VXD2140-04T-3CR1 SMC Corporation, VXD2140-04T-3CR1 Datasheet - Page 3

• Manufacturer Part Number: VXD2140-04T-3CR1
• Description: Process Solenoid Valve, 2 port, pilot operated, 1/2 port, NC, 110VAC, conduit
• Manufacturer: SMC Corporation
• Type: Pilot Operatedr

Specifications of VXD2140-04T-3CR1

• Brand/series: VX Series
• Number Of Ports: 2
• Primary Type: Solenoid Valve
• Size, Port: 1⁄2" NPTF
• Voltage, Coil: 110 VAC
• Enclosure: Equivalent to IP65

Solenoid Valves Flow Characteristics
Front matter 3
2.2 Effective area S
(1) Standards conforming to
(2) Definition of flow characteristics
(3) Formula of flow rate
(4) Test method
Effective area S : is the cross-sectional area having an ideal throttle without friction deduced from the calculation of the pressure
JIS B 8390: 2000: Pneumatic fluid power—Components using compressible fluids—
Determination of flow rate characteristics
Equipment standards: JIS B 8373: 2 port solenoid valve for pneumatics
When
P
———— ≤ 0.5, choked flow
P
Q
When
P
———— > 0.5, subsonic flow
P
Q
Conversion with sonic conductance
S
Q
S
P
P
t
Note) Formula for subsonic flow (4) is only applicable when the critical pressure ratio
By attaching the equipment for testing with the test circuit shown in Fig. (2), discharge air into the atmosphere until the pressure
inside the air tank goes down to 0.25 MPa (0.2 MPa) from an air tank filled with compressed air of a certain pressure (0.5 MPa)
which does not go down below 0.6 MPa. At this time, measure the discharging time and the residual pressure inside the air tank
which had been left until it turned to be the normal values, and then determine the effective area
The volume of air tank should be selected within the specified range by corresponding to the effective area of the equipment being
tested. In the case of JIS B 8373, 8374, 8375, 8379, 8381, the pressure values are in parentheses and the coefficient of formula is
12.9.
S =
S
V
t
Ps
P
T
2
1 + 0.1
2 + 0.1
1 + 0.1
1
2
= 5.0 x
= 120 x
= 240 x
+ 0.1
:Air flow rate[dm
: Effective area [mm
: Upstream pressure [MPa]
: Downstream pressure [MPa]
: Temperature [°C]
: Effective area [mm
: Air tank capacity [dm
: Discharging time [s]
: Pressure inside air tank
: Residual pressure inside air tank
: Temperature inside air tank
12.1
before discharging [MPa]
after discharging [MPa]
before discharging [K]
by sonic conductance
C
—
V
t
S
S
·······································································································(5)
(
log
P
(
1
P
10
changes inside an air tank or without reduced flow when discharging the compressed air in a choked flow, from
an equipment attached to the air tank. This is the same concept representing the “easy to run through” as sonic
conductance
+ 0.1)
2
(—————)
+ 0.1) (
3
/min(ANR)], dm
Ps
P
2
]
2
+ 0.1
+ 0.1
]
————··································································(3)
273 +
P
3
JIS B 8374: 3 port solenoid valve for pneumatics
JIS B 8375: 4 port, 5 port solenoid valve for pneumatics
JIS B 8379: Silencer for pneumatics
JIS B 8381: Fittings of flexible joint for pneumatics
]
293
1
C
–
C
(2), it is the same formula when
P
t
(effective area).
2
)
C
3
——
:
293
(cubic decimeter) of SI unit is good to be described by
T
————··············································(4)
273 +
293
·················
t
Air supply
(6)
Filter
Pressure control
b
= 0.5.
equipment
Fig. (2) Test circuit based on JIS B 8390
Thermometer
Shut off
valve
Air tank
Timer (Clock)
Pressure recorder
b
is the unknown equipment. In the formula
Pressure switch
l
pressure convertor
Pressure gauge
(liter), too. 1 dm
Control
circuit
S
or
by using the following formula.
3
= 1
l
Equipment for test
Solenoid
valve
Power
supply