Kitz F Series - Page 57

Document No.：KE-4010-11                                            Page: 54/58
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8.3InthecaseofTypeFASspringreturnactuatorswithmanualoperatorunits(AIR-FAIL-OPENmode),
FSWunitsshallbemountedonthereversesideofactuatorsasshowninFig.17.
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 Fig.17
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8.4ForoperationofTypeFASspringreturnactuatorsequippedwithFSWmanualoperators,readthefollowing
instructionscarefullybeforehandling.
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8.4.1Manualoperation
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(1) Equalizethehousingpressurewiththeatmosphericlevel.
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(2)Rotateahandwheelcounter-clockwisetoopenthevalve.
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(3)Attheendofthehandwheeltravel,apositionindicatorofanactuatorwillindicatethatthevalveisfully
open.  Addinganyfurtherloadtothehandwheelmaycausedamageorfailureoftheactuator.
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(4)Rotatethehandwheelclockwisetoclosethevalve.
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(5)Attheendofthereversetravelofthehandwheel,thepositionindicatorwillindicatethatthevalveisfully
closed.  Addinganyfurtherloadmaycausedamageorfailureoftheactuator.
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 Don’tuseleversorwrenchestorotatehandwheelsofFSWunits.Anexcessiveloadto
thehandwheelsmaycausedamageorfailureofactuators.
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 When manual operation of an actuator is changed to automated operation, ensure to
rotateahandwheelclockwisetillitcompletelystops.  Otherwise,subsequentautomated
operationofanactuatormaycauseinadequatevalveopeningrangeanddamageofthe
actuator.
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 [AIR-FAIL-OPEN] 