Datasheet

For Air
Downstream pressure of valve (P2) [MPa]
Upstream pressure of valve
P
1
≈ 1.0 MPa
1.0
0.8
0.6
0.4
0.2
0
Subsonic
Sonic
Flow rate
Q [L/min (ANR)]
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
50 100 150 200 250 300 400
350
100 200 300 400 500
1,000
400 600
600
800 1,000 1,200
200 1,400
350 700
400 700
1,000 1,300
500 700
700
1,000
How to read the graph
The sonic range pressure to generate a flow rate of 400 L/min (ANR) is P1 ≈ 0.2 MPa for a ø4 orifice and P1 ≈ 0.58 MPa for a ø3 orifice.
ø2
ø3
ø4
ø5
ø7
ø8
ø10 (Connection: 1/4)
ø10 (Connection: 3/8, 1/2)
Series VX21/22/23
Flow-rate Characteristics 1
Note) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to pages 30 through to 33.
For Water
Flow rate
Q
[L/min]
30
20
10
5
4
3
2
1
0.001 (0.0018) (0.0054) 0.01
(0.013)
0.05 (0.07)
0.1
Pressure differential Δ
P = (P1 − P2) [MPa]
How to read the graph
When a water flow of 2 L/min is generated, ΔP ≈ 0.013 MPa for a valve with ø3 orifice.
ø4
,
ø5
ø8
ø7
ø3
ø2
ø10
Critical
pressure
35