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Table of Contents◗OVERLOAD PROTECTION DEVICES“Air Champ” ®TORQUE LIMITERSNexen's line of Torque Limitersis designed to protect yourequipment by immediatelydisengaging the drive shaft whenexcessive torque occurs:◗ Single position, ball detentdesign assures re-engagement ofthe drive from a complete stop inthe same position every time,providing exact timing of bothcomponentsNexen's Air Pressure Circuitscomplete the package for totaloverall protection:◗ Single Air Pressure circuitallows for remote adjustment ofthe torque setting◗ Dual Air Pressure circuitpermits remote adjustment oftorque while allowing a higherpressure for startup (high inertialoads) and a lower pressure forrunning torque requirementsWhen used with Torque Limiters,Nexen Single or DoubleFlexible Couplings allow:◗ High shaft misalignment◗ Zero backlash◗ Excellent torsional stiffness◗ HOW A TORQUE LIMITER SYSTEM WORKS:1. Install Torque Limiter, Limit Switch and the Air Pressure Control System;2. Set the air pressure for the desired overload torque;3. If an overload occurs, the Torque Limiter interface separates, moving the cylinderto the disengaged position;4. The Limit Switch detects the cylinder movement and interrupts electrical power.Interruption of electrical power de-energizes the 3-way N.C. solenoid valve, whichexhausts air pressure from the Torque Limiter, causing it to disengage.5. When the machinery comes to a complete stop, re-engage the Torque Limiter byjogging the drive, thus allowing machine operation to continue.The following pages detail your Torque Limiter System options. You'll find informationon Air Pressure Control Systems, Torque Limiter designs and Flexible Couplings. Onceyou have determined your total system requirements, order each item separately.◗ AIR PRESSURE CONTROL SYSTEMS:Choose from 2 Air Pressure Control Systems–Single or Dual:The Single Air Pressure System provides basic protection:◗ A constant bleed type Air Regulator is set to an air pressure that will allow themachine to operate, but low enough for Torque Limiter disengagement in theevent of machine overload◗ The Air Regulator also provides a constant bleed to eliminate back pressure in theair line while precisely maintaining pressure within .05 psi.◗ Torque setting can be changed while the machine is running via the Air Regulator.The Dual Air Pressure System provides ultimate protection, allowing higher startuppressure (high inertia load) and lower pressure for running with overload protection:◗ Regulator #1 is set to an air pressure high enough to allow machine startup◗ After a pre-set period of time, the Time Delay Control de-energizes the 3-wayinline mount solenoid valve, allowing only the lower running air pressure tooperate the Torque Limiter◗ Regulator #2 is set to an air pressure that will allow the machine to operate, butlow enough for Torque Limiter disengagement in the event of a machine overload◗ Regulator #2 also provides a constant bleed to eliminate back pressure in the airline during overload◗ SMARTVALVE CONTROLLERThe Nexen SmartValve Controller is a microprocessor based pressurecontroller that is ideally suited for use with Nexen torque limiters, brakesand <strong>clutches</strong>. The SmartValve replaces much of the valves, regulators, airlines and plumbing needed to provide multiple pressures to Nexen’spneumatic products.◗ The SmartValve accepts pressure set points in two ways: analog and digital.A 0-10 analog signal caused the SmartValve to output a proportional 0-80 psig.◗ Four digital inputs allow the SmartValve to output 16 different pressures thatcorrespond to one of the standard or custom pressure tables stored onboard.◗ Another input is used to sense a switch closure that signals the SmartValve toexhaust the air pressure, such as in the case of a torque limiter overload.◗ A solid state relay output provides alarm indication during overload situations.110
Table of Contents◗ AIR PRESSURE CONTROL SYSTEMSControl Systems StyleProductNumber“Air Champ” ®Dual System 801579Consists of: (1) Air Regulator Air Gauge -Constant Bleed Type, 0-100 PSI, 125 NPT(2) Quick Exhaust Valve(2) Tee Fittings, 125 NPTF(1) Air Filter, regular duty, 250 NPT(1) Air Regulator/Gauge, 0-125 PSI, 250 NPT(2) 3-Way Inline Mount Solenoid Valve, N.C.(1) Adjustable Time Delay Control◗ RECOMMENDED AIR LINE CONNECTIONSAIR FILTER“NO. 2” CONSTANTBLEED TYPE AIRREGULATOROVERLOAD PROTECTION DEVICES ◗“NO. 1”REGULATOR/GAUGEN.C. 3-WAY INLINEMOUNT SOLENOIDVALVESHUTTLEVALVETIMER DELAYCONTROLN.C. 3-WAY INLETMOUNT SOLENOIDVALVERESET SWITCH(CUSTOMER SUPPLIED)NEUTRALPROXIMITYSENSORSingle System 801578Consists of: (1) Air Regulator Air Gauge -Constant Bleed Type, 0-100 PSI, 125 NPT(1) 3-Way Inline Mount Solenoid Valve N.C.(1) Quick Exhaust Valve(1) Tee Fitting, 125 NPTFAIR GAUGEAIR LINETORQUE LIMITERQUICK EXHAUST VALVENOTE:Areas colored tan, and italicized tan type and arrows indicate “single air pressuresystem” installation only. “Dual air pressure system” requires all components.GND◗ SMARTVALVE CONTROLLERControl Systems StyleProductNumberSmartValve Controller 964508115/230 VAC Power Supply 964509Specifications:DC Power, 24 VDC @ 500mA(Optional 24VDC CE, UL, CSA approved 115/230 VACpower supply available)Input Pressure Range, 85–150 PSIG (6–10 bar)Output Pressure Range, 0–80 PSIG (0–5.5 bar)Accuracy, ± .25% full scale @ 77°F (25°C)Cable, 6.5ft. (2m) cable included◗ APPROXIMATE DIMENSIONS◗ CIRCUIT DIAGRAM111
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Table of ContentsPRODUCTCAT ALOG10-
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Table of Contents◗PRODUCT NUMBER
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Table of Contents◗FAMILY OF PRODU
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Table of Contents“Air Champ” ®
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Table of Contents◗APPLICATION GUI
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Table of ContentsWeb ProductsGUIDE
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Table of Contents◗ MICRO FRICTION
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Table of Contents◗CALIPER BRAKES
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Table of Contents◗CALIPER BRAKESS
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Table of Contents◗DRUM BRAKES“A
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Table of ContentsDRUM BRAKES “Air
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Table of ContentsDRUM BRAKES “Air
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Table of Contents◗HEAVY DUTY BRAK
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Table of Contents◗METRIC BRAKES
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Table of Contents◗BRAKESWeb Produ
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Table of Contents◗TENSION CONTROL
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Table of Contents◗CLUTCH/BRAKES
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Table of ContentsCLUTCH/BRAKES “A
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