Tuffy II® Liquid Level Controls with Electric Switches D E S C R I P T I O N The Tuffy® II Liquid Level Switches are float-actuated devices designed for horizontal mounting in a tank or vessel through threaded or flanged pipe connections. The compact size allows for installation in small vessels, while its many features provide a variety of application uses. The single switch mechanism is available in SPDT or DPDT forms on units designed for fixed or adjustable, narrow or wide differential and interface service levels. This sales literature covers Tuffy II level switches that have electric switches. For Tuffy with a pneumatic switch, see bulletin 44-109. T E C H N O L O G Y The Tuffy II achieves switching action through the use of a magnetic switch mechanism and a magnet attached to the float assembly. Separating the two magnets is a nonmagnetic pressure barrier. As the liquid level changes, the float, and therefore the float magnet, moves. The float and switch magnets repel each other causing movement of the switch magnet assembly, tripping the switch and making or breaking an electrical circuit. A P P L I C A T I O N S • Sour service (NACE) • High/low alarm • Single pump control F E A T U R E S • Day storage tanks • Pressure ratings to 2625 psi (181 bar) • Corrosive processes (Hastelloy® C wetted parts) • Process temperatures to +750° F (+399° C) • Process vessels • Cost-effective clad flange design option • Boiler low water cut-off • NACE and/or ASME B31.3 construction • Interface level • Specific gravity as low as 0.40 • Explosion proof installations A D D I T I O N A L F E A T U R E S • Carbon steel with 316 SS, all 316 SS or all Hastelloy C wetted components • Enlarged switch enclosure for wiring ease • Explosion proof NEMA 4X/7/9 enclosure • All models available with FM, CSA and ATEX approvals • Choice of cast aluminum or cast iron switch enclosure • Interface service with 0.10 minimum specific gravity difference • External cages available in carbon steel and 316 stainless steel P H Y S I C A L • Fixed narrow differential models • Adjustable wide differential models • Wide selection of process connections: 2" NPT 3" to 6" ANSI flanges ANSI flanges pressure classes from 150# to 900# • Wide selection of switches: SPDT or DPDT Silver or gold contacts Dry contact Hermetically sealed S P E C I F I C A T I O N S Measured Variable: Liquid level Deadband: Narrow differential = 0.50" Wide differential = up to 18.26" Interface service differential 1.72" Float & Trim Parts: 316 stainless steel or Hastelloy C Flange Materials: Carbon steel, 316 stainless steel, 316 stainless steel clad carbon steel Hastelloy C, or Hastelloy C clad carbon steel Process Connections: 2" NPT, 3" to 6" ANSI flanges in 150# to 900# pressure classes Process Temp Range*: Cast Iron Housing Cast Aluminum Housing HS with silver contacts -65° to +750° F (-54° to +399° C) -65° to +650° F (-54° to +343° C) HS with gold contacts -65° to +750° F (-54° to +399° C) -65° to +650° F (-54° to +343° C) Snap with silver contacts -40° to +750° F (-40° to +399° C) -40° to +650° F (-40° to +343° C) Snap with gold contacts -40° to +375° F (-40° to +190° C) -40° to +325° F (-40° to +162° C) Ambient Temp. Range* 0° to +100° F (-18° to +38° C) Maximum Process Pressure: 2630 psig (181 bar) * For ambient temperatures outside of the listed range, consult factory or bulletin 44-607 for maximum allowable process temperature. E L E C T R I C A L S P E C I F I C A T I O N S Signal Output: Switch closure Type of Contacts: SPDT or DPDT Contact Material: Silver or gold Type of Switches: Dry contact or Hermetically sealed Switch Ratings: Up to 10 amps @ 120/240 VAC Up to 6 amps @ 24 VDC 2 Enclosure Rating: NEMA 4X/7/9, Class I, Div 1, Groups B, C & D, IP66 Enclosure Material: Cast aluminum or cast iron Cable Entry: 3 ⁄4" NPT D I M E N S I O N A L I N C H E S S P E C I F I C A T I O N S ( M M ) 8.29* (211) C 3.29 (84) 4.39 (112) D F G 2" NPT ¾" NPT 2" NPT Narrow Differential Unit (T31, T35) 8.23* (209) E 3.35 (85) 4.39 (112) D F G ¾" NPT Flanged Narrow Differential Unit (T31, T32, T33, T34, T35) 8.23* (209) E 3.35 (85) 4.39 (112) D F ¾" NPT * This dimension applies to cast iron housing. Subtract 0.31" for aluminum housing. G Interface Unit (T3B) Inches (mm) Dimension B C D E F G Maximum Nozzle Length T31 — 8.66 (220) 3.59 (91) 8.72 (221) 2.00 (51) 5.25 (133) 3.29 (84) T32 T33 T34 — — — — — — 3.36 (85) 8.02 (204) 2.00 (51) 4.55 (116) 3.35 (85) 3.58 (91) 7.50 (190) 2.38 (60) 4.00 (102) 3.35 (85) 3.59 (91) 7.97 (202) 2.00 (51) 4.50 (114) 3.35 (85) T35 — 7.86 (199) 3.33 (85) 7.92 (201) 2.00 (51) 4.45 (113) 3.29 (84) T3B — 3.75 (95) T3C 7.5 (190) 12.25 (311) — — — — 6.78 (172) 17.62 (448) 2.66 (68) 6.00 (152) 5.80 (147) 13.62 (346) 12.86 (327 18.54 (471) 16.61 (422) 2.66 (68) 6.00 (152) 4.35 (110) 24.76 (629) 21.36 (543) 3 D I M E N S I O N A L I N C H E S S P E C I F I C A T I O N S ( M M ) 8.23* (209) E 3.35 (85) 4.39 (112) D B F 1.31 (33) (2) 1" NPT G 4.50 (114) Dia. Adjustable Differential Unit (T3C) * This dimension applies to cast iron housing. Subtract 0.31" for aluminum housing. 2" NPT 6.40 (163) 1.31 (33) 11.25 ± .12 (286 ± 3) Tuffy Chamber D Tuffy II Maximum Nozzle Lengths (distance from face of mounting flange to end of 3" sch 80 nozzle or the tip of the mounting threads to the end of 2" nozzle with ID same as 2" NPT) C L B K A H E J G T31 or T35 with NPT connection 3.29" T31, T32, T33, T34 or T35 with flanged connection 3.35" T3B 5.80" T3C 4.35" F Figure 1 Maximum nozzle length Adjustment Plate Stop Position Stem Length 3.75 Rising 7.50 12.25 3.75 Falling 7.50 12.25 A +0.16 -0.12 -0.43 +1.51 +1.98 +2.61 Pin Position B C D E F G +1.84 +3.54 +4.87 -1.47 n/a n/a +2.49 +5.14 +7.20 -2.65 n/a n/a +3.36 +7.20 +10.20 -4.12 n/a n/a +3.14 n/a n/a -0.39 -1.87 -3.21 +4.51 n/a n/a -0.99 -3.29 -5.37 +6.28 n/a n/a -1.69 -5.04 -8.06 Stop Position Actuation Levels (Inches (± 0.25) at minimum S.G.) 4 H J K L -1.65 n/a +1.52 +4.10 -2.94 n/a +1.99 +6.01 -4.54 n/a +2.62 +8.46 0.16 -2.44 +3.32 n/a -0.12 -4.16 +4.80 n/a -0.44 -6.31 +6.71 n/a A G E N C Y A P P R O V A L S AGENCY APPROVED MODEL PROTECTION METHOD AREA CLASSIFICATION FM T3X-XXXX-XXA T3X-XXXX-XXB Explosion Proof Class I, Div 1; Groups B, C, D Class II, Div 1; Groups E, F, G Class III, NEMA 4X IP66 CSA T3X-XXXX-XXC T3X-XXXX-XXD Explosion Proof Class I, Div1; Groups B, C, D Class II, Div 1; Groups E, F, G Class III, Div 1; Type 4X ATEX T3X-XXXX-XX1 T3X-XXXX-XX2 T3X-XXXX-XX3 T3X-XXXX-XX4 Flame Proof Intrinsically Safe T3X-XXXX-XXM T3X-XXXX-XXN T3X-XXXX-XXP T3X-XXXX-XXR CE ATEX II 1⁄2 G EEx d II C T6 94/9/EC IP66 ATEX II 1G EEx ia II C T6 IP66 Low Voltage Directives Installation Category II 2006/95/EC Pollution Degree 2 Per Horizontal Standard: EN 61010-1/1993 & Amendment No. 1 T3X-XXXX-XXX Special conditions for safe use: When the equipment is installed, particular precautions must be take to ensure, taking into account the effect of the process temperature, that the ambient temperature of the electrical parts is between -40° and +70° C. When the material is equipped with a aluminum enclosure, all precautions shall be taken to avoid all impacts or frictions which can result in the ignition of the potentially explosive atmosphere. M O D E L Narrow Differential: Interface Service: Single Liquid: Adjustable Differential: B A S I C F L O W N U M B E R S Switch differential of approximately 0.5" (1.7" on interface unit), for actuation of an alarm or system shutdown. Switch to detect the interface between two liquids with SGUs that differ by at least 0.1. Switch to detect the top of layer of a single liquid with no other liquid above it. Wide switch differential from approximately 1.36" to 18.26", which may be adjusted in the field by repositioning pins on the adjustment plate. M O D E L C H A R T T3B Interface Hastelloy C Wetted Parts Narrow Differential Single Liquid T33 0.4 min SG 720 psi T31 0.6 min. SG 1500 psi T35 300# ANSI 0.4 min. SG T31 600# ANSI 0.6 min. SG T35 900# ANSI 0.6 min. SG T32 0.7 min. SG Up to 2625 psi T34 NPT Conn Carbon Steel and/or 316 SS Wetted Parts Flange Conn Wide Differential T3C 5 S T A N D A R D M O D E L N A R R O W D I F F E R E N T I A L N U M B E R Models available for quick shipment, usually within one week after factory receipt of a complete purchase order, through the Expedite Ship Plan (ESP). BASIC MODEL NUMBER T3 Tuffy II Electric Liquid Level Switch FUNCTION/FLOAT Code Level Differential 1 2 3 Narrow (0.5") SGU Min Max. Pressure psig (bar) Compatible Model Codes Process Connection Size Codes Process Connection Type Codes Process Connection Material/Design Codes All N, A, B A,B,E,F,J,K,N,P,1,2 0.40 750 (52) 0.60 2220 (153) 3, 4, 5, 6 A, B, C, D A,B,E,F,J,K,N,P,1,2 0.65 750 (52) 3, 4, 5, 6 A, B C,D,G,H,L,M,R,T 4 0.70 2630 (181) 4 E A,B,E,F,J,K,N,P,1,2 5 0.60 1500 (103) All N, A, B, C A,B,E,F,J,K,N,P,1,2 PROCESS CONNECTION SIZE Code 2 3 4 5 6 Size 2" ANSI 3" ANSI 4" ANSI 5" ANSI 6" Compatible Model Codes Process Process Connection Connection Material/Design Type Codes Codes N B, F, K, P A, B, C, D All A, B, C, D, E All A, B All A, B All Function/Float Codes 1, 5 1, 2, 3, 5 1, 2, 3, 4, 5 1, 2, 3, 5 1, 2, 3, 5 PROCESS CONNECTION TYPE Code N A B C D E Type NPT ANSI RF ANSI RF ANSI RF ANSI RF ANSI RF Flange, Flange, Flange, Flange, Flange, 150# 300# 600# 900# 1500# Compatible Model Codes Function/ Process Process Connection Float Connection Material/Design Codes Size Codes Codes 1, 5 2 B, F, K, P 1, 2, 3, 5 3, 4, 5, 6 All 1, 2, 3, 5 3, 4, 5, 6 All 2, 5 3, 4 A, B,E, F, J, K,N,P,1,2 2 3, 4 A, B,E, F, J, K,N,P,1,2 4 4 A,B,E,F,J,K,N,P,1,2 PROCESS CONNECTION MATERIAL/DESIGN CODE SWITCH TYPE HOUSING MATERIAL/APPROVAL See opposite page Rated pressure limited by maximum Float or Flange pressure, whichever is less. T 6 3 0 0 S T A N D A R D M O D E L N A R R O W D I F F E R E N T I A L c o n t . N U M B E R PROCESS CONNECTION MATERIAL/DESIGN CODE Standard ASME B31.3 NACE 1 2 Not applicable A E J B F K C G L D H M ASME B31.3 & NACE Process Connection Material Carbon Steel Flange and cladding Not applicable with 316/316L SS float holder & trim Carbon Steel Flange with N 316/316L SS process wetted face P All 316/316L Stainless Steel Carbon Steel Flange with R Hastelloy C process wetted face T All Hastelloy C Compatible Model Codes Process Process Function/ Connection Connection Float Codes Size Codes Type Codes 1, 2, 4, 5 3, 4, 5, 6 A, B, C, D, E 1, 2, 4, 5 3, 4, 5, 6 A, B, C, D, E 1, 2, 4, 5 All All 3 3, 4, 5, 6 A, B 3 3, 4, 5, 6 A, B SWITCH TYPE Electric Switch Rating VAC VDC Code 0 1 2 3 4 6 Contact Type and Material SPDT w/silver contacts DPDT (dual SPDT) w/silver contacts SPDT w/gold plated contacts DPDT (dual SPDT) w/gold plated contacts HS SPDT w/silver contacts HS SPDT w/gold plated contacts 120 10.0 10.0 0.1 0.1 1.0 0.5 240 10.0 10.0 — — 1.0 0.5 24 6.0 6.0 0.1 0.1 3.0 0.5 120 0.6 0.6 — — 0.5 0.5 Maximum Process Temperature Cast Iron Cast Alum Housing Housing +750°F (+399°C) +650°F (+343°C) +750°F (+399°C) +650°F (+343°C) +375°F (+190°C) +325°F (+162°C) +375°F (+190°C) +325°F (+162°C) +750°F (+399°C) +650°F (+343°C) +750°F (+399°C) +650°F (+343°C) Maximum process temperature is based on an ambient temperature between 0° and +100° F. If ambient is outside this range, consult factory. See Switch temperature ranges on page 2 for minimum process temperatures HOUSING MATERIAL/APPROVAL FM CSA ATEX EP ATEX IS A C 1 M Cast Aluminum, 3⁄4" NPT Conduit Entry B D 2 N Cast Iron, 3⁄4" NPT Conduit Entry 3 P Cast Aluminum, M20 X 1.5 Conduit Entry 4 R Cast Iron, M20 X 1.5 Conduit Entry N/A C H A M B E R P A R T N U M B E R MATERIALS OF CONSTRUCTION/PRESSURE RATING 0-001 0-002 1-001 1-002 Carbon Steel 316 Stainless Steel Carbon Steel 316 Stainless Steel 2200 2500 1200 1400 psig psig psig psig @ @ @ @ +400° +400° +400° +400° F F F F (152 bar @ +204° C), 1400 psig @ +750° F (97 bar @ +399° C) (172 bar @ +204° C), 2013 psig @ +750° F (139 bar @ +399° C) (83 bar @ +204° C), 780 psig @ +750° F (54 bar @ +399° C) (97 bar @ +204° C), 1127 psig @ +750° F (78 bar @ +399° C) Note: Flanged chambers and process flanges available. Consult factory. Z 3 3 4 7 4 7 I N T E R F A C E M O D E L N U M B E R Process Connection: Wetted Materials: Max. Float Pressure: Min. SG of Lower Liquid: Min SG difference: Level Differential: ANSI Flanges Carbon Steel and/or 316/316L SS 750 psi (52 bar) 0.81 0.1 1.72" BASIC MODEL NUMBER T3 Tuffy II Electric Liquid Level Switch FUNCTION/FLOAT B Interface Level LOWER FLUID SPECIFIC GRAVITY 0.81 0.82 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.90 A B C D E F G H J K 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.00 L M N P R S T U V W Specific Gravity Code Specific Gravity Code PROCESS CONNECTION SIZE 3 4 5 6 ANSI ANSI ANSI ANSI 3" 4" 5" 6" PROCESS CONNECTION TYPE A B ANSI RF Flange, 150# ANSI RF Flange, 300# Rated pressure limited by maximum Float or Flange pressure, whichever is less. PROCESS CONNECTION MATERIAL/DESIGN CODE SWITCH TYPE HOUSING MATERIAL/APPROVAL See opposite page T 8 3 B 0 I N T E R F A C E M O D E L c o n t i n u e d N U M B E R PROCESS CONNECTION MATERIAL/DESIGN CODE ASME B31.3 NACE ASME B31.3 & NACE 1 2 Not applicable Not applicable A E J N B F K P Standard Process Connection Material Carbon Steel Flange and cladding with 316/316L SS float holder & trim Carbon Steel Flange with 316/316L SS process wetted face All 316/316L Stainless Steel SWITCH TYPE Electric Switch Rating VAC VDC Code 0 1 2 3 4 6 Contact Type & Material SPDT w/silver contacts DPDT (dual SPDT) w/silver contacts SPDT w/gold plated contacts DPDT (dual SPDT) w/gold plated contacts HS SPDT w/silver contacts HS SPDT w/gold plated contacts 120 10.0 10.0 0.1 0.1 1.0 0.5 240 10.0 10.0 — — 1.0 0.5 24 6.0 6.0 0.1 0.1 3.0 0.5 120 0.6 0.6 — — 0.5 0.5 Maximum Process Temperature Cast Iron Cast Alum Housing Housing +750°F (+399°C) +650°F (+343°C) +750° F (+399°C) +650°F (+343°C) +375°F (+190°C) +325°F (+162°C) +375°F (+190°C) +325°F (+162°C) +750°F (+399°C) +650°F (+343°C) +750°F (+399°C) +650°F (+343°C) Maximum process temperature is based on an ambient temperature between 0° and +100° F. If ambient is outside this range, consult factory. See Switch temperature ranges on page 2 for minimum process temperatures HOUSING MATERIAL/APPROVAL FM CSA ATEX EP ATEX IS A C 1 M Cast Aluminum, 3⁄4" NPT Conduit Entry B D 2 N Cast Iron, 3⁄4" NPT Conduit Entry 3 P Cast Aluminum, M20 X 1.5 Conduit Entry 4 R Cast Iron, M20 X 1.5 Conduit Entry N/A 9 A D J U S T A B L E M O D E L W I D E D I F F E R E N T I A L N U M B E R Process Connection: Wetted Materials: Max. Float Pressure: Min SG: Level Differential: ANSI Flanges Carbon steel and/or 316/316L SS 750 psi (52 bar) 0.78 Adjustable from 1.36" to 18.26" BASIC MODEL NUMBER T3 Tuffy II Electric Liquid Level Switch FUNCTION/FLOAT C Adjustable Differential Level STEM EXTENSION LENGTH "B" DIMENSION 4 8 C 3.75 inch (95 mm) stem extension 7.50 inch (190 mm) stem extension 12.25 inch (311 mm) stem extension PROCESS CONNECTION SIZE 3 4 5 6 ANSI ANSI ANSI ANSI 3" 4" 5" 6" PROCESS CONNECTION TYPE A B ANSI RF Flange, 150# ANSI RF Flange, 300# Rated pressure limited by maximum Float or Flange pressure, whichever is less. PROCESS CONNECTION MATERIAL/DESIGN CODE SWITCH TYPE HOUSING MATERIAL/APPROVAL See opposite page T 10 3 C 0 A D J U S T A B L E M O D E L W I D E D I F F E R E N T I A L c o n t i n u e d N U M B E R PROCESS CONNECTION MATERIAL/DESIGN CODE ASME B31.3 NACE ASME B31.3 & NACE 1 2 Not applicable Not applicable A E J N B F K P Standard Process Connection Material Carbon Steel Flange and cladding with 316/316L SS float holder & trim Carbon Steel Flange with 316/316L SS process wetted face All 316/316L Stainless Steel SWITCH TYPE Electric Switch Rating VAC VDC Code 0 1 2 3 4 6 Contact Type and Material SPDT w/silver contacts DPDT (dual SPDT) w/silver contacts SPDT w/gold plated contacts DPDT (dual SPDT) w/gold plated contacts HS SPDT w/silver contacts HS SPDT w/gold plated contacts 120 10.0 10.0 0.1 0.1 1.0 0.5 240 10.0 10.0 — — 1.0 0.5 24 6.0 6.0 0.1 0.1 3.0 0.5 120 0.6 0.6 — — 0.5 0.5 Maximum Process Temperature Cast Iron Cast Alum Housing Housing +750°F (+399°C) +650°F (+343°C) +750°F (+399°C) +650°F (+343°C) +375°F (+190°C) +325°F (+162°C) +375°F (+190°C) +325°F (+162°C) +750°F (+399°C) +650°F (+343°C) +750°F (+399°C) +650°F (+343°C) Maximum process temperature is based on an ambient temperature between 0° F and +100° F. If ambient is outside this range, consult factory. See Switch temperature ranges on page 2 for minimum process temperatures HOUSING MATERIAL/APPROVAL FM CSA A C ATEX EP ATEX IS 1 M Cast Aluminum, 3⁄4" NPT Conduit Entry B D 2 N Cast Iron, 3⁄4" NPT Conduit Entry 3 P Cast Aluminum, M20 X 1.5 Conduit Entry 4 R Cast Iron, M20 X 1.5 Conduit Entry N/A STOP POSITION ACTUATION LEVELS (INCHES ± 0.25 AT MINIMUM S.G.) Stem Length 3.75 Rising 7.50 12.25 3.75 Falling 7.50 12.25 A +0.16 -0.12 -0.43 +1.51 +1.98 +2.61 Pin Position B C D E F G +1.84 +3.54 +4.87 -1.47 n/a n/a +2.49 +5.14 +7.20 -2.65 n/a n/a +3.36 +7.20 +10.20 -4.12 n/a n/a +3.14 n/a n/a -0.39 -1.87 -3.21 +4.51 n/a n/a -0.99 -3.29 -5.37 +6.28 n/a n/a -1.69 -5.04 -8.06 H -1.65 -2.94 -4.54 0.16 -0.12 -0.44 J n/a n/a n/a -2.44 -4.16 -6.31 K L +1.52 +4.10 +1.99 +6.01 +2.62 +8.46 +3.32 n/a +4.80 n/a +6.71 n/a 11 Q U A L I T Y 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. Magnetrol’s 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 Tuffy II Float Level Switches are available for quick shipment, usually within one week after factory receipt of a 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. E S P Expedite Ship Plan To take advantage of ESP, match the color coded model number codes in the selection charts (standard dimensions apply). W A R R A N T Y 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 © 2010 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 and Magnetrol logotype are registered trademarks of Magnetrol International. Hastelloy® is a registered trademark of Haynes International, Inc. CSA logotype is a registered trademark of Canadian Standards Association BULLETIN: 44-106.9 EFFECTIVE: May 2010 SUPERSEDES: March 2007