Datasheet

Series VXD
Flow-rate Characteristics
Note) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to pages 34 through to 38.
In the area located left to the
minimum operating pressure
differential origin line in the
flow-rate characteristics table, the
minimum operating pressure is
not generated. Do not use the
product in this area as this may
cause operation failure (valve
opening failure, valve closing
failure) or damage of the valve.
Select valves with suitable size.
Warning
How to read the graph
The sonic range pressure to generate a
flow rate of 6000 L/min (ANR) is P1 ≈ 0.57
MPa for a ø15 orifice (VXD240/Port
size: 3/8) and P
1 ≈ 0.22 MPa for a ø20
orifice (VXD250/Port size: 3/4).
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
U
p
s
t
r
e
a
m
p
r
e
s
s
u
r
e
o
f
v
a
l
v
e
P
1
≈
1
.
0
M
P
a
Minimum operating pressure differential origin line
Critical
pressure
Sonic
Subsonic
2,000
2,500
4,000
5,000
6,000
7,500
8,000
10,000
5,000 10,000 15,000
5,000 10,000 15,000 20,000
1,000 2,000 3,000
1,000 2,000 3,000 4,000
Flow rate
Q [L/min (ANR)]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Downstream pressure of valve (P2) [MPa]
For Air (Orifice diameter: ø10 mm, ø15 mm, ø20 mm, ø25 mm)
ø10
ø10
ø15
ø15
ø20
ø25
Port size 1/4
Port size 3/8,1/2
Port size 3/8
Port size 1/2
Port size 3/8
Port size 1
39