Nominal Size Selection; Installation; Piping Example - Yoshitake DP-200 Series Manual

5.2 Nominal size selection

 Cv value calculation formula
<Liquid>
. 0 365
Cv
=
∆
<Air>
P
>
When
2
P
≤
When
2
Cv: Cv value of each nominal size
Q: Max. gas flow rate [m
V: Max. liquid flow rate [m
P : Inlet pressure [MPa ∙ A]
1
P : Outlet pressure [MPa ∙ A]
2
 Cv value
Nominal size
DP-200 ・ 200 Ｆ
● Cv values in parentheses are values when differential pressure is 0.01 MPa or less.

6.1 Piping example

Pressure
gauge
Inlet
* Differential pressure of at least 0.1 MPa is required to actuate the product when the coil is set sideways.
* Use the stop valves at the inlet and the outlet of the product at full open condition.
V G
P
P
Q
1
Cv
=
2
2940
Q ( 273
P
1
Cv
=
2 2550
3
/h (standard condition)]
3
/h]
10A
3
(1.2)
Stop
valve
Strainer
( 273 ) t G
+
P P ( P )
∆ +
1 2
) t G
+
P
1
∆ P: P – P
1
G: Specific gravity (relative to air for gas,
or relative to water for liquid)
15A 20A 25A
4 7.5 10
(1.7) (3.2) (4.6)

6. Installation

Bypass stop valve
Pressure gauge
Solenoid valve
DP-200
8
[MPa]
2
32A 40A 50A
14 17 24
(5.5) (6.5) (9.5)
Pressure
Stop
valve
gauge
Outlet
■ EPDT-266c ■