Technical Applications | Ailipu Solenoid Diaphragm Dosing Pumps Provide Accurate Metering Even with Degassing Medium

When metering liquids, air bubbles and pressure fluctuations are the main reasons of inaccurate metering. Degassing media can also block the conveying process. The intelligent functions and model-based control of Solenoid diaphragm dosing pumps provide remedies for this.

During the dosing process, air bubbles may appear in the suction pipe or in the dosing pump head. This situation occurs when dosing degassing medium such as sodium hypochlorite. Due to the presence of a certain amount of gas in the dosing head, the liquid dose of conventional pumps will not meet the requirements. The most common situation is that the pump will react"air lock", i.e. not perform metering work at all.

To avoid this, the gas must be detected in time so that the necessary measures can be taken. Ideally, it should be ensured that metering is not only uninterrupted, but that the exact dose required is achieved.

Intellectualisation Ensures accurate metering

Reliable bubble detection is a prerequisite for intelligent automatic aeration. Solenoid Diaphragm Dosing Pumps draw direct conclusions about the dosing behaviour at any time during the pressure and suction stroke, based on the power consumption of the solenoid coil and the position of the diaphragm.By comparing target and measured values, even bubbles can be precisely identified and selectively monitored.

The intelligent control ensures that the required dose is precisely measured even during pressure compensation.It adjusts the number of strokes and the compensation duration according to the number and size of gas inclusions, for example, according to the successive appearance of multiple bubbles in the suction line.This ensures that the dosing volume is reliably maintained even when multiple bubbles appear one after another in the suction line.