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Restrictor
Controller
Pressure transducer
Pilot valve
(VX232AA)
VXFA2
Oscilloscope
Air tank
Vl
Piping length
Piping length
to pilot valve
Pressure transducer
Restrictor
Controller
VXF2
Oscilloscope
Air tank
Vl
Piping length
Voltage
waveform
Outlet pressure
waveform
Pressure waveform
in the tank
Δ
t
ON response time 0%
Pm x 90%
Pm (Peak pressure)
150 msec
The valve characteristics data was measured with the stated outlet piping length. The valve characteristics vary depending on the
tank capacity, air supply, set pressure, outlet conditions (nozzle size, quantity, piping length), so please use these values as a
guideline.
Note) For air operated type, the longer the piping length to the pilot
valve, the longer the ON response time will be. If the piping
length is increase even more, the valve may not open due to
piping capacity and resistance in the piping, so keep the
piping length to the pilot valve as short as possible.
Series
VXF2/VXFA2
Valve Characteristics
1. Response Time, Start-up Speed
VXF2 Type
VXFA2 Type
Measuring conditions
Test circuit
…Refer to the circuit below.
Test sample
…
VXF21A
(Port size 3/4)
VXF22A
(Port size 1)
VXF23A
(Port size 1 1/2)
VXF24A
(Port size 2)
VXF25A, B
(Port size 2 1/2)
VXF26A, B, C, D
(Port size 3)
VXF27B
(Port size 3 1/2)
VXF28B
(Port size 4)
Air tank capacity
…
VXF21 to VXF22
: 100 L
VXF23 to VXF24
: 200 L
VXF25 to VXF28
: 1000 L
Energizing time
…………150 msec
Rated voltage
……………24 VDC
Outlet piping length
……500 mm
Thread size of outlet piping
…
VXF21
: Rc3/8
VXF22
: Rc1/2
VXF23
: Rc3/4
VXF24
: Rc1
VXF25
: Rc1 1/2
VXF26
: Rc2
VXF27
: Rc2 1/2
VXF28
: Rc3
How to calculate
1. Set the tank pressure to 0.5 MPa.
2. Close the stop valve on the inlet of the tank.
3. Energize the valve and read the pressure wave
on the outlet.
Measuring conditions
Test circuit
…Refer to the circuit below.
Test sample
…
VXFA21A
(Port size 3/4)
VXFA22A
(Port size 1)
VXFA23A
(Port size 1 1/2)
VXFA24A
(Port size 2)
VXFA25A, B
(Port size 2 1/2)
VXFA26A, B, C, D
(Port size 3)
VXFA27B
(Port size 3 1/2)
VXFA28B
(Port size 4)
Air tank capacity
…
VXFA21 to VXFA22
: 100 L
VXFA23 to VXFA24
: 200 L
VXFA25 to VXFA28
: 1000 L
Energizing time
…………150 msec
Pilot valve
VX232AA (Orifice, ø5, Rated voltage 24 VDC)
Piping length to the pilot valve
500 mm, 1000 mm, 1500 mm (ø10, t = 1.5)
Outlet piping length
……500 mm
Thread size of outlet piping
…
VXFA21
: Rc3/8
VXFA22
: Rc1/2
VXFA23
: Rc3/4
VXFA24
: Rc1
VXFA25
: Rc1 1/2
VXFA26
: Rc2
VXFA27
: Rc2 1/2
VXFA28
: Rc3
How to calculate
1. Set the tank pressure to 0.5 MPa.
2. Close the stop valve on the inlet of the tank.
3. Energize the pilot valve and read the pressure wave
on the outlet.
VXF2
Test circuit
VXFA2
Test circuit
ON response time
Time required until the valve is switched after it is energized
(Time required until pressure is released to the outlet)
Start-up speed
Speed until the valve is switched after being
energized and the pressure released to the
outlet reaches 90% of the peak pressure
Start-up speed = (Pm x 0.9)/
Δ
t
[MPa/msec]
How to Read the Data
5
Summary of Contents for VXF2 Series
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