Tuffy® II Liquid Level Controls with Electric Switches DESCRIPTION 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 bulletin covers Tuffy II level controls with electric switches. For Tuffy with a pneumatic switch, see bulletin 44-109. TECHNOLOGY 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 non-magnetic 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. FEATURES • Pressure ratings to 2625 psi (181 bar) APPLICATIONS • Sour service (NACE) • High/low alarm • Single pump control • Day storage tanks • Corrosive processes (Hastelloy® C wetted parts) • Cost-effective clad flange design option • Process vessels • NACE, ASME B31.1 and ASME B31.3 construction • Boiler low water cut-off • Specific gravity as low as 0.40 • SIL 2 suitable (FMEDA report available upon request) • Interface level

ADDITIONAL FEATURES • Carbon steel with 316 SS, all 316 SS or all Hastelloy C wetted components • Fixed narrow differential models • Enlarged switch enclosure for wiring ease • Wide selection of process connections: 2" NPT 3" to 6" ANSI flanges ANSI flanges pressure classes from 150# to 1500# • 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 • Adjustable wide differential...

DIMENSIONAL SPECIFICATIONS INCHES (MM) 8.29* (211) * This dimension applies to cast iron housing. Subtract 0.31" (8 mm) for aluminum housing. Inches (mm) Dimension B C D E F G Maximum Nozzle Length

DIMENSIONAL SPECIFICATIONS INCHES (MM) Adjustable Differential Unit (T3C) * This dimension applies to cast iron housing. Subtract 0.31" (8 mm) for aluminum housing. Tuffy® Chamber 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) Figure 1 Maximum nozzle length Adjustment Plate Stop Position Stem Length Stop Position Actuation Levels (Inches (± 0.25) at minimum S.G.)

AGENCY APPROVALS AGENCY APPROVED MODEL PROTECTION METHOD AREA CLASSIFICATION Explosion Proof Class I, Div 1; Groups B, C, D Class II, Div 1; Groups E, F, G Class III, Type 4X IP66 Flame Proof Flame Proof Certificate BKI19ATEX0015X, IP66 applied standards EN IEC 60079-0:2018 EN60079-1:2014 and EN60079-26:2015 Certificate KIWA 18ATEX0022X applied standards EN60079-0:2012+ A11:2013, EN60079-11:2012 Certificate BKI13.0006 applied standards IEC60079-0:2011, IEC 60079-1:2007, IEC 60079-26:2006 Certificate IECEx KIWA 18.0011X applied standards IEC 60079-0:2011 and IEC 60079-11:2011 2014/30/EU Per Horizontal...

MODEL NUMBER STANDARD NARROW DIFFERENTIAL BASIC MODEL NUMBER T3 Tuffy II Electric Liquid Level Switch FUNCTION/FLOAT Compatible Model Codes ➀ Max. Pressure psig (bar) Process Connection Size Codes Process Connection Type Codes Process Connection Material/Design Codes Level Differential PROCESS CONNECTION SIZE 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 PROCESS CONNECTION TYPE ➀ Type NPT ANSI RF ANSI RF ANSI RF ANSI RF ANSI RF Flange, Flange,...

MODEL NUMBER STANDARD NARROW DIFFERENTIAL (continued) PROCESS CONNECTION MATERIAL/DESIGN CODE ASME B31.1, ASME B31.3 & NACE Process Connection Material Carbon Steel Flange and cladding Not applicable with 316/316L Stainless Steel float Carbon Steel Flange with N 316/316L SS process wetted face Compatible Model Codes Process Process Function/ Connection Connection Float Codes Size Codes Type Codes 1, 2, 4, 5 Carbon Steel Flange with Hastelloy C process wetted face SWITCH TYPE Electric Switch Rating VAC VDC Maximum Process Temperature ➀➁ Cast Iron Cast Alum. Housing Housing Contact Type and Material...

MODEL NUMBER INTERFACE 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) ➀ 0.81 0.1 1.72" BASIC MODEL NUMBER T3 Tuffy II Electric Liquid Level Switch 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 ANSI ANSI ANSI ANSI PROCESS CONNECTION TYPE ➀ A B ANSI RF Flange, 150# ANSI RF Flange,...

MODEL NUMBER INTERFACE (continued) PROCESS CONNECTION MATERIAL/DESIGN CODE ASME B31.1, ASME B31.3 NACE & NACE Process Connection Material Carbon Steel Flange and cladding with Not Not applicable applicable 316/316L SS float Carbon Steel Flange with J N 316/316L SS process wetted face K P All 316/316L Stainless Steel SWITCH TYPE Electric Switch Rating VAC VDC Code 0 1 2 3 4 6 7 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 High-temp HS...