Yoshitake DP-100-D and DP-100F-D are pilot-operated piston type solenoid valves equipped with a DC 24V coil. Designed with a robust stainless steel (SCS14A) body and piston, and a PTFE valve disc, these normally closed valves provide reliable zero-leakage performance under standard conditions. They are highly versatile, suitable for a wide range of fluids including steam, air, cold and hot water, nitrogen gas, dry carbon dioxide, argon gas, and light oils (20 cSt or less).

These valves support both horizontal and vertical installation (within 90 degrees from the upward position of the coil) and operate efficiently across a pressure range of 0 to 1.0 MPa. The DP-100-D features a JIS Rc screwed connection, while the DP-100F-D offers a JIS 10K FF flanged connection.

Features

1. DC voltage piston type solenoid valve.
2. Horizontal and vertical installation is available.

DP-100-D (Screwed type)

DP-100F-D (Flanged type)

Specifications

Model	DP-100-D	DP-100F-D
Nominal size	10A-50A	15A-65A
Structure	Pilot-operated piston type	Pilot-operated piston type
Application	Steam, Air, Cold and hot water, N2 gas, CO2 gas (dry), Ar gas, Oil (20 cSt or less)	Steam, Air, Cold and hot water, 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 (0.03 MPa or more is required for vertical installation)	0 MPa (0.03 MPa or more is required for vertical installation)
Allowable valve seat leakage	50 mL/min under standard conditions (at air pressure of 0.6 MPa)	50 mL/min under standard conditions (at air pressure of 0.6 MPa)
Temperature range	5-180°C (no freeze condition)	5-180°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 installation (within 90 degrees from upward position of the coil)	Vertical or horizontal installation (within 90 degrees from upward position of the coil)
Material (Body/Piston)	Stainless steel (SCS14A)	Stainless steel (SCS14A)
Material (Valve disc)	PTFE	PTFE
Connection	JIS Rc screwed	JIS 10K FF flanged

Specifications of Coil

Item	Specification
Rated voltage	DC 24 V
Nominal size	10-25A / 32-65A
Rated current	1.34 A (10-25A) / 1.14 A (32-65A)
Allowable fluctuation	Rated voltage -5% to +10%
Insulation class	Insulation class H
Protective structure	Dust tight, Splash proof
Ingress protection code	IP64 (JIS C0920)
Insulation resistance	50 MΩ and more / 500 V megger
Withstand voltage test	1500 V/min

INFO

Available with a terminal box upon request.

Dimensions and Weights

DP-100-D (Screwed)

Nominal size	d	L	H1	H	Weight (kg)
10A	Rc 3/8	70	14.5	143	2.2
15A	Rc 1/2	70	14.5	143	2.2
20A	Rc 3/4	80	17.5	147	2.3
25A	Rc 1	95	21.0	151	2.7
32A	Rc 1-1/4	110	26.0	194	4.3
40A	Rc 1-1/2	120	29.5	200	5.2
50A	Rc 2	140	36.5	209	6.8

DP-100F-D (Flanged)

Nominal size	d	L	H1	H	Weight (kg)
15A	15	120	47.5	177	3.5
20A	20	130	50.0	180	4.0
25A	25	145	62.5	193	5.3
32A	32	160	67.5	235	8.1
40A	40	170	70.0	241	9.2
50A	50	195	77.5	250	11.7
65A	50	198	87.5	260	13.5

Nominal Size Selection Charts

For Steam

How to use the chart: When selecting the nominal size of a solenoid valve whose inlet pressure (P1), outlet pressure (P2), and steam (saturated steam) flow rate (W) are 0.7 MPa, 0.5 MPa, and 400 kg/h, respectively, first find intersection point (a) of P1 = 0.7 MPa and P2 = 0.5 MPa. Trace down vertically from this intersection point (a) to find intersection point (b) with W = 400 kg/h. Since this intersection point (b) lies between nominal sizes 15A and 20A, select the larger one, 20A.

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 0.5 MPa, 0.35 MPa, and 150 L/min, respectively, first find intersection point (a) of the differential pressure before and after the valve [ΔP = 0.5 - 0.35 = 0.15 MPa] and V = 150 L/min. Since this intersection point (a) lies between nominal sizes 20A and 25A, select the larger one, 25A.

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 0.4 MPa, 0.3 MPa, and 300 m³/h (standard condition), respectively, first find intersection point (a) of P1 = 0.4 MPa and P2 = 0.3 MPa. Trace down vertically from this intersection point (a) to find intersection point (b) with Q = 300 m³/h (standard condition). Since this intersection point (b) lies between nominal sizes 15A and 20A, select the larger one, 20A.

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 valve [7] drops since it flows to the outlet through the pilot port [5]. The valve [7] is then lifted up to 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 force of the kick spring [3], to close the pilot valve [4]. The pressure at the upper part of the valve [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 valve [7] pushed down to closed position.

Installation and Wiring

WARNING

Electric wiring work must be done by experienced professional.

1. If there is a risk of death, bodily injury or damage to property at the time of malfunction of the product, be sure to install a suitable safety device that controls fluid flow interception/release or sounds an alarm.
2. The product cannot be used as an emergency shutoff valve.
3. The product is not explosion-proof. Do not use it in the area or ambience where explosive gases accumulate.
4. Connect the cables only after confirming that no power is supplied.
5. Connect the cables according to the instructions after confirming the rated voltage.
6. Do not supply electric power to the coil while it is detached from the valve.

Piping Recommendations

• When using the product under conditions where the outlet pressure can accidentally become higher than the inlet pressure, install a check valve at the outlet side to prevent backflow.
• If the product is used in a steam line and negative pressure generates at its outlet side when closed, install a vacuum breaker at the outlet side.
• When using the product in a steam line, install a steam trap in the line and avoid condensate accumulation at the inlet side.
• When an automatic control valve is installed at the inlet or outlet side, keep more than 3 meters between them to prevent malfunction due to differential pressure fluctuation.

Piping Example

• Differential pressure of at least 0.03 MPa is required to actuate the product when the coil is set sideways.
• Use the stop valves at the inlet and outlet of the product at full open condition.

Wiring Method

1. In order to prevent disconnection or insulation failure, avoid unnecessarily pulling the lead wires or subjecting them to excessive load while wiring or use.
2. Use electric wires which have a core of 0.75 mm² or more.
3. Install a fuse (3A) to protect the electric circuit. If used in a fuel supply system, install a circuit protector (Rated current: 2A for DC 24V).
4. DC coil has two lead wires (red and black). Connect each of them to + and – (the correspondence relation is undecided).

Maintenance

WARNING

Disassembly and maintenance must be done by experienced professional or valve manufacturer.

1. Confirm that no power is supplied before disassembling or maintenance.
2. Completely discharge the pressure inside of the product, line and equipment before disassembling or maintenance and cool down the product till it can be touched with bare hands in the case of high-temperature fluid.
3. Do not supply electric power to the coil while it is detached from the valve.

Periodic Replacement of Parts

Replace the following parts to maintain optimal performance:

• Piston ring, Inner ring, Valve, Plunger: Per the earlier of 500,000 actuations or 2 years. (Replaced together as a valve complete set. Replace the cover gasket at the same time).
• Coil: Per 4 years.

Troubleshooting

Trouble	Cause	Remedy
The valve does not open (Fluid does not flow)	1. Strainer at inlet is clogged. 2. Plunger assy is stuck with foreign substances. 3. Pilot valve seat portion gets stuck. 4. Fluid pressure exceeds specified working pressure. 5. Fluid viscosity exceeds 20 cSt.	1. Clean the strainer. 2. Disassemble and remove foreign substances. 3. Replace the valve complete set. 4. Adjust fluid pressure. 5. Adjust fluid viscosity.
The valve does not close (Fluid flow does not stop)	1. Plunger assy or valve seat is stuck or damaged. 2. Plunger assy is stuck with foreign substances. 3. Installed in the opposite direction. 4. Bypass stop valve is kept open. 5. Differential pressure is less than 0.03 MPa (when coil is sideways).	1. Disassemble and remove foreign substances. Replace if damaged. 2. Disassemble and remove foreign substances. 3. Reinstall correctly. 4. Close bypass stop valve. 5. Adjust differential pressure or install vertically.
External leakage is observed	1. Pipe is loosened. 2. Hexagon head bolt is loosened. 3. Cover gasket is damaged.	1. Replace the cover complete set. 2. Retighten with specified torque. 3. Replace the cover gasket.

Disassembly and Exploded View

The parts name shown in the rectangle boxes are available as consumable supply.Apply lubricant agent (Recommendation: SOLVEST No.110 paste, STT Inc.) to the threaded area.