FSW-120 Series
Molded Flow Switch
M-5170/1112
Installation: FS W -1 2 0 un i t s ar e fa c t o r y- c a l i b r a t e d wi t h wat e r in ve r t i c a l po s i t ion, wit h le a d wi r e s up . Ob s e r v e prop e r
directi o n o f l i q u i d fl o w , a s m a r k ed “ IN ” a n d “ O U T ” on h o u s i n g . C an be i n s t a l l e d i n an y o r i e n t a t i on.
Be c a r e f u l t o ke e p fo r e i g n ma t e r i a l ou t of u n i t s d u r i n g in s t a l l ati o n . Us e o f 50 mi c r o n fi l t r a t i o n is re c o m m e n d e d . Al l pl a s t i c
NPT thread s sho u l d be inst a l l e d u s i n g a s u i t a b l e t h r e a d se ala n t . (S u c h as Tefl o n t a p e o r Pe r m a t e x “ N o M o r e L e a k s . ” )
Seal a n t m u s t b e k ept ou t o f u n i t during i n s t a l l a t i on.
Avoi d o v er - t i g h t e n i n g wh e n co n n e c t i n g p i p i n g to un i t , wh i c h is con s t r u c t e d of plas t i c ma t e r i a l . Co n n e c t i o n of me t a l l i c p i p ing to p l a s t i c u n i ts i s n o t r e c o m me n d e d .
WAR N ING: F S W - 1 2 0 fl o w sw i t c h e s are plastic, straight - t hread, “ O ” ring s e a l e d in s t r u m e n t s .
Ov e r-tighten in g w i l l r e s u l t i n breakage.
Port Ada pter Fi t t in gs: In s ta l l p l a s t i c a da p t e r s w i t h O - r i n g s (su p p l i e d ) d i rectl y i n t o “ IN” a n d “ O U T ” po r t s be f o r e i n -
stall i n g u n i t. C A U TION: D o no t e x c e e d 2 0 i nch - pounds m a x i m u m t o r q u e wh e n inst a l l i n g ada p t e r fitt i n g s . H old w r e n c h fl a t s
on ad a p t e r s as in di c a t e d be l o w wh e n in s t a l lin g un i t in pi pin g to pr e v ent ad d i t i o n a l torq u e ac c u m ulati o n be t w e e n ad apt e r
and bo d y . ( N o t e : P o r t a d a p t e r f ittin g s m u s t b e purc h a s e d s e p ar a t e l y . )
Ma i n tenance: T h e on l y m ai n t e n a n c e no rma l l y re q u i red is oc cas i o n a l cl e a ning wh e n exc es s i v e co ntam i n a t i o n is pre -
sent i n th e li q u i d . To di s a s s e m b l e th e unit f o r cl e a n i n g : Wi th s y s t e m s h u t do w n an d n o li q u i d in pi p i n g , re m o v e (1 ) Pi s t o n
Plu g , ( 2 ) Sp r i n g , an d ( 3 ) Pi s t o n . I t i s no t n e c es s a r y t o r e m o v e th e u n it f r o m th e s ystem . R e a s se m b l e unit i n re v e r s e o rde r
(#3 to # 1 ) . U s e c a re w h e n h a n d l ing s p r i n g t o p r event di s t o r t i o n .
Dimensions
Adapter Size
1/8” NPT
Wiring Diagram
Part Number FSW-120-18
Switch Ratings Maximum
Resistive Load
VA Volts Amps AC Amps DC
0 - 30 .4 .3 20
120 .17 .13
240 .08 .06
NOTE: The switch mechanism is an
hermetically sealed reed switch for
pilot duty only.
Specifications
Wetted Parts
Housing and Piston
O-Ring
Other Wetted Parts
Spring
Operating Pressure
Operating Temperature
Set Point Accuracy
Set Point Differential
Switch
Inlet/Outlet
Electrical Termination
PPS Resin - R4
FKM
Epoxy
316 Stainless Steel
250 psig at 70° F
-0° to +225°F (-17°C to +100°C)
15%, Maximum
20%, Maximum
SPDT, 20 VA
9/16” - 18 UNF - 2B Thread
18 AWG, 24” L., PVC Lead Wires
1/4” NPT
Part Number FSW-120-14
Thi s pr o d u c t is su i t a b l e fo r Cl a s s I an d Cl a s s II applic a t i o n s on l y , pe r th e re q u i r em e n t s of st a n d ard
EN6 0 7 3 0 a n d a n y a d d i t i o n a l s p e c i f i c r equi r e m e n t s
for a p a rticu l a r appli c a t i o n o r m e d i u m b e i n g se n s e d . Cl a s s I
com p l i a n c e of m e t a l bo d i e d unit s r e q u ires a gr o u n d conn e c tion b e t ween t h e me t al b o d y a n d t h e ea r t h i n g sy s t em o f th e
instal l a t i o n . C l a s s I c o m p l i a n c e o f p l a s t i c b o d i e d u n i ts in
contact wi t h a cond u c t i v e me d i u m r e q uires that the m edi u m
be eff e c t i v e l y e arthe d s o a s t o p r o v i d e a n eart h e d b a r r i e r
bet ween t h e u nit a n d a c c e s s ibl e a r e a s . F o r C l a s s II I c o m p l i ance, a s u p p l y at sa f et y ex t ra - l o w v o l t a g e ( S E L V ) m u s t be
provided . P l e a s e c o nsult t h e F a c t o r y for co m p l i a n c e i nfo r mat i o n o n s p e c i f i c pa r t n u m b e r s .
Important Point s: Om eg a p r o d u c t s m ust b e m a i n t a i n e d a n d i n s t a l l e d i n st r i ct a c c o r dan c e w ith t h e Nati o n a l Elec t r i c al
Code an d th e ap pli c a b l e Om eg a pr o d u c t in s t ru c t i o n Bu l leti n th a t co v e r s ins t a l l a t i o n , op er a t i o n an d pr o p e r ma i n t en a n c e .
Fa il u r e t o o b s e rve thi s i n f o r m ation m a y r e s u l t i n se r i o u s i n j u r y o r d a m a g e s .
Fo r ha zar d o u s a r e a a p p l i c a t ion s in v o l v i n g s u c h t h i n g s a s , b u t n o t l i m i ted to , igni t a b l e m i x t u r es, co mb u s t i b l e d u s t a n d
flam m a b l e m a t erial s , u s e a n a p propriat e e x p l o s i o npr o o f e n c l o s ure o r i n t r i n s i c all y s a f e i n t e r f a c e d e v i c e .
Ple a s e a dh e r e to t he p ressur e an d t e mpe r a t u r e li m i t a t ions s h o wn t h r o ugh o u t thi s ca t a l o g fo r ou r le v e l an d flo w se n s o r s .
Thes e l i mi t a t i o n s mus t n o t b e e x c eede d . T hese p r e s sur e s a n d t e m peratu r e s t a ke i n t o co n s i deration p ossi b l e s ystem
surge p r e s s u r e s / t e m per a t u r e s and thei r f r e q u e n c i es.
Sel e c t i o n o f m a t e r i als f o r c o m p a tib i l i t y w i t h t h e m edi a i s c r i t i cal t o t h e l i f e a nd o p e r a t i o n o f Om e g a p r o d u c t s . T a k e c a r e i n
the pro p e r s e l e c t i on of m a t e r i a l s o f c o n s t r u c t i o n , test i n g i s r e q ui r e d .
Life e x p e c t a n c y o f s wit c h c o n t a c ts va r i e s w i t h a p plic a t i o n .
Am b i e n t t e m p e r a t u r e c h a n g e s d o a f f ect s w i t c h s e t p oints , s i n c e the grav i t y o f a l iquid c a n v a r y with tem p e r a t u r e .
Our sens o r s h a v e b e en d e s i g n e d t o resi s t s h o c k and v i b r a t i o n . Howev e r , s h o c k and v i b r a t i o n s houl d b e m i n i mi zed.
Fi lt e r l i q u i d m edia c o n t a i n i n g pa r t i c u l a t e a n d / or d e b r i s t o e n s u re t h e p r o p e r oper a t i o n o f o u r pro d u c t s .
Ele c t r i c a l e n t r i e s a nd m o u n t i n g poi n t s i n a n e n c l ose d t a n k m ay re q u i r e l i q u i d / v apo r s e a l i n g .
Our sens o r s m u s t n o t b e f i e l d -r e p a i r e d .
Ph ysica l d a m a g e s u stain e d b y p roduct m a y r e n d e r it u n s e r v i c e a ble.