Farr KT5500 - Calculation of Required Desiccant

KT5500 5-
1
/
2
” Tong & CLInCHER® BaCKup
SECTIon ConTEnTS
3.30
TECHnICaL ManuaL
MaInTEnanCE
Ifpossible,storeinasealed,climatecontrolledenvironment.Ifisolatedstorageisnotavailable,Farrrecommendsstoringyourwrapped
equipmentinasecure,out-of-the-waylocation,usingsilicageldesiccanttoreducethehumiditywithinthewrapping.Asaguideline,use
125g.ofdesiccantforeachcubicmetreofspace,or3.5g.percubicfoot.
cAlculAtion of requireD DesiccAnt
1) Calculatethetrappedairvolumebymeasuringtheoutsidedimensionsofthetooltobestored,andtreatthatasthevolume
tobestored.Forexample,theexternaldimensionsofaKT2000020”powertongare80.25”x50.5”x28”,whichcalculates
toanapproximatevolumeof113500in
3
,or66ft
3
(1.87m
3
).
2) Multiplythecalculatedairvolume,incubicfeet,bytherecommendedamountofdesiccantpercubicfoot.Carryingforth
the example usedintheprevious step, the required desiccant chargewould be 3.5g.x 66 ft
3
,equaling 231g. Several
manufacturersoffersilicageldesiccantinpackagedquantitiesof125gramsperbag,sotwopackagesofdesiccantwould
berequired.Pleasekeepinmindthatthisisaguidelineonly-moreorlessdesiccantmayberequiredinextremeenviron-
mentalconditions.
For best corrosion resistance the equipment should be removed from storage and exercised on a regular basis, depending on the
storageenvironment.Farrrecommendsthatforequipmentstoredinasalt-watermaritimeorexposeddustyenvironment,repeatsteps
9through24monthly.Forequipmentstoredinisolatedstorageinanon-maritimeenvironment,repeatsteps9through24quarterly.
Replacedesiccantpacksatthistime-depleteddesiccantpacksmaybetreatedasregulardunnage.