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PDF VXF22 Data sheet ( Hoja de datos )

Número de pieza VXF22
Descripción Direct Operated 3 Port Solenoid Valve
Fabricantes SMC 
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CAT.EUS70-26 A -UK
Direct Operated
3 Port Solenoid Valve
For Water, Oil, Steam, Air
Reduction of
power consumption
(DC specification)
6 W 4.5 W
78 W W
11.5 W 10.5 W
3New
VX Series VX31/32/33

1 page




VXF22 pdf
Solenoid Valves Flow Characteristics
C : Sonic conductance [dm3/(s·bar)]
b : Critical pressure ratio [—]
P1 : Upstream pressure [MPa]
P2 : Downstream pressure [MPa]
t : Temperature [°C]
Note) Formula of subsonic flow is the elliptic analogous curve.
Flow characteristics curve is indicated in the Graph (1) For details, please use SMC’s “Energy Saving Program”.
Example)
Obtain the air flow rate when P1 = 0.4 [MPa], P 2 = 0.3 [MPa], t = 20 [°C] for a solenoid valve where C = 2 [dm3/(s·bar)] and b = 0.3.
According to formula (1), the maximum flow rate = 600 x 2 x (0.4 + 0.1) x
293
————— = 600 [dm3/min (ANR)]
273 + 20
Pressure ratio = —0.3+ 0.1— = 0.8
0.4 + 0.1
Based on the Graph (1), the flow rate ratio is going to be 0.7 if it is read with a pressure ratio of 0.8 and a flow ratio of b = 0.3.
Hence, flow rate = Max. flow rate x flow rate ratio = 600 x 0.7 = 420 [dm3/min (ANR)]
1
0.9 b = 0.1
0.8 0.2
0.7 0.3
0.6 0.4
0.5
0.5
0.6
0.4
0.3 P1 Equipment P2
0.2 C, b Q
0.1
00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Pressure ratio (P2 + 0.1) / (P1 + 0.1)
Graph (1) Flow characteristics line
(4) Test method
Pipe the text equipment to the text circuit shown in Fig. (1). Keep the upstream pressure at a certain constant level above
0.3MPa. First measure the maximum flow rate in saturation. Then, measure the flow rate, upstream pressure and downstream
pressure each at 80%, 60%, 40% and 20% points of the flow rate. Calculate the sonic conductance C from the maximum flow
rate. Also substitute other data for variables in the formula for subsonic flow and obtain the critical pressure rate b by averaging
the critical pressure rates at those points.
Pressure control
equipment
ød3 3d1
Pressure gauge or
pressure convertor
Thermometer
Differential pressure gauge or
differential pressure converter
3d3 Flow control valve
Air supply Filter
Shut off
valve
10d3
Flow meter
10d1 3d1 10d2
3d2
Pipe for measuring
temperature
Equipment
for test
Pipe for measuring Pipe for measuring
pressure in the
pressure in the
upstream side
downstream side
Fig. (1) Test circuit based on ISO 6358, JIS B 8390
Front matter 2

5 Page





VXF22 arduino
Applicable Fluid Check List
Single Unit Series VX31/32/33
All Options (Single Unit)
Option
symbol
Seal
material
Main valve
poppet
Fixed
Seals
Standard NBR NBR
Body material
/Shading coil
material
Guide pin
material
Coil
insulation
type
Note
A
B
FKM
EPDM
FKM
EPDM
Brass (C37)
PPS
B
C FFKM PTFE
D
E
FKM FKM Brass (C37)/
EPDM EPDM Copper
Stainless
steel
H
G NBR NBR
H
J
FKM FKM
EPDM EPDM
Stainless
steel
PPS
K FFKM PTFE
Stainless steel
B
Oil free
M FKM FKM
PPS
Non-leak, Oil free
N FKM FKM
P
Q
EPDM
EPDM
Stainless
steel/Silver
FFKM PTFE
Stainless
steel
S
FFKM
PTFE
Brass (C37)/
Copper
H
Steam
(Max. 183°C)
V FKM FKM Brass (C37) PPS
B Non-leak, Oil free
“K”, “M”, “V” options are for non-lube treatment.
Fluid Name and Option (Single Unit)
Fluid (Application)
Option symbol
and body material
Brass Stainless
(C37) steel
Caustic soda (25% )
J
Gas oil
AH
Silicon oil
AH
Steam system
(Steam) (Max. 183°C)
SQ
Steam system
(Condensation) (Max. 99°C)
E
P
Vacuum system (for pad) Standard
Medium vacuum
(up to 0.1 Pa.abs)
VM
Perchloroethylene
AH
Helium
VM
Non-leak (10–6Pa·m3/s)
V
M
Heated water (Max. 99°C) E
P
Note 1) The leakage amount (10–6 Pa·m3/s) of “V”, “M” options
are values when differential pressure is 0.1 MPa.
Note 2) If using for other fluids, contact SMC.
Manifold Series VVX31/32/33
All Options (Manifold)
Option
symbol
Seal
material
Main valve Fixed
poppet seals
Standard NBR NBR
Body material
/Shading coil
material
Guide pin
material
A FKM FKM Brass (C37) PPS
B EPDM EPDM
D FKM FKM Brass (C37)/ Stainless
E EPDM EPDM Copper
steel
V FKM FKM Brass (C37) PPS
Aluminum is the only available material for the manifold base.
Coil
insulation
type
Note
B
H
B Non-leak, Oil free
Fluid Name and Option (Manifold)
Fluid (Application)
Option symbol
Gas oil
A
Silicon oil
A
Vacuum system (for pad)
Standard
Medium vacuum
(up to 0.1 Pa.abs)
V
Perchloroethylene
A
Helium
V
Non-leak (10–6Pa·m3/s)
V
Note 1) The leakage amount (10–6 Pa·m3/s) of “V” options are
values when differential pressure is 0.1 MPa.
Note 2) If using for other fluids, contact SMC.
Front matter 8

11 Page







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