Yoshitake DP-200F-N pilot-operated solenoid valve is designed for automatic on-off control of cold and hot water, air, N2 gas, CO2 gas (dry), Ar gas, and light oils (20 cSt or less). Featuring a JIS 10K FF flanged connection and a bronze construction with NPb treatment, this normally closed valve integrates an NBR diaphragm to ensure zero leakage. The DP-200F-N complies with the Japanese Water Works Law (JWWA) and accommodates a working pressure range of 0 to 1.0 MPa, making it suitable for a variety of industrial fluid control applications.

INFO

Model DP-200F-N is the JWWA-approved version with flanged connections. Model DP-200-N provides JIS Rc screwed connections with JWWA approval.

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

Specification	DP-200F-N (Normally Closed)
Structure	Pilot-operated diaphragm type
Application	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)
Min. differential pressure	0 MPa (0.1 MPa or more is required if the coil set sideways)
Allowable valve seat leakage	No (by confirming pressure gauge visually)
Temperature range	5–60°C (no freeze condition)
Ambient temperature	50°C or less (no freeze condition)
Installation posture	Vertical or horizontal installation (within 90 degrees from upward position of the coil)
Body / Valve Material	Bronze (NPb-treated)
Diaphragm Material	NBR
Connection	JIS 10K FF flanged

Note: Available with rubber material FKM for the diaphragm. Max. temperature: 90°C (only for standard DP-200, DP-200F).

Coil Specifications

Item	Specification
Rated voltage	AC 100/200 V or AC 110/220 V selective type (50/60 Hz common)
Allowable fluctuation	Rated voltage –5% to +10%
Rated current	0.42 / 0.21 A (100/200V) or 0.38 / 0.19 A (110/220V)
Starting current	1.64 / 0.82 A (100/200V) or 1.48 / 0.74 A (110/220V)
Insulation class	Insulation class H
Protective structure	Dust tight, Splash proof (IP64 JIS C0920)
Insulation resistance	50 MΩ and more / 500 V megger
Withstand voltage test	1500 V/min
Removing lead wire	Conduit G 1/2 (CTG 16)

Available with a terminal box (made of plastic).

Dimensions and Weights

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

(Dimensions in mm)

Operation

Opening Operation (Power ON)

When the power is turned ON, the coil [1] is excited and pulls up the plunger [2], to open the pilot valve [4]. Next, the pressure at the upper part of the diaphragm [7] drops since it flows to the outlet through the pilot port [5]. The diaphragm [7] is then lifted up to the open position by the inlet pressure.

Closing Operation (Power OFF)

When the power is turned OFF, the coil [1] excitation is canceled and the plunger [2] drops down by the force of the kick spring [3], to close the pilot valve [4]. The pressure at the upper part of the diaphragm [7] rises due to the incoming inlet pressure from the bleed port [6] which is communicated with the inlet. With the support of the kick spring [3], this makes the diaphragm [7] pushed down to the closed position.

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, 0.3 MPa, and 600 m³/h (standard condition), respectively: first find intersection point (A) of P1 = 0.5 MPa and P2 = 0.3 MPa. Trace down vertically from this intersection point (A) to find intersection point (B) with Q = 600 m³/h. Since this intersection point (B) lies between nominal sizes 20A and 25A, select the larger one, 25A.

For Liquids

When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2), and flow rate (V) are 0.6 MPa, 0.3 MPa, and 200 L/min, respectively: first find intersection point (A) of the differential pressure before and after the valve [∆P = 0.6-0.3 = 0.3 MPa] and V = 200 L/min. Since this intersection point (A) lies between nominal sizes 20A and 25A, select the larger one, 25A.

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. In order to prevent disconnection or insulation failure, avoid unnecessarily pulling the lead wires or subjecting them to excessive load.
3. Use electric wires which have a core of 0.75 mm² or more.
4. Install a fuse (3A) to protect the electric circuit. If used in a fuel supply system, install a 0.5 A circuit protector for 100/110 V or a 0.3 A circuit protector for 200/220 V.

Installation Precautions

• Orientation: Ensure that the differential pressure is 0.1 MPa or more if installed with the coil sideways. Do not install upside-down.
• Fluid Flow: Verify the fluid flow matches the arrow marked on the product.
• Strainer: Connect a strainer (80–100 mesh) to the inlet of the product to prevent malfunction.
• Outdoors: Place protective covers or guards above the product if used outdoors to avoid exposure to water. Do not apply insulation to the solenoid coil.

Operating Procedure and Maintenance

Precaution for Operation

• Do not touch the coil with bare hands while it is energized.
• Do not touch the product with bare hands when used for hot fluid.
• Sudden application of pressure may open the valve instantly and cause leakage.

Test Working: Before performing test working, close the stop valves at both sides and remove foreign substances by flushing the bypass line. Switch the product on and off a few times without fluid to confirm the plunger's clicking sound. Then lead fluid gradually and confirm normal opening, closing, and zero leakage.

Maintenance: Disassembly and maintenance must be done by an experienced professional. Always confirm that no power is supplied and pressure is completely discharged before disassembling. Conduct daily inspections (verifying on/off operation and checking for outside leakage) to maintain optimal performance.