Basic Documentation

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Description
DesignedforusewithFlowriteandotherstandardvalveswith
a3/4-inchand1-1/2-inch(20and40mm)strokes,theFlowrite
SKB/SKCElectronicValveActuatorreceivesa0to10Vdcor4to20
mAcontrolsignaltoproportionallycontrolthevalve.Theactuators
areavailablewithstandardoradvancedfunctionality.
Features
Standard Features
Partnos.withUsufxhavethesestandardfeatures:
• Direct-coupledinstallationrequiresnospecialtools
oradjustments
• Visualandelectronicstrokeindication
• Die-castaluminumhousing
• Highestclose-offintheindustry
• 3/4-inchstroke(SKB)
• 1-1/2-inchstroke(SKC)
• 1000lbf.(4400N)nominalforce
• Manualoverride
• Springreturntofailsafeposition
• Maintenance-free
Advanced Features
Partnos.withUAsufxhavestandardfeatures,plusthese
advancedfeatures:
• Adjustablestartandspan
• Strokelimitcontrol
• Selectableoperationdirection(directorreverseacting)
• Choiceoflinearorequalpercentageowcharacteristics
• Designedtobeusedwithothermanufacturer’svalveswith
theappropriateUniversalValveRetrotKit
Applications
TheFlowriteSKDElectronicValveActuatorrequiresa24Vacsupply
andisdesignedtobeusedwithFlowriteandotherstandardvalves
inliquidandsteamserviceapplications.
Wiring Diagrams
SKB/SKC Series Electronic Valve Actuators
24Vac,ProportionalControl
SpringReturn
Specications
Nominal Stroke
SKB62U/UA ........................................................................ 3/4”(20mm)
 SKC62U/UA ..................................................................... 1-1/2”(40mm)
Operating Voltage ................................................................ 24Vac±20%
Frequency ................................................................................... 50/60Hz
Power Consumption
SKB62U/UA .........................................................................18VA(12W)
 SKC62U/UA .........................................................................28VA(20W)
Control Signals
ControlInput(Y) ................................................. 0to10Vdcor4-20mA
 MaxImpedance
  0to10Vdc......................................................................... 100KOhm
  4to20mA ........................................................................... 250Ohm
 ControlInput(Z)
  Resistance .................................................................. 0to1000Ohms
  Voltage ............................................................................... 0to1.6V
 FeedbackOutput(U)
  Signal..........................................................0to10Vdcor4to20mA
 LocalImpedance
  0to10Vdc....................................................................... >500KOhm
  4to20mA ......................................................................... <500Ohm
 RunTimewithControlOperation(fullstroke)
  Opening .................................................................................... 2min.
 ClosingwithSpring
  SKB62U .................................................................................... 15sec.
  SKC62U .................................................................................... 20sec.
Conduit Opening ...................................................................... 1/2”NPSM
Nominal Force
NCand3-wayUpper
  Stroke ........................................................................................... 0%
  Force........................................................................ 640lbs.(2800N)
 NOand3-wayByPass
  Stroke ....................................................................................... 100%
  Force...................................................................... 1000lbf.(4400N)
Agency Approvals .................................................................. UL873,cUL,
CSAC22.2No.24-93,
CEN474
Enclosure ............................................................... NEMA1(InteriorOnly)
Operating
AmbientTemperature .........................................5to130°F(-15to55°C)
 MediaTemperature ........................................14to428°F(-10to220°C)
Mounting Location ................................................ NEMA1(InteriorOnly)