Yoshitake DP-10 pilot operated piston type solenoid valve is a compact, lightweight, and high-reliability valve featuring excellent performance on fluid control. It is mainly used for steam, air, cold and hot water, and oil. Horizontal and vertical installation is available.

Features

• Excellent performance on fluid control, mainly used for steam.
• Compact, lightweight and large capacity.
• Horizontal and vertical installation is available.

Specifications

Model	DP-10
Application	Steam, Air, Cold and hot water, Oil (20 cSt or less)
Working pressure	0.05-1.0 MPa (unusable under vacuum)
Min. differential pressure	0.05 MPa (0.1 MPa or more is required for vertical installation)
Valve seat leakage	50 mL/min (at the time of air pressure 0.6 MPa)
Max. temperature	180℃
Operation	Normally closed
Material (Body)	Cast bronze
Material (Piston)	Stainless steel
Material (Valve disc)	PTFE
Connection	JIS Rc screwed

Dimensions and Weights

Nominal size	d	L (mm)	H (mm)	H1 (mm)	Weight (kg)
10A	Rc 3/8	70	119	14.5	1.2
15A	Rc 1/2	70	119	14.5	1.2
20A	Rc 3/4	80	126	17.5	1.4
25A	Rc 1	95	133	21.0	1.8
32A	Rc 1-1/4	110	155	26.0	2.6
40A	Rc 1-1/2	120	162	29.5	3.2
50A	Rc 2	140	177	36.5	5.1

Operation

Opening Operation

When the power is turned ON, the coil is magnetized and the plunger is sucked up, thereby opening the pilot valve. The pressure at the upper part of the valve (diaphragm) flows to the outlet side via the pilot port, causing a pressure drop. The valve (diaphragm) is then pushed up by the inlet pressure, and the valve is opened.

Closing Operation

When the power is turned OFF, the plunger is pushed down by a pin/kick spring and dead weight, thereby closing the pilot valve. The inlet pressure is introduced through the bleed port to the upper part of the valve (diaphragm), thereby equalizing the inlet pressure. The valve (diaphragm) is then pushed down and closed by the pin/kick spring and the valve spring.

Installation and Wiring

Installation Cautions

• For piston type solenoid valve, the minimum differential pressure between inlet and outlet side must be more than 0.05MPa.
• Vertical or horizontal installation is possible, but the coil must be installed above the horizontal level.
• When using less than 0.1MPa pressure, the solenoid valve should be installed horizontally with the coil up.
• Install a strainer (Recommendation: 80-100mesh) at the valve inlet side.

Wiring Method

Wiring differs according to the voltage, AC100V or 200V (AC110V or 220V/AC120 or 240V). Wire the coil according to the instruction on the label attached to the coil.

• Use electric wires which have a core of 0.75mm² or more.
• Use a fuse (2 to 3A) to protect the electric circuit. Use a circuit protector as follows if the valve is used in a fuel supply system:
  • Rating voltage 100V: 0.5A circuit protector
  • Rating voltage 200V: 0.3A circuit protector

Maintenance

Maintenance Procedure

Before disassembling, completely discharge internal pressure from the valves, lines, and cool the valves down to a level where you can touch it with bare hands. Re-assembly should occur in the reverse order of the disassembly procedure. When assembling the product, replace the gasket with a new one.

Disassembly Drawing