Kitz F Series - Page 44

Document No.：KE-4010-11                                            Page: 41/58
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2.  ConversiontoAIR-FAIL-OPENMode
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The standard AIR-FAIL-CLOSE mode of KITZ Type FAS spring return actuator can be converted to
AIR-FAIL-OPENmode,withoutchangingitscounter-clockwiseopeningoperation(Fig.1).
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(1) Checkthatthehousingpressurehasbeenequalizedtotheatmosphericlevel,loosen4hexagonheaded
boltsanddisassembletheendcover.
(2) Alsodisassemblethespringcartridgeunit.
(3) ForFAS-6,removetherubberplugandputitintotheoppositesideairpath.
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(4) Mountthespringcartridgetotheoppositeendopeningofthehousing.
(5) Alsomounttheendovertotheoppositeendopeningofthehousing,inplaceofthespringcartridgeunit.
(6) MoveaportstopperplugfromPort[S]toPort[O].
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StandardAIR-FAIL-CLOSEOptionalAIR-FAIL-OPEN
Fig.１
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(7) ApplytheactualoperationpressuretoPort[S]anddetectexternalairleakagewithusingsoapsolution,
throughthecontactoftheendcoverwiththehousing,thestopperboltandthesealwasher(Fig.2).  
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 Fig.2
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(8) Then,energizetheactuatorfortrialoperationtoensuretrouble-freefunction.
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(9) InsertMizukilleronabreathingportofaspringcase.
   Endcover/housingcontact
Stopperbolt/sealwasher
Rubberplug
FAS-6
Oppositeside
airpath