Water valve is a kind of water industry product, often used in domestic water supply, fire protection system and industrial water supply system. Used to control flow, water level, etc. At present, more liquid level control valves are used in the market. The liquid level regulating valve is also called water level control valve. It is mainly composed of regulating valve, control instrument and liquid level sensor. The liquid level regulating valve can be divided into: Pneumatic liquid level regulating valve and electric liquid level regulating valve. The working principle of the two models is to receive the water level signal transmitted by the level gauge to the control instrument.
The purpose is to control the water level and ensure that the water level does not exceed or fall below the target value. The liquid level regulating valve can be divided into a water inlet valve and a drain valve according to the operating conditions. The water inlet valve is to add water to the pool when the water level is lower than the target value, and the valve is closed when the target value is reached; the drain valve is to drain the water level higher than the target value. The valve closes at the target value.
For the water level monitoring in the intelligent water valve system, we recommend installing a photoelectric liquid level switch. Its working principle mainly uses an infrared light emitting diode and a photoelectric receiver. The light from the light-emitting diodes is directed into a prism on top of the sensor. When the tip is in the air, infrared light is internally reflected around the tip of the phototransistor, providing a strong optical coupling between the two. When the sensor tip is immersed in the liquid, infrared light escapes from the tip, causing the amount of light from the phototransistor to decrease, which causes the output state to change.
At present we recommend EPT-FS-IR1902D, the liquid level control switch provides single point liquid level detection, TTL signal output. The design sensor contains an infrared emission source and a detector, and the installation position is accurate to ensure that the two achieve good optical coupling in the air. When the tapered end of the sensor is immersed in liquid, infrared light will be transmitted out of the tapered surface, and the intensity of the light reaching the detector will be weakened.