The metering pump dosing system is an integrated chemical preparation and injection unit designed to deliver liquid chemicals into industrial processes at a controlled flow rate and pressure. The complete system combines chemical storage, solution mixing, accurate metering and external delivery in one compact equipment package.

The system normally consists of a solution tank, agitator, high-precision metering pump, connecting pipelines, valves, instruments, control components and a supporting frame. Its modular design allows the equipment configuration to be adjusted according to the chemical medium, required dosing capacity, discharge pressure and operating conditions.
Depending on the selected metering pump, the system can provide a maximum flow rate of up to 50 m³/h and a maximum discharge pressure of up to 50 MPa. Solution tanks are available with capacities ranging from 0.5 m³ to 20 m³, allowing the system to meet both small-volume chemical dosing and large industrial chemical injection requirements.
The automatic metering pump dosing system supports manual, automatic, local and remote operating modes. It can be manufactured from 304 stainless steel, 316 stainless steel, carbon steel with corrosion-resistant lining or engineering plastics according to the characteristics of the chemical solution.

How the System Works
The chemical solution is first prepared or stored inside the dosing tank. An agitator can be used to maintain a uniform chemical concentration and prevent sedimentation. The metering pump then draws the prepared solution from the tank and injects it into the required pipeline, vessel or treatment system at a controlled flow rate.
According to the project requirements, the dosing process can be operated continuously or intermittently. The dosing amount can also be adjusted to match changes in process conditions, chemical concentration or treatment capacity.

Applicable chemicals:
The system can be used for the preparation and controlled injection of:
Acid solutions
Alkali solutions
Salt solutions
Ammonia solution
Phosphate solution
Hydrazine solution
Flocculants
Coagulants
Corrosion inhibitors
Scale inhibitors
Biocides
Dehydrating agents
Disinfection chemicals
pH adjustment chemicals
Boiler water treatment chemicals
Circulating-water treatment chemicals





Applications of metering pump dosing system:
1. Water Treatment
The metering pump dosing system can be used to add coagulants, flocculants, disinfectants, acids, alkalis and other treatment chemicals into municipal or industrial water-treatment processes.
2. Wastewater Treatment
It is suitable for chemical neutralization, pH adjustment, coagulation, flocculation, disinfection and sludge-treatment processes in industrial wastewater plants.
3. Power Plants
The system can be used for ammonia dosing, phosphate dosing and hydrazine dosing in boiler water, feedwater, condensate water and circulating cooling-water treatment systems.
4. Boiler Water Treatment
Controlled chemical injection helps reduce corrosion, scale formation and water-quality problems in industrial boiler systems.
5. Circulating Cooling Water
The system can inject corrosion inhibitors, scale inhibitors, biocides and pH-adjustment chemicals into circulating-water pipelines.
6. Oilfield Operations
It is suitable for adding demulsifiers, dehydrating agents, bactericides, scale inhibitors and corrosion inhibitors during oilfield gathering, transportation and water-treatment processes.
7. Petroleum and Refining
The metering pump dosing unit can deliver process chemicals into pipelines, tanks and treatment systems in petroleum, oil-refining and petrochemical facilities.
8. Natural Gas Processing
It can be applied to chemical injection, corrosion control, water conditioning and other treatment processes in natural gas production and processing facilities.
9. Chemical Industry
The system provides controlled dosing of acids, alkalis, additives and other liquid chemicals during chemical production and processing.
10. Metallurgical Industry
It can be used for circulating-water treatment, wastewater neutralization and chemical addition in steel plants and non-ferrous metal processing facilities.
11. Pulp and Paper Industry
The system is suitable for chemical preparation and dosing during pulp production, papermaking and wastewater-treatment operations.
12. Pharmaceutical and Food Industries
When manufactured from suitable stainless steel materials, the dosing system can be used for chemical addition and process-water treatment in pharmaceutical and food-processing facilities.

1. Integrated chemical storage, mixing, metering and injection functions
2. High-precision metering pump for controlled chemical delivery
3. Maximum flow rate of up to 50 m³/h
4. Maximum discharge pressure of up to 50 MPa
5. Solution tank capacity available from 0.5 m³ to 20 m³
6. Compact structure requiring limited installation space
7. Manual, automatic, local and remote control options
8. Stable chemical delivery under different operating conditions
9. Suitable for continuous and intermittent dosing processes
10. Low energy consumption and convenient operation
11. Easy access for routine inspection and maintenance
12. Corrosion-resistant material options for aggressive chemicals
13. Available in 304 and 316 stainless steel
14. Optional carbon steel with polymer lining
15. Flexible combination of tanks, mixers and metering pumps
16. Customized design according to customer process requirements

Optional System Configurations
The metering pump dosing system can be configured according to the required dosing process. Common configurations include:
1. One tank with one metering pump
2. One tank with two metering pumps
3. Duty and standby metering pump arrangement
4. Two tanks with multiple dosing pumps
5. Multi-tank and multi-pump dosing system
6. Dosing tank with mechanical agitator
7. Skid-mounted chemical dosing package
8. High-pressure chemical injection system
9. Automatic chemical preparation and dosing unit
10. Customized chemical dosing system for multiple injection points