° C to +70° C 4 DIMENSIONAL INCHES SPECIFICATIONS (mm) N P P N N P Q Q M plugged M M M plugged R HL LL Q M Drum connections K Gauge glass L tappings K K LL HL A R A HL Low water cutoff point K I T Try cock tappings I A G C M plugged R LL K C Models B24, C24 B S J Models B25, C25 Allow 10.00 (254) overhead clearance for cover removal. L K E D Conduit Connections M B ACTUATION LEVELS * Min. S.G. HL LL S C Model Models W24, W25, W29, W60 B24/C24 Electrical Switches: TYPE 4X/7/9: 1" NPT Group B: 1" NPT Pneumatic Switches: 1 NEMA 1: ⁄4" NPT B25/C25 W24 W25 All housings rotatable 360° W29 W60 B24/C24 B25/C25 W24 W25 W29 W60 A 5.56 (141) 7.00 (177) 16.00 (405) 13.50 (343) 15.00 (381) 15.00 (381) 1.56 (40) 4.50 (114) 12.25 (311) 10.25 (260) 11.88 (302) 11.06 (281) LL 0.94 (24) 4.13 (105) 11.88 (302) 9.88 (251) 11.50 (292) 11.19 (284) 1.69 (42) 4.88 (124) 12.63 (321) 10.63 (270) 12.25 (311) 11.69 (297) * Single switch mechanism only. Consult factory for multiple switches. Levels are ±0.25" (6 mm) DIMENSIONS Model 0.69 (18) 3.69 (94) 11.38 (289) 9.44 (240) 11.00 (279) 10.50 (267) 1.0 HL B n/a 2.00 (51) 3.00 (76) 2.00 (51) 4.50 (114) 4.19 (106) C 2.81 (71) 2.63 (66) 2.63 (66) 2.63 (66) 2.83 (71) 3.61 (91) D E G I J n/a n/a n/a n/a n/a n/a n/a n/a n/a n/a 3.06 (77) 3.06 (77) 2.88 (73) 3.66 (92) 3.50 (88) 2.00 (51) 4.50 (114) 4.19 (106) 15.00 (381) 13.50 (343) 15.00 (381) 15.00 (381) 3.50 (88) 3.00 (76) 3.50 (88) 3.50 (88) 4.00 (101) 3.00 (76) 4.00 (101) 4.00 (101) K 1" NPT 1" NPT 11⁄4" NPT 1" NPT 11⁄4" NPT 11⁄4" NPT L n/a n/a ⁄4" NPT 1 ⁄2" NPT 3 ⁄4" NPT 3 ⁄4" NPT 3 N P Q R 5.93 (150) 5.93 (150) 5.93 (150) 5.93 (150) 5.93 (150) 5.93 (150) 3.78 (96) 3.78 (96) 3.78 (96) 3.78 (96) 3.78 (96) 3.78 (96) 6.25 (158) 8.46 (214) 8.46 (214) 8.46 (214) 8.46 (214) 8.46 (214) 16.25 (412) 22.12 (561) 33.50 (850) 28.62 (726) 33.50 (850) 34.37 (872) S T n/a n/a 11⁄4" NPT 3 ⁄4" NPT 11⁄4" NPT 3 ⁄4" NPT 3 ⁄4" NPT n/a 3 ⁄4" NPT 1 ⁄2" NPT 3 ⁄4" NPT 3 ⁄4" NPT 5 MODEL NUMBER Models available for quick shipment, usually within one week after factory receipt of a complete purchase order, through the Expedite Ship Plan (ESP) MODEL NUMBER CODE, MATERIALS OF CONSTRUCTION AND TANK CONNECTION Model Code B24-1B10 C24-1B10 B25-1B10 C25-1B10 Minimum S.G. Chamber Material Attraction Sleeve 0.85 Cast Iron 0.84 C25-2B10 W24-1B10 0.84 Cast Iron W25-1B10 0.84 Cast Iron W29-1B10 0.84 W60-1B10 0.75 Fabricated Steel Float Material Trim Material Max. WSP Rating Max. Pressure @ 100° F (38° C) 316L SS 316 SS 250 psi @ 406° F (17 bar @ 207° C) 400 psi (28 bar) 400 Series SS Try Cock Mounting N/A 316 SS 400 Series SS Right Hand 400 Series SS 316L SS 316 SS 300 psi @ 422° F (21 bar @ 217° C) 500 psi (34 bar) 600 psi @ 489° F (41 bar @ 254° C) 900 psi (62 bar) Left Hand ELECTRIC SWITCH MECHANISM AND ENCLOSURE (Additional models on next page) Switch Description Max. Process Temp ° F (° C) Series B Snap Switch 250 (121) Series C Snap Switch 450 (232) Series F Hermetically Sealed Snap Switch 750 (399) B24 & C24 only Contacts Set Points TYPE 4X/7/9 Aluminum Enclosure Class I, Div. 1, Groups C & D Class I, Div. 1, Group B SPDT 1 BKP BKT DPDT 1 BNP BNT SPDT 1 CKP CKT DPDT 1 CNP CNT SPDT 1 FKP FKT DPDT 1 FNP FNT PNEUMATIC SWITCH MECHANISM AND ENCLOSURE Switch Description Series J Bleed Type Series K Non-Bleed Type Maximum Supply Pressure psig bar 100 60 100 40 7 4 7 3 Maximum Process Temp. °F °C 400 400 400 400 204 204 204 204 Bleed Orifice Diameter Inches mm .063 .094 — — 1.6 2.3 — — All except B24, C24 NEMA 1 Code B24, C24 NEMA 1 JDE JEE KOE KOG — JEG — KOG Cast iron models limited to maximum service temperature of +406° F (+207° C) or switch mechanism temperature rating if lower. Models B24, B25, W24, and W25 include brass inner liners. Models C24 & C25 are intended for non-boiler service as they do not contain a chamber liner. Process temperature based on +100° F (+38° C) ambient Consult factory for manual reset switches. 6 ELECTRIC SWITCH MECHANISM AND ENCLOSURE Switch Description Series B Snap Switch Series C Snap Switch Series D DC Current Snap Switch Series F Hermetically Sealed Snap Switch Series HS Hermetically Sealed 5-amp Snap Switch with Wiring Leads All models except Model C25-2B10 only B24, C24 and C25-2B10 Process Temperature Set TYPE 4X/7/9 Aluminum Enclosure Contacts Range Points ATEX ATEX Class I, Div 1 Class I, Div 1 Class I, Div 1 Class I, Div 1 °F (°C) Ex II 2 G EEx Ex II 2 G EEx Groups C&D Group B Groups C&D Group B d IIC T6 d IIC T6 1 BKA BKJ BCC BKB BKK BC9 SPDT 2 BLA BLJ BDC BLB BLK BD9 -40 to +250 3 BMA BMJ BEC BMB BMK BE9 (-40 to +121) 1 BNA BNJ BFC BNB BNK BF9 DPDT 2 BOA BOJ BGC BOB BOK BG9 1 CKA CKJ CCC CKB CKK CC9 SPDT 2 CLA CLJ CDC CLB CLK CD9 -40 to +450 3 CMA CMJ CEC CMB CMK CE9 (-40 to +232) 1 CNA CNJ CFC CNB CNK CF9 DPDT 2 COA COJ CGC COB COK CG9 1 DKB DKK DC9 SPDT 2 DLB DLK DD9 -40 to +250 3 N/A DMB DMK DE9 (-40 to +121) 1 DNB DNK DF9 DPDT 2 DOB DOK DG9 1 FKA FKJ FCC FKB FKK FC9 SPDT 2 FLA FLJ FDC FLB FLK FD9 -50 to +750 (-46 to +399) 1 FNA FNJ FFC FNB FNK FF9 DPDT 2 FOA FOJ FGC FOB FOK FG9 1 HMJ HMK SPDT 2 HMN HMP -50 to +550 N/A N/A (-46 to +288) 1 HMS HMT DPDT 2 HMY HMZ 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 Series R High Temperature Snap Switch Series 9 High Temperature Hermetically Sealed Snap Switch SPDT 1 HM3 HM4 HA9 HM7 HM8 HB9 HKJ HKK HKN HKP RKB RLB RNB ROB 8KB 8LB 8MB 8NB 8OB 9KB 9LB 9MB 9NB 9OB RKK RLK RNK ROK 8KK 8LK 8MK 8NK 8OK 9KK 9LK 9MK 9NK 9OK N/A DPDT 1 SPDT 1 N/A DPDT SPDT DPDT SPDT DPDT SPDT DPDT N/A 2 1 2 1 2 1 2 3 1 2 1 2 3 1 2 N/A 8KA 8LA 8MA 8NA 8OA 9KA 9LA 9MA 9NA 9OA 8KJ 8LJ 8MJ 8NJ 8OJ 9KJ 9LJ 9MJ 9NJ 9OJ 8CC 8DC 8EC 8FC 8GC 9CC 9DC 9EC 9FC 9GC RC9 RD9 RF9 RG9 8C9 8D9 8E9 8F9 8G9 9C9 9D9 9E9 9F9 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 1 R1M RKM RKW SPDT 2 R3M RLM RLW -40 to +1000 N/A (-40 to +538) 1 RDM RNM RNW DPDT 2 REM ROM ROW 1 9AD 9KD 9KV 9AM 9KM 9KW SPDT 2 9BD 9LD 9LV 9BM 9LM 9LW -50 to +1000 3 9CD 9MD 9MV 9CM 9MM 9MW (-46 to +538) 1 9DD 9ND 9NV 9DM 9NM 9NW 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 Magnetrol quality assurance system is registered to ISO 9001 affirming its commitment to the company. Magnetrol is committed to providing full customer satisfaction both in quality products known international quality standards providing the strongest assurance of product/service and quality service. quality available. Several 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: 46-118.17 EFFECTIVE: August 2010 SUPERSEDES: July 2008