Yoshitake DP-18 is an ultra-high performance diaphragm-type solenoid valve featuring a stainless steel body and JIS 10K FF flanged connection. Designed for excellent corrosion resistance, it is suitable for air, cold and hot water, and oil.

INFO

The DP-18 series supports both horizontal and vertical installation. For vertical installation, a minimum differential pressure of 0.1 MPa or more is required.

Features

• Outstanding corrosion resistance ensured by stainless steel wetted parts.
• Can be installed horizontally and vertically.
• Available with FKM (diaphragm) and terminal box (made of resin) options.

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	None (by confirming pressure gauge visually)
Max. temperature	60°C
Operation	Normally closed (DP-18, DP-18D) Normally opened (DP-18C, DP-18CD)
Material (Body)	Stainless steel
Material (Valve)	NBR (diaphragm)
Connection	JIS 10K FF flanged

Coil Specifications

Rated voltage	AC100/200V AC110/220V (50/60 Hz common)	DC24V
Voltage fluctuation tolerance	Rated voltage ±10%	Rated voltage ±10%
Rated current	0.42/0.21 A (100/200V) 0.38/0.19 A (110/220V)	1.13 A
Starting current	1.64/0.82 A (100/200V) 1.48/0.74 A (110/220V)	-
Insulation type	Class H	Class H
Protection structure	Dust-proof, Splash-proof	Dust-proof, Splash-proof
Degree of protection	IP64	IP64
Insulation resistance	More than 50 MΩ / 500V megger	More than 50 MΩ / 500V megger
Anti-voltage test	1500 V/min	1500 V/min

Dimensions and Weights

INFO

The DP-18 series utilizes a welded flanged structure.

DP-18 (AC Coil, Normally Closed)

Nominal size	d	L (mm)	H (mm)	H1 (mm)	Weight (kg)
15A	15	120	142.5	47.5	2.6
20A	20	130	149.0	50.0	3.2
25A	25	145	165.0	62.5	4.7
32A	32	160	192.0	67.5	6.5
40A	40	170	198.0	70.0	7.2
50A	50	195	213.0	77.5	9.9

DP-18C (AC Coil, Normally Opened)

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

DP-18D (DC Coil, Normally Closed)

Nominal size	d	L (mm)	H (mm)	H1 (mm)	Weight (kg)
15A	15	120	157	47.5	3.4
20A	20	130	164	50.0	4.0
25A	25	145	180	62.5	5.5
32A	32	160	207	67.5	7.3
40A	40	170	213	70.0	8.0
50A	50	195	228	77.5	10.7

DP-18CD (DC Coil, Normally Opened)

Nominal size	d	L (mm)	H (mm)	H1 (mm)	Weight (kg)
15A	15	120	205	47.5	3.6
20A	20	130	212	50.0	4.2
25A	25	145	228	62.5	5.7
32A	32	160	255	67.5	7.5
40A	40	170	261	70.0	8.2
50A	50	195	276	77.5	10.9

Nominal Size Selection Charts

Selection Chart (For Air)

How to use the chart: 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.

Selection Chart (For Water)

How to use the chart: 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, first find the intersection point (a) of the differential pressure before and after 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.