ITV2050-31N3S4 SMC Corporation, ITV2050-31N3S4 Datasheet - Page 28

• Manufacturer Part Number: ITV2050-31N3S4
• Description: Regulator; 1500L/min; .005-.9MPa range; 24VDC; 3/8NPT ports; 1-5VDC out
• Manufacturer: SMC Corporation

Specifications of ITV2050-31N3S4

• Pressure, Operating: 0.9 Mpa
• Size, Port: 3⁄8 "
• Temperature, Ambient: 0 to 50 °C
• Thread Type: NPT

Working Principle
q Vacuum pressure
Series ITV209„
Linearity
Pressure
Characteristics
r Diaphragm
(Atmospheric pressure)
VAC
(Vacuum pump, etc.)
VAC side pressure (Supply pressure) (kPa)
solenoid valve
–0.5
–1.0
–20
–40
–60
–80
1.0
0.5
Power supply
0
0
Input signal
0
Set point
Set point
ATM
–100
25
Input signal (% F.S.)
–80
50
Set pressure: –20 kPa
–60
75
i Control
circuit
–40
Pressure
display
100
–20
Hysteresis
Flow
Characteristics
Output signal
w Atmospheric pressure
OUT.
(Set pressure)
y Atmospheric pressure
solenoid valve
valve
–0.5
t Vacuum pressure
–10
–20
–30
–40
–50
–60
–70
–80
–90
u Pressure sensor
e Pilot chamber
0.5
–1
valve
1
0
0
0
Atmospheric
pressure
25
Flow rate (
Return
Input signal (% F.S.)
Out
50
Supply pressure: –100 kPa
50
When the input signal increases, the vacuum pressure solenoid
valve q turns ON, and the atmospheric pressure solenoid valve
w turns OFF. Because of this, VAC and the pilot chamber e are
connected, the pressure in the pilot chamber e becomes
negative and acts on the top of the diaphragm.
As a result, the vacuum pressure valve t which is linked to the
diaphragm r opens, VAC and OUT are connected, and the set
pressure becomes negative.
This negative pressure feeds back to the control circuit i via the
pressure sensor u. Then, a correct operation works until a
vacuum pressure proportional to the input signal is reached, and
a vacuum pressure is obtained which is always proportional to
the input signal.
l
Input
signal
/min(ANR))
100
75
+
–
100
t
Control
circuit
150
Working Principle
q
Vacuum
pressure
solenoid valve
w
Atmospheric
pressure
solenoid valve
Block Diagram
u Pressure sensor
Repeatability
• Exhaust flow rate of the vacuum pump
• Inlet vacuum pressure: –100 kPa
• Maximum flow rate: 132 l /min (ANR)
(When outlet flow rate is 0 l /min (ANR))
(With inlet vacuum pressure at –39 kPa)
Flow characteristics
measurement conditions
used for measurement: 500 l /min (ANR)
–0.5
–1.0
1.0
0.5
0
0
VAC.
r
Diaphragm
2
4
Count
6
Pilot valve
8
14-8-31
Set
pressure
10
F.R.L.
AV
AU
AF
AR
IR
VEX
AMR
ITV
IC
VBA
VE„
VY1
G
PPA
AL