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Summary of Contents for Magnetrol Tuffy II T31
- Page 1 Tuffy ® Liquid Level Controls with Electric Switches Installation and Operating Manual Side Mounted Float Level Switch...
- Page 2 Cautions are also MAGNETROL will repair or replace the control at no cost used to alert the technician to unsafe practices or the to the purchaser (or owner) other than transportation.
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Page 3: Table Of Contents
Tuffy II Liquid Level Controls ® with Electric Switches Table of Contents 1.0 Installation 2.4 Preventive Maintenance........12 1.1 Unpacking.............4 2.4.1 What to Do ..........12 1.2 Before You Begin ...........4 2.4.2 What to Avoid ..........13 1.2.1 Site Preparation ..........4 2.4.3 Switch Mechanism Replacement....13 1.2.2 Equipment and Tools........4 2.5 Agency Approvals ..........14 1.3 Mounting ..............5... -
Page 4: Installation
Installation This section provides detailed procedures for properly installing the Tuffy II Liquid Level Switch. ® Caution: If equipment is used in a manner not specified by manufacturer, protection provided by equipment may be impaired. Unpacking Unpack the instrument carefully. Inspect all units for damage. Report any concealed damage to the carrier within 24 hours. -
Page 5: Mounting
Mounting The TUFFY II Liquid Level Switch is available with a 2" NPT mounting bushing, a variety of flange mountings and external cages for mounting outside of the vessel. Caution: This instrument is intended for use in Installation Category II, Pollution Degree 2. - Page 6 Figure 5 Figure 6 Terminal Connections Terminal Connections DPDT Dry Contact switch DPDT Dry Contact switch with silver contacts with gold contacts Figure 7 Figure 8 Terminal Connections Terminal Connections SPDT HS switch SPDT Dry Contact switch with silver or gold contacts with silver or gold contacts 44-607 Tuffy ®...
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Page 7: Wiring
3. Use pipe of sufficient size and strength to support the control. Provide a hanger or stand to help support the weight of the cage if necessary. 4. All piping should be straight and free of low spots or pockets. Lower liquid line should drain toward vessel and upper line toward control. -
Page 8: Adjustable Differential
NOTE: For ATEX Flameproof Installations, the cable entry device must be certified in type protection flameproof enclosure “d”, suitable for the conditions of use and currently installed. For ambient temperatures above +55° C, suitable heat resistant cables must be used. 3. -
Page 9: Interface
Once the desired stop positions are determined, remove the cotter pins holding the stops in the adjusting plate holes. Move each stop to the desired location on the adjusting plate and replace the cotter pins. Ensure that the float stem is positioned between the two stops. -
Page 10: Theory Of Operation
Theory of Operation 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. The float along with the float magnet moves as the liquid Float Magnet level changes. - Page 11 5. If the switch mechanism does move freely, use an electrical continuity checker to determine if the switch is electrically Figures 5, 6, 7 functional. Refer to & on page 6 for the appropriate wiring diagram. If the switch operates properly when moved mechanically but not when electrically activat- ed, the switch must be replaced.
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Page 12: Preventive Maintenance
Preventive Maintenance Periodic inspections are a necessary means to keep your level control in good working order. This control is a safety device that protects the valuable equipment it serves. A systematic program of preventive maintenance should be implemented when the control is placed into service. If the following instructions are observed, your control will provide reliable protection of your equipment for many years. -
Page 13: What To Avoid
2.4.2 What to Avoid 1. NEVER leave the switch housing cover off of the control longer than is necessary to make routine inspections. 2. NEVER place a jumper wire across terminals to “cut-out” the control. If a jumper is necessary for test purposes, ensure that it is removed before placing the control into service. -
Page 14: Agency Approvals
gency pprovals AGENCy APPROvED MODEL PROTECTION METHOD AREA CLASSIFICATION Class I, Div 1; Groups B, C, D T3X-XXXX-XXA Explosion Proof Class II, Div 1; Groups E, F, G T3X-XXXX-XXB Class III, Type 4X IP66 Class I, Div 1; Groups B, C, D T3X-XXXX-XXC Explosion Proof Class II, Div 1;... -
Page 15: Specifications
Specifications 2.7.1 Functional Output Type Switch closure, SPDT or DPDT Ratings Up to 10 amps @ 120 or 240 VAC, 50–60 Hz Up to 6 amps @ 24 VDC Up to 0.6 amps @ 120 VDC Contacts Silver, gold plated, hermetically sealed silver, hermetically sealed gold plated Housing Material... -
Page 16: Switch Temperature Ratings
2.7.3 Switch Temperature Ratings 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°... - Page 17 2.7.3 Switch Temperature Ratings (continued) 44-607 Tuffy ® II Liquid Level Switch...
- Page 18 2.7.3 Switch Temperature Ratings (continued) 44-607 Tuffy ® II Liquid Level Switch...
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Page 19: Physical
2.7.4 Physical Dimensional Specifications – inches (mm) 8.29* (211) 3.29 (84) 4.39 (112) 2" NPT ¾" NPT 2" NPT Narrow Differential Unit (T31, T35) 8.23* (209) 3.35 (85) 4.39 (112) ¾" NPT Flanged Narrow Differential Unit (T31, T32, T33, T34, T35) 8.23* (209) 3.35... - Page 20 2.7.4 Physical (continued) Dimensional Specifications – inches (mm) 8.23* (209) 3.35 (85) 4.39 (112) ¾" NPT Adjustable Differential Unit (T3C) (See model number on page 26 for dimension B) 1.31 (2) 1" NPT (33) 4.50 (114) Dia. 2" NPT 1.31 6.40 (33) (163)
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Page 21: Model Numbers
2.8 Model Numbers Narrow Differential: Switch differential of approximately 0.5" (1.7" on interface unit), for actuation of an alarm or system shutdown. Interface Service: Switch to detect the interface between two liquids with SGUs that differ by at least 0.1. Single Liquid: Switch to detect the top of layer of a single liquid with no other liquid above it. -
Page 22: Standard Narrow Differential Models
2.8 Model Numbers 2.8.1 Standard Narrow Differential Models BASIC MODEL NUMBER TUFFY II Electric Liquid Level Switch FUNCTION/FLOAT Compatible Model Codes ➀ Max. Process Process Process Connection Level Pressure Connection Connection Material/Design Code Differential psig (bar) Size Codes Type Codes Codes 0.40 750 (52) -
Page 23: Chamber Model Number
2.8 Model Numbers 2.8.1 Standard Narrow Differential Models (continued) PROCESS CONNECTION MATERIAL/DESIGN CODE Compatible Model Codes ASME B31.1 ASME B31.1, Process Process & ASME B31.3 Function/ Connection Connection Standard ASME B31.3 NACE & NACE Process Connection Material Float Codes Size Codes Type Codes Carbon Steel Flange and cladding 1, 2, 4, 5 3, 4, 5, 6... -
Page 24: Interface Models
2.8 Model Numbers 2.8.3 Interface Models Process Connection: ANSI Flanges Wetted Materials: Carbon steel and/or 316/316L SS 750 psi (52 bar) ➀ Max. Float Pressure: Min. SG of Lower Liquid: 0.81 Min SG difference: Level Differential: 1.72" (HL=0.82" LL=1.06") BASIC MODEL NUMBER TUFFY II Electric Liquid Level Switch FUNCTION/FLOAT Interface Level... - Page 25 2.8 Model Numbers 2.8.3 Interface Models (continued) PROCESS CONNECTION MATERIAL/DESIGN CODE ASME B31.1 ASME B31.1, & ASME B31.3 Standard ASME B31.3 NACE & NACE 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...
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Page 26: Adjustable Wide Differential Models
2.8 Model Numbers 2.8.4 Adjustable Wide Differential Models Process Connection: ANSI Flanges Wetted Materials: Carbon steel and/or 316/316L SS 750 psi (51 bar) ➀ Max. Float Pressure: Min SG: 0.78 Level Differential: Adjustable from 1.36" to 18.26" BASIC MODEL NUMBER TUFFY II Electric Liquid Level Switch FUNCTION/FLOAT Adjustable Differential Level... - Page 27 2.8 Model Numbers 2.8.4 Adjustable Wide Differential Models (continued) PROCESS CONNECTION MATERIAL/DESIGN CODE ASME B31.1 ASME B31.1, & ASME B31.3 Standard ASME B31.3 NACE & NACE 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...
- Page 28 Performance specifications are effective with date of issue and are subject to change without notice. BULLETIN: 44-607.13 Magnetrol & Magnetrol logotype and Tuffy are registered trademarks of Magnetrol International, Incorporated. EFFECTIvE: January 2016 Teflon is a registered trademark of DuPont.
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