In modern water treatment and chemical processes, precise measurement and chemical addition have become key links in determining process effectiveness and economic benefits. The Projet dosing metering pump is controlled by a microprocessor and adopts the design principle of short stroke electromagnetic driven diaphragm, achieving precise fluid metering and control. This device has been widely used in multiple industrial fields due to its sophisticated structure, reliable performance, and cost-effectiveness.

1、 Technical principles and design features

The Projet dosing metering pump adopts the principle of electromagnetic driven positive displacement, and uses an electromagnetic push rod to drive the diaphragm to perform reciprocating motion inside the pump head. This movement causes regular changes in the volume and pressure of the pump head chamber, thereby controlling the opening or closing of the suction and discharge valves, achieving quantitative suction and discharge of liquid. The core advantage of a metering pump lies in its highly precise metering capability. By rotating the adjustment handwheel to adjust the stroke of the tappet, the expansion distance of the diaphragm can be changed, thereby accurately controlling the flow rate. The repeated metering accuracy of the Procent Concentrat C series metering pump is better than ± 2%, ensuring the accuracy of chemical dosing during the chemical dosing process. The pump head material has good chemical corrosion resistance, including various options such as polypropylene, organic glass, polyvinylidene fluoride, etc. Different materials can withstand various corrosive chemical liquids.

2、 Product series and technical parameters

Projet dosing metering pumps have multiple series of products to meet the needs of different application scenarios. The CONCECT C series, as the main product, has a measuring range from 0.7 to 23 l/h and a pressure range of 1.5 to 16 bar, covering most scenarios of low flow applications. Taking the typical CONC0803PP10000A000 model as an example, this pump has flexible adjustment function, and the stroke length can be continuously adjusted from 0 to 100% by manual knob (the optimal adjustment range is 30 to 100%). There are various forms of stroke frequency control, which can be manually adjusted to achieve three fixed measurement frequencies (100%, 50%, 25%), or controlled through external passive contact signals or analog 4-20mA current signals. In addition to the CONCECT C series, Prominent also offers multiple series such as Beta, Alpha, Vario, etc. The Beta series metering pump has a flow range of 0.74~32 l/h and a pressure of 16-2 bar; The Vario series has further increased its flow range to 16.6-120 l/h and pressure to 12-3.5 bar, meeting application scenarios with higher flow demands.

3、 Control system and intelligent characteristics

The Projet dosing metering pump is equipped with a multi-mode control system, and users can choose the appropriate control mode according to their actual application needs. Basic manual control allows operators to directly adjust stroke length and frequency on site. For scenarios that require automation control, the pump body supports external signal control. The metering pump can be easily integrated into existing automation systems through external passive contact signal control or analog 4-20mA current signal control. The intelligent protection function is another highlight of the Projet metering pump. When the system is connected to a medicine tank level gauge, based on the level alarm signal, the metering pump can automatically stop working to avoid damage caused by idling. Some models are also equipped with flow monitors that activate at each flow pulse action using proximity switches to monitor the working status of the pump in real time.

4、 Key points of operation and maintenance

Proper installation and start-up are prerequisites for ensuring the long-term stable operation of the metering pump. For externally controlled metering pumps, if the external control lock is activated, it is necessary to cancel the external control lock, set the stroke length adjustment knob to 100%, and set the stroke frequency selection switch to the 100% position. When starting, it is necessary to first loosen the exhaust valve about one turn, start the metering pump and run it until liquid appears at the discharge pipeline or exhaust valve. After the pump starts normally, close the exhaust valve. The focus of regular maintenance is on diaphragm inspection and replacement. When the diaphragm needs to be replaced, first remove the four screws that fix the pump head. After the pump head is loosened, adjust the stroke length to 0% to ensure that the electromagnetic shaft has sufficient pressure, keep its connection stable, and then unscrew the diaphragm. The safety valve is a key component that ensures normal pressure in the hydraulic chamber and protects the diaphragm. When the pressure inside the hydraulic chamber rises abnormally, the safety valve should quickly open to prevent equipment damage.

Nowadays, Procter&Gamble has developed into a global enterprise providing water treatment solutions, with products ranging from precision metering pumps and measurement sensors to complete disinfection devices and filtration systems. With the improvement of industrial automation level, the requirements for fluid measurement accuracy and control capability will continue to increase. As a product in this field, it will continue to promote the development of the process industry towards greater precision, reliability, and intelligence. Whether it is the addition of disinfectants to ensure the safety of drinking water or the precise measurement of additives in chemical processes, Prominent dosing pumps have demonstrated irreplaceable value in precise control and reliable operation.