12V DC solenoid valve for liquids, normally closed, ideal for aquariums and Arduino

The solenoid valve is designed to work with pressures from 0.02 to 0.8 MPa (approximately 0.2 to 8 bar). This covers most domestic and small-scale hydroponics and aquarium applications, which generally operate between 0.05 and 0.5 MPa. Maximum flow depends on the system, but the 1/2'' connectors allow typical water flow without significant restriction up to around 10 L/min at maximum pressure.

The coil uses 4.8 mm Faston terminals (female) for 12VDC and should be operated with a stable, preferably regulated power supply. Consumption is 0.4 A (4.8 W). If kept energised for long periods, the surface temperature may rise to 40–50 °C, which is normal for this type of solenoid valve and not a risk if adequately ventilated.

Generally, the housing is made from ABS plastic and the internal components from stainless steel/steel with synthetic rubber seals. These materials are compatible with drinking water, hydroponic solutions and non-corrosive liquids at room temperature (60°C max recommended). For aggressive or acidic liquids, specific compatibility should be checked.

It is recommended to install the valve in a horizontal position, with the filter facing the inlet, and always before the equipment to be protected. The integrated impurity filter should be cleaned periodically, and overpressure or solid debris that could block the mechanism should be avoided. This maximises its service life, estimated at more than 100,000 open/close cycles under normal conditions.

This model operates at low voltage (12VDC), which reduces the risk of electric shock and makes integration with controllers such as Arduino easier. By comparison, 220V AC models require greater care when handling. In addition, its NC (normally closed) type ensures that, in the event of a power cut, the flow stops, unlike NO models, which allow flow. The choice depends on safety, compatibility and the required control mode.

It is used to control liquid flow in systems such as aquariums, hydroponics and Arduino projects, opening or closing with a 12V DC electrical signal.

Yes, this solenoid valve can be easily integrated into Arduino projects to control liquid flow using electrical signals.

It is designed for clean liquids and systems where blockages need to be avoided, thanks to its built-in filter.

It can withstand a maximum pressure of 0.8 MPa according to the manufacturer's specifications.

It is installed using standard 1/2" threads on the inlet and outlet, making it easy to integrate into existing pipes or systems.