valve actuator by hanafi91


Electro      Positioner

The NIP600 electro-pneumatic positioner is controlled by an
electrical input signal and meehanical feedback. The output is
pneumatic. Applications include operation of diaphragm
actuated regulating valves.

                          brformonce through

             SMC                umatics,
Convertsa D.Cinput signal into a
pneumaticoutput for positioningof
control valves.
Wide supply pressurerange
2o-looPsl (1.4-7kgt / cm') .
Available singleor doubleacting mode.
Quick responsetime.
Easyconversionfrom direct to reverse
action and vice versa.
Built-inautomatic/manual(A/M ) selector.
Linear,square and square root
characterization cams.


Type                                                                                                  Cam type
                                                                                                                            Double acting

Inputcurrent                                                                       4 lo 20 mADC (standard)
                                                           3580Q      8840                                   (tO-SOmn)
                                                                          (2-1OrnA), (4to 20mA),155Q(5-'25mA),
                                                                                  2350                    SeO
Supply pressure
       air                                                                      20 to 1OOPSI (1.4 to Tkgflcm')
                                                                                 (standard) 60'to1OO"
                                                        o'40to 3.35inch(10to Bsmm)
Sensitivity                                                               0.5o/o less

Linearity                                                                  +2oloor less               +2oloor less

Hysteresis                                              O.75Vo less
                                                             or                                       1olo less

Repeatability                                                                              +0 5olo less

Output flow                                                        2.sSCFM (7oN//min) at 2CPSI(1 4kgl/cm2) supplv pressure

Air consumotion                                                    O.25SCFM(7N0/min) 2OPS|
                                                                                      aL      (1.akgflcm'?)supply pressure

Ambient and fluid temperature                                                    1 4 ' t o1 4 0 ' F ( - 1 0 o + 6 0 ' c )
Air connections                                                                         %NPTF (female)

Electrical connections                                                                   %Pr (temale)

Material of body                                                                        Aluminum diecasl

Weishtlbs (kgf)                                                                                 b. / \.1./

X For split range specifications, consult the factory

How To Order

            N IP6                               oYe
                                                      I lccessories (optional)
                                                      C'- Serration joints(ForNlP610)
   Electro-Pneumatic                                  J - Allenwrench  (Fortightening      cover)
                                                      ' wlth joint, po1e,hex, nul, and cross rec*sed head screw

                                             1/2 PF (female)
             00 - Levertype
             10 - Camtype
                 lnput Current          1-    30 PSI (2kg cm'z)
                 0-4-20mADC(standard)   2-    45 PSI (3kgtcm')
                 '2-2-10mADC            3-    150 PSI {1okg/crn'?)
                 '3-5-25mADC            4-    60 PSI (4kg|/cm')
                 *4 - 10 - 50 mADC      6-    90 PSI (6kglicm")
                 ' SpecialOrder


Ogeration'/ Construction
Model MmOO(Lever type) Single acting, Normal operation

    When the input current increas€s,the armature witt be subjected to
    a clockwise torque, pushing the flapper lever to the teft. As a
    result, the clearance betwe€n the nozzle and ftaoDerwill increase
    and th€ nozzle back pr€ssurewill dec.ease. ConseqL€ntlv,the
    exhaust valve of the pilot valve assembly witt move to the left,
    causing the output air pressure of OL,T'l to increase and drive
    the diaphragm actuator. The movement ot the diaphragm actuator
    will act on the feedback spiing vra the feedback lever and the
    span adjusting lever, balanc)ng ihe force generated by the input

    The gain suppression spring is designed to immediatelyfeedback
    the movement ot the exhaust valve to the flapps Iever, thereby
    contributing to loop 9tability. Zero point adiustment is performed by
    varyrng lhe tenston force of the zero adjustng sping.

     Block Diagram Operation

                                                                                     [-               Whenreverseactionisrequired,
                                                                                                      change lhe shatt ol the span
                                                                                                      adjusting lever to the oppogrte
                                                                                                      s i d e a n d c o n n e c to u t p u t p r e -
                                                                                                      ssureto ouT 2.
                                                                                                      N o t et h a t t h e s p a n a d j u s t i n g
                                                                                                      knab should point upwards.

i/lodet NIP61O(Cam type) Double acting, Normat operation

    When the input current increases, the armature wrtt be subjected to     lnput curent terminal
     a clockwrse torque, pu6hing the flapper lever to the left. As a
    result, the clearance between the nozzle and flapoer will Increase
    and the nozzle back pressure will decrease. Consequenfly,the
    exhaust valve of the pilot valve assembly will move to the left,
    causing the output air pressufe of OIJTI to increase and that of
    OL,T2 to decrease to rotate th€ rotary actuator. The movement
    of the actuator will act on the feedback spring via the
    leedback shaft, gears, cam, and span adjusting lever,
    balaocing the fcrce generated by the input current.
    The gain suppression spring is designed to immediatety
    feedback the movement ol the exhaust valve to the ilapo€r lever,
    lhereby contributingto loop slability.Zero poinl sdjush€nt is
    performedby varying th€ tension torce ofthe:ero adjusting spring.

    Block Diagram Operalion

                                                                                          VYhen reverseaclion is requi€d,
                                                                                          turn over the c€m and reverse
                                                                                          connection ot OUI1 and Ou-Iz.

Pipe Connection Variations
                     Sinsle Acling
  Positioher : Model NtP6oo                              Positioner: ModelNIP6OO
  Operationmode : Stem movesdownwardwhen input current   Operationmode : Cylinderrod movesdownwardwhen input

  Posiiioner: Model NIPoOO                               Positionel: ModelNIP6OO
  Operationmode : Stem movesupwardwhen input current     Operationmode : Cylinderrod movesupwardwhen input


 Positioner: Model NIP6OO                                Positioner : Model NlPotO
 Operationmode : Stem moves upwardwhen input current     Operationmode : Shattrotatesclockwiseviewedfrom front of
                 Increases.                                                positioner
                                                                                    when input curreni increases.

                                                         Foroperationmodewith counterclockwiserotation,
                                                                                                      turn cam
                                                         upsidedown and reversepipingsto OUT1and OUT2.
vvhen installingthe positioneron a diaphragm actuatorwith a diameterof about 8.0 inch (200mm) less,the gain supffessionspring
may have to be changed if instabilityoccurs.

Model NIP6OO(Levet type)                                                                     Model NIP61O(Cam type)
(DDependingon th€ desired installation method, make a proper bracket and secure the          Olnstall the positioner to a rotary
positioner fhe diaphragm
            to               actuatorby makinguse of the applicablefemalethreaded            actuator in such a manner that the
installation holes located on the aide or rear o{ the positioner.                            fe€dbaoKshaft oJ the Positioner is
OFix the coupler,which tansmits the displacement the valve stem to the teedback
                                                       ot                                    concertric with the main shaft of the
lever. in such a Dosition that when the inDut curenl is soyo, the feedback lever is at       actuator,In a conect mountingcondition,
right anglesto the valve stem.                                                               the joint,shouldslide up and down
The ligure bglow ghowg the connection viewed from the tront of the positioner.               reg€rdless the Positionof the
                                                                                             f€€dback shaft.
                                                                                              OFor such an operationmodethat the
                                                                                             main shaft ot the actuatorrotates
                                                                                             clockwise when the input current
                                                           Positionof 0% (or 10O%)            increases, use the DA side of the cam.
                                                                                             Foroppositeoperationmode,the main
                                                           Position of 50%
                                                                                             shaft ol the ac-iuatorrotates counter
                                                           Position of 100% (or 0%)
                                                                                              us€the BA side.Setihe cam properly
                                                                                             to the recessedface. Note that the terms
                                                                                              "clockwise"and "countefclockwise"
                                                                                              meanth€ rotating  directions viewed
                                                                                              lrom the frontof the positioner
OFor directoperation modein whichthe valvestemmows downwards          whenthe input
currentincreases, connectthe feedbackleverto the valw stemin such a mannerthat               OSet ths positioner  cam at the
the slackeliminatormay be on the iop of lhe coupleras shownabove.                            actuator'sstartingpositionby aligning
Forrewrse operation  mode,in wf|ichthe valvestemmo!€supwardswhenthe inpul                    the base line, stampedon the cam, with
current increases,connect the leedback lever with the lace turned over to lhe valvestem      the span adiustable arm unit bearing
so thatthe springis on the bottomof the coupler                                              lf the actuatorrotationangle is beMeen
Ospeaified linearitycan be ob'tained  with an angulartravel lrom 1o'to 30". A travel angle   MAX 60"to 80' , adjust the cam so that
of aoDrox. is most suitable.
           20'                                                                               the startingpoint where the cam touches
                                                                                             the bearingjs offset 40"tozo'
                                                                                             respectivelytrom the base line malk
                                                                                              O Forsafety, not applythe suPPlY
                                                                                              oressure whilethe cam is beinginstalled.

                                                                                             Examplewith serrationioint

                                                                                             Exampleof cam installalion

                                                                                                 /+'.' l                  Bearing
                                                                                                 I          "   /
                                                                                                      RA side

                                                                                         Span can be adjustedby rotatingth€
The figure below showsthe terminalbox     OUse clean, dust free, dry air for the         span adjusting knob with the lock screw
with the cover removed.                   suppry.                                        loosened.  Rotatingthe knob clockwise
Connectthe lead wires fom output          OBe careful to prevent the entry oJ            will increasethe span and
terminals"+" and "-" insidethe terminal   pipe scaleinto the positionelBlow out          counter-clockwise  will decrease.See the
box of the positioner,
                     respectively.        all lines and fittings before use              indicationFFTSPANF=I on the span
Conduitpipe connectionports are female    OFor singleacting tYPeactuator                 adjustinglever.
parallelpipe threads1/2PF,20 mm deep.     apolications,  reler to the diagragms on       After sDanadjustmentis complete,

                                          page 4, and plug either OUT 1 or OUT 2.        tighten the lock screw
                                          OBe caretul not to apply shock to the
                                          torquemotoror apply excessiveforce to          zero adjustment
                                          the smature arm, as this will jeopardize       Set the inDutcurrentat O% (4 mA), ano
                                          performance.                                   then rotate zero adjustingknob by hand
                                          ODo not removethe ter                          to vary the tensionof the zero adjusting
                                          hazardouslocationwhile the unit is             springso that the startingpositionas
                                          running.                                       aligned.Botatingthe knob cjockvvise  will
                                                                                         advancethe startingpo.sition and

                                          @in the torquemotor chamberis
                                          installed pre-adiusted
                                                    a               torquemotor,         counter-clockwise retard.
                                          do nol attemptto removethe cover.                       (A/M) selector
                                           OThe unit must always be used with the
                                                                                         When manualoperationot a diaphragm
                                          terminalcover and body cover installed.
                                                                                         valve is required,turn the A/M s€lector
                                           O In applications  where the unit is used
                                                                                         in the M direction,and then the supply
                                          outdoors.Avoid     mountingthe unit with the
                                                                                         air pressure can directly be ted to the
                                           rear side(the torquemotorcover side)
                                                                                         OUT I side,allowingthe diaphragm       valve
                                           faced upward.
                                                                                         to be operatedby control of the pressure
                                                                                         regulating valve in the supply pressure
                                                                                         line. When operatingthe diaphragm       valve
                                                                                         by the input curr€nt,rotatethe A/M
                                                                                         selectorin the A direction.
                                                                                         Note that this selectoris operativeonly
                                                                                         when OUT 1 is used underthe single
                                                                                         acting is in operative
                                                                                         when OUf2 is used und€r the single
                                                                                         acting modeor wh€nthe double acting
                                                                                         operationmode is chosen.This selector
                                                                                         is tor manualadjustmentin the ti€ld,and
                                                                                         thus should not be used as a meansfor
                                                                                         emergency   purposes. not loosenthe
                                                                                         recessed  headscrewon the toD of the
                                                                                         selectoi because it is tor prercnting the
                                                                                         selectorfrom slippingoff.

                                                                                         This device is factory-adjusted before
                                                                                         shipment.  and usuallydoes not require
                                                                                         furtheradjustment.   Rotatingthe sensitivity
                                                                                         adjustingscrew clockwise will cause
                                                                                         sensitivity increase,
                                                                                                     to          and counter-
                                                                                         clockwise to decrease.   This device is
                                                                                         usedin a doubleactingmode.Do nol
                                                                                         loosenthe recessed    headscrewon the
                                                                                         top of the sensitivity        screw
                                                                                         becauseii is lor prelentingthe screw
                                                                                         trom slippingotf.

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 SMCoffers the samequality and engineeringexpertisein many other pneumaticcomponents
 Valves                          Valves                 Cylinders/Actuators          Vacuum                         Air Preparation Equipment
 Directional                     Prooortional
                                            Valves      CompactCylinders             Vacuum Ejectors                Filters-Regulators-Lubricators
 ManualValves                    MechanicalValves       MiniatureCylinders           Vacuum Accessories             Coalescing Filters
 Mufflers                        MiniatureValves        RodlessCylinders             Instrumentation                Micro MistSeDarators
 ExhaustCleaners                 FluidValves            RotaryActuators              PneumaticPositioners           Fittings
 Quick ExhaustValves                                    PneumaticGrippers            PneumaticTransducers           Air Fiftings

                                                     SMC Pneumatics
                                               P.O.Box 26640, Indianapolis, 46226
O 1978-1999SMC Pneumatics,
                         Inc.All RightsReserved.

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