DFRobot
Solenoid Valve-DN20
A 12V DC motorised solenoid valve with a DN20 (20 mm) bore, designed for controlling water flow in automated projects. The valve integrates a DC motor with a...
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A 12V DC motorised solenoid valve with a DN20 (20 mm) bore, designed for controlling water flow in automated projects. The valve integrates a DC motor with a metal reduction gearbox, providing high torque and low noise operation. It withstands up to 1.0 MPa static pressure.
The valve has three control wires: connect the blue wire to positive to open, the red wire to positive to close, and the yellow wire to ground. If power is removed, the valve holds its current position and can also be operated manually.
Key Features
- Motorised Control – DC motor with metal reduction gearbox for reliable open/close operation
- Three-Wire Interface – Blue (open), red (close), yellow (ground)
- Holds Position – Maintains current state when powered off, with manual override
- Sealed Motor – Waterproof design for reliable operation
- Anti-EMI – Electromagnetic interference shielding
Specifications
- Bore Size – DN20 (20 mm / 0.79")
- Rated Voltage – 12V DC
- Rated Current – 100 mA
- Rated Power – 2W max
- Valve Pressure – 1.0 MPa
- Torque – 30–60 kg·cm
- Insulation Resistance – >20 MΩ
- Operating Temperature – –10°C to +50°C
Wiring
- Blue wire – Connect to +12V to open valve
- Red wire – Connect to +12V to close valve
- Yellow wire – Ground (shared)
Ideal For
- Automated irrigation and agriculture
- Smart home water control
- Aquaculture and fisheries
- Arduino and Raspberry Pi water management projects
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- electromagnetic interference
- Electromagnetic interference (EMI) is unwanted electrical noise from nearby devices, cables, or radio signals that can disturb the signals carried in a wire or circuit. Shielding helps reduce this noise, which matters because cleaner signals make data and communication links less prone to errors and dropouts.
- kg·cm
- A torque unit often used for hobby servos, meaning how many kilograms of force the servo can hold at a 1 cm arm length. A higher kg·cm rating means the servo can move or hold heavier loads, but power supply current needs may also increase.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- Relay module
- A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.
- Torque
- A twisting force that causes something to rotate, usually measured in newton-metres or kilogram-centimetres. It matters when choosing motors, servos, gears, and tools because higher torque is needed to lift heavier loads, turn larger wheels, or move mechanisms without stalling.
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