Datasheet

Front matter 7
Flow Characteristics
Note) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to
front matter pages 1 to 6.
For Air
How to read the graph
The sonic range pressure to generate a flow rate
of 100
l/min (ANR) is
P1 ≈ 0.1 MPa for a ø3 orifice (VX313),
P1 ≈ 0.23 MPa for a ø2.2 orifice (VX312), and
P1 ≈ 0.55 MPa for a ø1.5 orifice (VX311).
How to read the graph
When a water flow of 2 l/min is generated,
P ≈ 0.033 MPa for a ø3 orifice (VX313),
P ≈ 0.088 MPa for a ø2.2 orifice (VX312), and
P ≈ 0.31 MPa for a ø1.5 orifice (VX311).
For Water
Downstream pressure of valve (P
2
) MPa
Flow rate Q l/min (ANR)
Flow rate Q l/min
Pressure differential P = (P
1
– P
2
) MPa