
www.goetze-armaturen.deAssembly and maintenance instructions - 484 / 6 84
1. Lifthandwheel,releasespringbyturningthehandwheelanticlockwise.
2. Unscrewspringcover(DN8-DN25)and/orflangescrews(DN40-DN50)evenly.
3. Removespringcover(2)andspring(3).
4. Loosencover(6)witha2-pinwrench/open-endedwrench,removereturn
spring(4).ReplaceO-ring(5)oncover.
5. Unscrewthesealingplugs(8)andreplacetheO-ring(7),thenreinstalland
tightenthem.
Thecontinuedcourseofactiondependsontheversionofthepressurereducer.
(Indicatedontypeplate)
Diaphragm version 684/484 m-GSM with service pack 684/484-mGSM DN..
(Fig. c and Fig. b)
6. Removesleeve(9)(forDN8-DN25only)anddiaphragmplate(10),remove
diaphragms(11),removeconeseal(15)downwards.
7. Removelockingring(12)inhousingusingcirclippliers,removewasher(13)and
replaceO-ring(14).Reinstallwasherandlockingring.
8. Insertnewsealcone(15)andreturnspring(4)andscrewincover(6)andtighten
it.
9. Insertdiaphragms(11),pushdiaphragmplate(10)throughthediaphragmhole
withthepin.Fitsleeve(9)(forDN8-DN25only).Installspringcover(2)with
spring(3).Indoingso,tightenspringcoverat20+2Nmtorqueandevenly
tightentheflangescrews(forDN40andDN50)at30+2Nmtorque.
Course of action: (Fig. a and Fig. b)
Diaphragm version 684/484 m-GFO with service pack 684/484-mGFO DN..
(Fig. d and Fig. b)
6. Removesealcone(17);forDN8–DN15,removetheentirespindle-diaphragm
unitupwards.ForDN20–DN50,tightenwithanAllenkeyonthebottomsideof
thespindle(16)andloosenthehexagonalnut(18).Removediaphragmplate(19)
anddiaphragms(11).Removethespindledownwards.
7. Removelockingring(12)inhousingusingcirclippliers,removewasher(13)and
replaceO-ring(14).Reinstallwasherandlockingring.
8. ForDN8–DN15,insertthepreassembledspindle-diaphragmunitfromabove
andslideonthenewsealcone(17)frombelow.ForDN20–DN50,insertthe
spindle(16)frombelowandslideonthenewsealcone(17)frombelow,slide
thediaphragms(11)overthespindlefromthetopandfitthediaphragmplate
(19).Fitthenut(18)byhanduntilthediaphragmplatecannotbeturnedany
moreandtightenitwitha1/4turn;indoingso,tightenfromthebottomatthe
spindle’shexagonalsocket.ApplyLoctite249tothenuttolockthescrew.
9. Insertreturnspring(4)andinstallcover(6).Fitsleeve(9)(forDN8-DN25only).
Installspringcover(2)withspring(3).Indoingso,tightenspringcoverat20+2
Nmtorqueandevenlytightentheflangescrews(forDN40andDN50)at30+2
Nmtorque.