The Yoshitake DP-200-N series pilot-operated solenoid valves are designed for automatic on-off control of fluid flow. Approved by the Japanese Water Works Association (JWWA), these valves feature a synthetic rubber valve part that ensures zero leakage. They effectively reduce water hammer shocks and shorten closing times. The DP-200-N can be used as a pilot solenoid valve for constant water level valves of 65A and larger.

Features

• The shock of water hammer is reduced, and the closing time of the valve is shortened.
• Zero leakage due to synthetic rubber used for the valve part.
• Usable for a wide pressure range of 0–1.0 MPa (0.1–1.0 MPa if the coil is set sideways).
• Horizontal and vertical installation (within 90 degrees from the upward position of the coil).
• DP-200-N can be used as a pilot solenoid valve for constant water level valves of 65A and larger.

Specifications

Model	DP-200-N	DP-200F-N
Normally Closed	Yes	Yes
Nominal Size	10A–50A (15A-50A for F)	15A–50A
Structure	Pilot-operated diaphragm type	Pilot-operated diaphragm type
Application	Cold and Hot water, Air, N2 gas, CO2 gas (dry), Ar gas, Oil (20 cSt or less)	Cold and Hot water, Air, N2 gas, CO2 gas (dry), Ar gas, Oil (20 cSt or less)
Working Pressure	0–1.0 MPa (Unusable under vacuum)	0–1.0 MPa (Unusable under vacuum)
Min. Differential Pressure	0 MPa (0.1 MPa or more is required if the coil is set sideways)	0 MPa (0.1 MPa or more is required if the coil is set sideways)
Allowable Valve Seat Leakage	None (by confirming pressure gauge visually)	None
Temperature Range	5–60°C (no freeze condition)	5–60°C (no freeze condition)
Ambient Temperature	50°C or less (no freeze condition)	50°C or less (no freeze condition)
Installation Posture	Vertical or horizontal (within 90 degrees from upward position)	Vertical or horizontal
Material (Body/Valve)	Bronze (NPb-treated)	Bronze (NPb-treated)
Material (Diaphragm)	NBR	NBR
Connection	JIS Rc screwed	JIS 10K FF flanged

INFO

Available with rubber material FKM for the diaphragm. Max. temperature: 90°C (only for standard DP-200 and DP-200F). When using the solenoid valve to pilot piping of a constant water level valve (up to 50A), direct type DD-3-8N is recommended.

Coil Specifications

Item	AC 100 / 200 V selective type	AC 110 / 220 V selective type
Frequency	50 / 60 Hz common	50 / 60 Hz common
Allowable Fluctuation	Rated voltage –5% to +10%	Rated voltage –5% to +10%
Rated Current	0.42 / 0.21 A	0.38 / 0.19 A
Starting Current	1.64 / 0.82 A	1.48 / 0.74 A
Insulation Class	Class H	Class H
Protective Structure	Dust tight, Splash proof	Dust tight, Splash proof
Ingress Protection Code	IP64 (JIS C0920)	IP64 (JIS C0920)
Insulation Resistance	50 MΩ and more / 500 V megger	50 MΩ and more / 500 V megger
Withstand Voltage Test	1500 V/min	1500 V/min

Dimensions and Weights

DP-200-N (JIS Rc screwed)

Nominal Size	d	L	H1	H	Weight (kg)
10A	Rc 3/8	70	14.5	114	1.1
15A	Rc 1/2	70	14.5	114	1.1
20A	Rc 3/4	80	17.5	121	1.3
25A	Rc 1	95	21.0	128	1.7
32A	Rc 1-1/4	110	26.0	150	2.5
40A	Rc 1-1/2	120	29.5	157	3.1
50A	Rc 2	140	36.5	172	5.0

DP-200F-N (JIS 10K FF flanged)

Nominal Size	d	L	H1	H	Weight (kg)
15A	15	120	47.5	147	2.7
20A	20	130	50.0	153	3.3
25A	25	145	62.5	169	4.8
32A	32	160	67.5	192	6.6
40A	40	170	70.0	198	7.3
50A	50	195	77.5	213	10.0

Operation

(1) Opening operation (Power ON)

When the power is turned ON, the coil is excited and pulls up the plunger, opening the pilot valve. Next, the pressure at the upper part of the diaphragm drops since it flows to the outlet through the pilot port. The diaphragm is then lifted up to the open position by the inlet pressure.

(2) Closing operation (Power OFF)

When the power is turned OFF, the coil excitation is canceled and the plunger drops down by the force of the kick spring, closing the pilot valve. The pressure at the upper part of the diaphragm rises due to the incoming inlet pressure from the bleed port which communicates with the inlet. With the support of the kick spring, the diaphragm is pushed down to the closed position.

Nominal Size Selection

Nominal Size Selection Chart (For Air)

Nominal Size Selection Chart (For Liquids/General)

Cv Values by Nominal Size

Nominal Size	10A	15A	20A	25A	32A	40A	50A
Cv Value	3 (1.2)	4 (1.7)	7.5 (3.2)	10 (4.6)	14 (5.5)	17 (6.5)	24 (9.5)

Cv values in parentheses are values when the differential pressure is 0.01 MPa or less.

Installation

Piping Example

Wiring Method

1. Wiring method differs between the voltages, AC 100/110 V and 200/220 V. Bind the lead wires of the coil according to the instruction on the label attached to the coil.
2. Use electric wires which have a core of 0.75 mm² or more.
3. Install a fuse (3A) to protect the electric circuit. In a fuel supply system, install a 0.5A circuit protector for 100/110V or a 0.3A protector for 200/220V.

Installation Precautions

• When installing the product with the coil set sideways, make sure that the differential pressure is 0.1 MPa or more.
• Though the product can be installed at any angle between vertical and horizontal, it cannot be installed upside-down.
• Connect a strainer (80–100 mesh) to the inlet of the product.
• If the product is used outdoors, place protective covers or guards above the product in order to avoid exposure to water.
• Do not apply insulation to the solenoid coil; this may cause burnout.

Maintenance and Disassembly

Conduct daily and periodic inspections in order to maintain optimal performance. Disassembly and maintenance must be done by experienced professionals.

Periodic replacement of parts:

• Diaphragm complete set: Per 150,000 actuations
• Coil: Per 4 years

Reassembly Guidelines

1. Insert the diaphragm complete set with the kick spring into the cover complete set.

2. Push the diaphragm and check that it moves smoothly. If the kick spring drops off, it will not operate normally.

3. When installing the cover complete set to the body, insert the spring pin into the bleed port (pin hole).