Yoshitake DP-18C is a high-performance, normally opened diaphragm-type solenoid valve featuring a stainless steel body and flanged connections. It is designed for reliable control of applications involving air, cold and hot water, and oil. The valve utilizes an AC coil and ensures zero valve seat leakage.

Features

• Outstanding corrosion resistance ensured by stainless steel wetted parts.
• Horizontal and vertical installation.

Specifications

Specification	Value
Application	Air, Cold and hot water, Oil (20 cSt or less)
Working pressure	0-1.0 MPa (unusable under vacuum)
Min. differential pressure	0 MPa (0.1 MPa or more is required for vertical installation)
Valve seat leakage	No (by confirming pressure gauge visually)
Max. temperature	60°C
Operation	Normally opened
Material (Body)	Stainless steel
Material (Valve)	NBR (diaphragm)
Connection	JIS 10K FF flanged

INFO

• Available with FKM.
• Available with a terminal box (made of resin).

Coil Specifications

Specification	Value
Rated voltage	AC100/200V or AC110/220V (50/60 Hz common)
Voltage fluctuation tolerance	Rated voltage ±10%
Rated current	0.42/0.21A (100/200V), 0.38/0.19A (110/220V)
Starting current	1.64/0.82A (100/200V), 1.48/0.74A (110/220V)
Insulation type	Class H
Protection structure	Dust-proof, Splash-proof
Degree of protection	IP64
Insulation resistance	More than 50MΩ / 500V megger
Anti-voltage test	1500V/min

Dimensions and Weights

The following dimensions apply to the DP-18C (normally opened, flanged type).

Nominal size	L (mm)	H (mm)	H1 (mm)	Weight (kg)
15A	120	205	47.5	2.9
20A	130	212	50.0	3.5
25A	145	228	62.5	5.0
32A	160	255	67.5	6.8
40A	170	261	70.0	7.5
50A	195	276	77.5	10.2

::: note DP-18 series uses a welding flanged structure. :::

Nominal Size Selection

For Air When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2), and air (20°C) flow rate (Q) are 0.5 MPa, 0.35 MPa, and 600 m³/h (standard condition), respectively, first find intersection point (a) of P1 = 0.5 MPa and P2 = 0.35 MPa. Trace down vertically from this intersection point (a) to find intersection point (b) with Q = 600 m³/h (standard condition). Since this intersection point (b) lies between nominal sizes 20A and 25A, select the larger one, 25A.

For Water When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2), and flow rate (V) are 0.7 MPa, 0.5 MPa, and 300 L/min, respectively, first find intersection point (a) of the differential pressure across the valve [ΔP = 0.7 - 0.5 = 0.2 MPa] and V = 300 L/min. Since this intersection point (a) lies between nominal sizes 25A and 32A, select the larger one, 32A.

Structural Drawing