Emec F Series - Page 21

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FPV
Proportional/constant pumpdrivenbyawatermeterdigitalsignal.
Settingtheswitchonconstant position,thepumphasflowcontrol(frontpanelknobmaybeset
from0%to100%ofpumpnominalcapacity).Flowcontroliselectronicallysetanditoperatesonpump
injectionsnumber.Toavoidlinearityproblemdonotsettheknobofpumpflowbetween0%and10%.
Itisfurthermorepossibletodividethemaximummagnetstrokesperminuteby1,10and100usingthe
switchonthefrontpanel.
Settingtheswitchonproportional position,foreachexternalpulsecorrespondsonepumpstroke.
ThispumpcanbedrivenbyaCTFIorCWFIserieswatermeters.
Thispumpcanalsobedrivenbyadigitalsignalcomingfroma“voltagefree”contact.Drivingsignalis
appliedontheBNCplugontheleftbottomoffrontcover.Dividingfactor(N)valueisobtainedmultiplying
thevalueontheadjustmentknobusingthemultiplyingswitch(x1,x10,x100).
Capacity definition for “FPV” and “FAPV” pump
Usethefollowingformulatoobtainminimumpumpcapacity:
ppmxm
3

———————————————=l/h
1000 x K
l/h-minimumpumpcapacityrequired
ppm-productamounttodoseinp.p.m.(gr/m
3
)
k-dosedproductdilutionfactor(purechemicalk=1)
m
3
-maximumcapacityofsystemtobetreatedinm
3
/h.
Dividingfactor(N)tosetonadjustmentknob:
imp/lx cc
(————————————)x1000=N
ppmxK
N -numberoftheexternalpulsesaredividedtobesetonadjustmentknob
imp/l-pulseperlitergivenbythewatermeter
cc-pump’ssinglestrokedosingquantity(incc).Refertofollowingtable
k-dosedproductdilutionfactor(purechemicalk=1)
ppm-productquantitytobedosedinp.p.m.(gr/m
3
)
8. Models