Bronkhorst FLOW-SMS Series Manual de usuario Pagina 22

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BRONKHORST HIGH-TECH B.V.
9.17.057 page 22
4.1.5 Maximum pressure drop
Forsolenoidoperatedcontrolvalveswithsmallorificesthemaximumallowablepressuredropforgasesisaccording
tothegeneraltablebelow.PleasekeepinmindthatthepressureratingforFLOWSMSis10baronly.TheKvvalueof
theshutoffvalves,infrontofandbehindtheflow/pressurecontrollers,mustbe1.5timeslargerthantotalKvvalue
ofthecontrollers.Otherwisethepressuredropovertheshutoffvalvewilldisturbthecontrolperformance.
Diameter[mm] K
v
Normallyclosed
pmax.[bard]
Normallyopened
pmax.[bard]
0,05
0,07
0,10
0,14
0,20
0,30
0,37
0,50
0,70
1,00
1,30
1,50
1,70
2,00
4,33x10
5
8,48x10
5
1,73x10
4
3,39x10
4
6,93x10
4
1,56x10
3
2,37x10
3
4,33x10
3
8,48x10
3
1,73x10
2
2,93x10
2
3,90x10
2
5,00x10
2
6,63x10
2
40
30
30
30
30
30
30
30
24
12
8
6
5
3,6
30
20
20
20
20
20
20
20
15
8
5
n.a.
n.a.
n.a.
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