Ductile Iron/Stainless Steel Quarter-turn Spring …

1 Morin Figure 79B ActuatorCopyright 1999 by TYCO International designs and specifications may change without M79B-5-99 p1 Ductile Iron/Stainless Steel Quarter-turn Spring Return and Double Acting ActuatorsOutput Torques to 115,000 and Benefits Ductile iron housing, piston and endcaps provide long product life withdurable, cost effective operation. Cylinders of 316 stainless Steel provide unrivaled corrosion resistance. Output shaft made of high strengthalloy Steel transmits torque withoutfatigue. Sintered bronze bushings or sealedneedle bearings on output shafteliminate side loading of valve stemto maximize stem packingperformance. Chrome-plated Steel piston rod provides strength and corrosionresistance for enduring high cycleapplications. Sintered bronze piston rod bushingsprovide low-friction support and precise alignment of the piston rodto increase efficiency, reducemaintenance and extend actuatorlife. Heat-treated stainless Steel thrustpin and rollers transfer piston forceto 17-4PH stainless Steel yoke byrolling to reduce friction, for longerlife and more efficient torquetransmission.

2 Teflon guide bands ensure low-friction piston guidance during operation to protect cylinder wallsfrom potential scoring and extendseal performance with a continuouscylinder wiping action. Bi-directional travel stops provideaccurate valve rotation adjustment. ISO 5211 mounting pattern promoteseasier valve adaption by utilizinginternationally recognized standards. Drive slot on output shaft enablesaccessory-driven components tomaintain a compact, low profileassembly and eliminates the needfor couplings. Tectyl-coated springs can bedisarmed without special tools tosafely and easily disassemble theactuator in the field, reducing downtime and providing a man safe Spring . Easily removable housing cover provides effortless access for internalinspection of yoke is a registered trademark of duPont de Nemours & CompanyGeneral ApplicationDesigned for on-off or modulating control of any Quarter-turn ball, butterfly,rotary plug or damper style valve DataSupply pressure: 40 to 160 psigSupply medium: Any pneumatic orhydraulic fluid compatible with materials of constructionTemperature rating:Standard range: -20 F to 210 FOptional range: -65 F to 300 FAngular rotation: 90 degrees 8 degreesMaking Flow Control EasierA INTERNATIONAL LTD.

3 COMPANYM orin Figure 79B ActuatorCopyright 1999 by TYCO International designs and specifications may change without M79B-5-99 p2 NoteFor readability, some item numbershave been excluded from Acting - Models 006 thru 100 Double Acting - Models 135 thru 1150 373625302975a329104131352411316182642724 1611826427373625302975b32910413135 Morin Figure 79B ActuatorCopyright 1999 by TYCO International designs and specifications may change without M79B-5-99 p3 Materials of ConstructionItemMaterialMaterial Standards1 HousingDuctile IronA3952 Yoke17-4PH stainless Steel *A564-6303 Output shaftAlloy Steel , plated*C41404 Piston rodSteel-chrome platedC10455aBushing-output shaft Model 006 thru 100 Sintered bronze5bNeedle bearing Model 135 thru 1150 Alloy steel6aRoll pin-yoke Model 006 thru 100 Alloy steel6bKey-yoke Model 135 thru 1150 Steel , plated7 Bushing-piston rodSintered bronze8 Retaining ring-shaftSteel, plated9 Thrust pin440C stainless Steel *10 Roller bearing440C stainless Steel *11 Retaining ring-pinSteel, plated12aSet screw Model 006 thru 100 Steel , plated**12bRetaining ring-lower bearing Model 135 thru 1150 Alloy steel13aPosition indicator Model 006 thru 100304 stainless steel13bThrust plate Model 135 thru 1150 Ductile iron14 Hex head boltSteel, plated**15 Lock washerSteel, plated**16 PointerSoft PVC17 Round head screwSteel, plated**18 Cover, housingSteel, plated19 Hex head boltSteel, plated**20 Lock washerSteel, plated**21 Flat washerSteel, plated**22 Thrust washer Model 135 thru 1150 stainless steel23 Cover gasketFiber24 Cylinder316 stainless Steel **A27625 PistonDuctile ironA39526 AdaptorDuctile ironA39527 End capDuctile ironA39528 Rod coverDuctile ironA39529 Seal-piston rodBUNA-N30 Seal-piston boltBUNA-N31 Seal-pistonBUNA-N33 Piston boltSteel, plated**34 Lock washerSteel.

4 Plated**35 Bearing-pistonTeflon 36 Thread sealEPDM/ Steel , plated**37 Travel stop boltSteel, plated**38 Jam nutSteel, plated**39 Socket head cap screwSteel, plated**40 Lock washerSteel, plated**41 Tie rodSteel, plated**43 Lock washerSteel, plated**44 Hex head boltSteel, plated**45 Thread sealBUNA-N46 Seal-cylinderBUNA-N47 Nameplate labelMylar49 Cylinder- Spring side316 stainless Steel **A27650 Tie rod- Spring sideSteel, plated**51 Hex head boltsSteel, plated**52 Adjusting boltSteel, plated**53 Flat washerSteel, plated**54 End cap- Spring sideDuctile ironA39555 Outer springSpring steel56 Inner springSpring steel57 BreatherSteel, plated**58 Spring labelLEXAN polycarbonate*Heat treated**Electroless nickel-plated carbon Steel on Figure 79C models**18-8 stainless Steel on sizes 006 thru 100**316 stainless Steel on sizes 006 thru 100 Teflon is a registered trademark of duPont de Nemours & polycarbonate is a registered trademark of the General Electric FAILURE!

5 The most common cause of actuatorfailure is wear on the seals. Ifcondensed water from air linescollects in an aluminum or steelcylinder, pitting will occur. Pitting willeventually destroy a seal and causepiston blow by and ultimate piston bearings come incontact with 316 stainless steelcylinders, a standard on all Morinactuators. Lubrication is neverrequired. All moving parts aresupported with sintered bronzebushings or sealed needle members including yoke,thrust pin and roller bearings aremade from heat treated Morin Actuator is designed toperform in the most demandingcorrosive includes a nice, clean,noncorrosive plant with water in its ofConstructionUsing Ductile iron and stainlesssteel, the 79B becomes thestandard for low cost valveactuation while providing highquality actuator housing, end caps,adaptors and piston are allmachined from Ductile ironcastings. This produces a rugged,low cost product through reducedmachining time and by eliminatingwasteful excess material.

6 Cylindersof 316 stainless Steel provide theultimate in corrosion resistance andincreased piston seal performancewhile reducing maintenance components that rotate or slideduring operation, such as the highstrength alloy Steel plated outputshaft, chrome-plated piston rod, stainless Steel thrust pin or theductile iron piston, are all supportedby replaceable friction 5211 MountingTo provide the greatest flexibility forvalve adaptation, each model has amounting pattern designed inaccordance with InternationalOrganization for Standardization(ISO) Travel StopsAdjustable stops on each end capprovide the flexibility of accuratevalve rotation positioning at the endof the open and close stops are located on thecylinder centerline, the optimalposition to maximize traveladjustment and eliminate anydetrimental side loading on thetravel stops. Adjustable from 80 to98 .Standard Options Manual Jackscrew Override Metric Mounting Threads Viton Seals Low Temperature BUNA-N 40 through 160 psig Spring Sets Full Stroke Travel Adjustment Lock-out Device Manual Handpump OverrideViton is a registered trademark of duPont deNemours & Designed for SafetyAll Spring return models incorporate a man safe Spring design that allowsthe actuator to be safely assembledand disassembled in the field withoutthe need for special tools.

7 Theintegral tie rods are bored andtapped to provide a means of loadingand unloading the Spring in a safeand convenient Drive SlotEach actuator output shaft isprovided with a precision machinedaccessory drive slot for low torqueaccessory devices such as limitswitches and positioners. Variousaccessories can be directlymounted to the center body ofmodels 135 through 1150 withoutthe need for extra couplings orbrackets. The result is a morecompact and rigid Indicator and PointerOn Models 006 through 100, the open-shut-open indicator plateallows the use of the same indicatorand pointer when the failure modeneeds to be reversed. Whenchanging from fail-close to fail-open on Spring return models,simply mount the stainless steelposition indicator plate and pointeron the opposite side of the position indicator plate andpointer can be mounted parallel orperpendicular to the Jackscrew OverrideThe manual jackscrew override is alow cost alternative to a manualdeclutchable override.

8 The manualjackscrew provides emergencyoperation of the valve by rotatingthe handwheel. Actuator travel stopposition is unaffected duringoperation of the jackscrew Figure 79B ActuatorCopyright 1999 by TYCO International designs and specifications may change without M79B-5-99 p4 Morin Figure 79B ActuatorCopyright 1999 by TYCO International designs and specifications may change without M79B-5-99 p5 Scotch Yoke Torque CharacteristicsSingle ActingSpring Return0 45 90 255075100125 Finish airSpringendSpringstrokeAirstrokeBreakai rBreakspringStrokeTorque0 45 90 255075100125 PublishedtorqueRunningtorqueBreak torqueStrokeTorqueAir to AirActualtorqueScotch Yoke MechanicsPiston rod axisMoment arm minimum (X)at mid stroke(45 )Moment arm maximum (Y)at end of stroke(90 )Normal90 stroke100 strokeStroke in degrees-50 5 10 15 20 2530354045 50 55 60 65 70 75 80 85 90 95A}YXX = Min. moment armY = Max. moment armFor max.

9 Moment arm at any stroke positionmultiply min. moment by secant ADouble ActingAir to AirSpringBreakAirBreakAirEndSpringEndX = Min. moment armY = Max. moment armCONCLUSION: GREATESTTORQUE OUTPUT IS ATBEGINNING AND END OFSTROKE_WHERE IT SNEEDED!Output Torques ( ) Double Acting - Air to AirActuatorAir Supply (psig)Model40506070809010011012013014015 0160006 Break30037545052560067575082590097510501 1251200 Run2352903504054605205756406907508108709 40015 Break75093511251310150016851875_____Run5 907358851030118013251475_____023 Break11501450172520102300258528753160345 03740402043004600 Run8551070128515001710192521402350257027 80300032103420036 Break18002250270031503600405045004950540 05850630067507200 Run1370171020552400274030803425377041104 450480051405480050 Break25003125375043755000563062506875750 0812587509375 10000 Run1840230027603220368041404600506055205 980644069007360072 Break36004500540063007200810090009800108 00____Run2740342541104790548061606850754 08220____100 Break500062507500875010000_____Run368046 00552064407360_____135 Break67508440101251181513500151901688018 56020250219402363025310 27000 Run5250656578759185105001181013125144401 5750170601837519690 21000210 Break10500131251575018375210002362526250 2887531500341253675039375

10 42000 Run8160102001224014280163201836020400224 4024480265202856030600 32640270 Break13500168752025023625270003037533750 3712540500____Run10500131251575018375210 0023625262502887531500____370 Break18500231252775032375370004162546250 5087555500601256475069375 74000 Run1308016350196202289026160294303270035 97039240425104578049050 52320420 Break2100026250315003675042000_____Run16 32020400244802856032640_____575 Break28750359004312550300575006469071875 790608625093440100625107810 115000 Run2244028050336603927044880504905610061 71067320729307854084150 89760740 Break37000462505550064750740008325092500 101750111000____Run261603270039240457805 232058860654007194078480____1150 Break575007187586250 100625 115000_____Run4488056100673207854089760_ ____Output Torques ( ) Single Acting - Spring ReturnActuatorAir Supply (psig)Model40506070809010011012013014015 0160006 Break195245290340390_____End105130160185 210_____015 Break485605730850970_____End260325390455 525_____023 Break75094511251305150016801870_2250_261 5_3000 End4005106007058009051005_1200_1410_1600 036 Break1170146017552050234026302925_3510_4 095_4700 End6307909501100126014151575_1890_2205_2 500046 Break15001870225026153000_____End8001005 120014101600_____072 Break23402925351040954700_____End1260157 5189022052500_____100 Break32504060488056906500_____End1750219 0262030603500_____135 Break43905485658076788775987510970_13160 _15355_ 17550 End2365295035454135472553155905_7090_827 0_9450210 Break682585301024011945136501535017060_2 0475_23890_ 27300 End3675459055106430735082709190_11025_12 860_ 14700270 Break878010970131601535517550_____End473 05905709082709450_____370 Break12025150301804021045240502705530060 _36075_42090_ 48100 End64759085971011330129501457016190_1942 5_22660_ 25900420