Basic Documentation

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Description
DesignedforusewithFlowriteandotherstandardvalveswith
3/4-inchand1-1/2-inch(20mmand40mm)strokes,theFlowrite
SKB/CElectronicValveActuatorrequiresa24Vacsupplytocontrol
thevalve.
Features
• Direct-coupledinstallationrequiresnospecialtools
oradjustments
• Visualandelectronicstrokeindication
• Die-castaluminumhousing
• Manualoverride
• Springreturntofail-safepositionavailable
• Maintenance-free
• 1000lbf.(4400N)nominalforce
Applications
TheFlowriteSKB/SKCElectronicValveActuatorwithoatingcontrol
istobeusedwithFlowriteandotherstandardvalveswitha3/4-inch
and1-1/2-inch(20mmand40mm)strokesinliquidandsteam
serviceapplications.
Wiring Diagrams
SKB/SKC Series Electronic Valve Actuators
24Vac,Floating3P
SpringReturnorNon-SpringReturn
Specications
Operating Voltage ................................................................ 24Vac±20%
Frequency ................................................................................... 50/60Hz
Power Consumption
SKB82.50U .....................................................................................10VA
 SKB82.51U .....................................................................................15VA
 SKC82.60U .....................................................................................19VA
 SKC82.61U .....................................................................................20VA
Control Signal .............................................................................. Floating
Nominal Stroke
SKB .................................................................................... 3/4”(20mm)
 SKC ................................................................................. 1-1/2”(40mm)
Run Time with Control
Operation (full stroke) .................................. 90sec.OpeningandClosing
Spring Return Time (on power failure)
SKB82.51U ................................................................................... 10sec.
 SKB82.61U ................................................................................... 18sec.
Nominal Force
NCand3-wayUpper
  Stroke ............................................................................................ 0%
  Force........................................................................ 610lbs.(2684N)
 NOand3-wayByPass
  Stroke ........................................................................................ 100%
  Force...................................................................... 1000lbf.(4400N)
Agency Approvals ..........................................................................UL873,
CSAC22.2No.24-93
Enclosure ............................................................... NEMA1(InteriorOnly)
Operating
AmbientTemperature .........................................5to130°F(-15to55°C)
 MediaTemperature ........................................14to300°F(-10to150°C)
Mounting Location ................................................ NEMA1(InteriorOnly)
EA0744R1
EARTH GROUND
ISOLATING CLASS 2

TRANSFORMER FOR

24 Vac POWER

120 Vac
Y2
Y1
G
NEUT
CONTROLLER
24
Vac
EA0745R1
EARTH GROUND
ISOLATING CLASS 2
TRANSFORMER FOR
24 Vac POWER
120 Vac
21
Y2
Y1
G
1
0
0
NEUT
CONTROLLER
24
Vac
NSR SR