The Yoshitake DP-200 series is a pilot-operated diaphragm solenoid valve designed for automatic on-off control of fluids, including cold and hot water, air, nitrogen gas, carbon dioxide, argon, and oils (up to 20 cSt). It features a cast bronze body and NBR diaphragm, providing a zero-leakage seal for reliable shut-off.

The DP-200 provides a screwed JIS Rc connection, while the DP-200F offers a flanged JIS 10K FF connection. Both are available in normally closed configurations and operate at working pressures from 0 to 1.0 MPa.

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 is supported (within 90 degrees from the upward position of the coil).
• The DP-200-N can be used as a pilot solenoid valve for a constant water level valve of 65A and larger.

Specifications

Model	DP-200, DP-200-N	DP-200F, DP-200F-N
Normally closed	10A-50A	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 set sideways)	0 MPa (0.1 MPa or more is required if the coil set sideways)
Allowable valve seat leakage	None (by confirming pressure gauge visually)	None (by confirming pressure gauge visually)
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 installation (within 90 degrees from upward position of the coil)	Vertical or horizontal installation (within 90 degrees from upward position of the coil)
Body Material	Cast bronze / Bronze (NPb-treated for N models)	Bronze / Bronze (NPb-treated for N models)
Diaphragm Material	NBR	NBR
Connection	JIS Rc screwed	JIS 10K FF flanged

INFO

Available with rubber material FKM for the diaphragm. Maximum temperature: 90°C (only for DP-200, DP-200F). Model numbers of the products complying with the Japanese Water Works Law are DP-200-N and DP-200F-N.

Coil Specifications

Rated voltage	AC 100 / 200 V or AC 110 / 220 V selective type (50/60 Hz common)
Allowable fluctuation	Rated voltage -5% to +10%
Insulation class	Insulation class H
Protective structure	Dust tight, Splash proof
Ingress protection code	IP64 (JIS C0920)
Withstand voltage test	1500 V/min

Dimensions and Weights

DP-200, 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, 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, to open 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 force of the kick spring, to close the pilot valve. The pressure at the upper part of the diaphragm rises due to the incoming inlet pressure from the bleed port which is communicated with the inlet. With the support of the kick spring, this makes the diaphragm 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 (standard condition). Since this intersection point (B) lies between nominal sizes 20A and 25A, select the larger one, 25A.

For Liquid

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

WARNING

• The product cannot be used as an emergency shutoff valve.
• The product is not explosion-proof. Do not use it in an area where explosive gases accumulate.
• Ensure the differential pressure between the inlet and the outlet is 0.1 MPa or more when installing the product with the coil set sideways.
• Make sure to connect a strainer (80–100 mesh) to the inlet of the product.
• Do not apply insulation to the solenoid coil.