Dosing Plant Overview: Complete Chemical Dosing System Built With Digital Metering Pump and Electromagnetic Diaphragm Metering Pump

2026-10-19 10:43:18

A dosing plant, also named chemical dosing skid or chemical dosing system, is an integrated unit for automatic preparation and injection of liquid chemicals. A standard dosing plant consists of chemical tank, mixer, liquid level sensor, filter, safety accessories, control cabinet and Metering pumps. Customers can select digital metering pump or electromagnetic Diaphragm metering pump as the dosing core according to flow, pressure and automation requirement. Many industrial projects adopt both types in one dosing plant for different chemical feeding points.

Dosing plant is widely used in drinking water treatment, sewage treatment, power plant boiler water, cooling circulating water, desalination, oil & gas, food and beverage, chemical and mining industries. Typical dosing tasks include pH adjustment, coagulant dosing, disinfection, scale inhibition, corrosion inhibition and heavy metal removal. The performance of the whole dosing plant largely depends on the metering pump. Stable and accurate metering avoids excessive chemical consumption, reduces operation cost and guarantees outlet water quality.

Electromagnetic Diaphragm Metering Pump is widely equipped in small and medium dosing plant. It features low cost, simple operation and easy maintenance. It fits low-flow chemical injection such as sodium hypochlorite dosing. It can work with pH/ORP sensor to realize automatic dosing. When the system only needs basic automatic control without remote data transmission, electromagnetic diaphragm metering pump is the economical choice for dosing plant.

When projects require high precision, remote monitoring and data recording, digital metering pump becomes the preferred option for the dosing plant. Digital metering pump supports Modbus communication, real-time flow display, cumulative volume recording and multi-parameter alarm. It can connect to central control system, which is essential for large water treatment plants, petrochemical and pharmaceutical factories. In large dosing plant, multiple digital metering pumps are installed on one skid to dose different chemicals independently.

We design customized dosing plant according to client’s site condition. Skid-mounted structure is convenient for container shipment and on-site installation. All pipelines, valves and instruments are pre-assembled and tested in our factory. After arrival, users only need to connect water pipeline, chemical tank and power supply to start running. We can match digital metering pump, electromagnetic diaphragm metering pump or mixed pump configuration for one dosing plant.

Material selection for dosing plant is important. Chemical tank can be PE, PVC or stainless steel. Pump Head of digital metering pump and electromagnetic diaphragm metering pump can be PP, PVDF or 316SS to resist corrosion. We also equip safety accessories like overflow device, leak tray, Pressure Relief Valve to improve system safety, especially for hazardous chemical dosing.

Before ordering a dosing plant, please provide required dosing flow, working pressure, chemical medium, medium temperature, automation requirement and installation environment. Our engineering team will evaluate whether digital metering pump or electromagnetic diaphragm metering pump is suitable for your case and draw layout drawing.

In conclusion, dosing plant is a turnkey solution for industrial chemical feeding. Choosing proper digital metering pump or electromagnetic diaphragm metering pump is the key to stable system operation. Contact us to get engineering proposal and price list for your dosing plant project.