In water treatment, manufacturing, and swimming pool maintenance, injecting the exact amount of a chemical is critical. Too little chemical is ineffective; too much is wasteful, expensive, and potentially dangerous. Dosing pumps (or metering pumps) are precision instruments designed to deliver a highly accurate, repeatable volume of fluid over a specified time.
Autonex supplies precision dosing pumps and complete chemical injection skids for industrial and water treatment applications across Qatar.
How Does a Dosing Pump Work?
A dosing pump is a small positive displacement pump. It draws a specific volume of chemical into a chamber and forces it into the process line. The flow rate can be precisely adjusted — either manually or automatically via an external control signal — by changing the stroke length (how much fluid is moved per stroke) or the stroke frequency (how often the stroke occurs).
Types of Dosing Pumps
Solenoid-Driven Diaphragm Pumps
An electromagnet (solenoid) pulls and pushes a diaphragm to pump the fluid. Very common for low flow rates (e.g., 1 to 50 litres/hour) in water treatment and swimming pools. Highly accurate and cost-effective.
Motor-Driven Diaphragm Pumps
An electric motor drives the diaphragm mechanically. Used for higher flow rates and continuous industrial duty. The diaphragm ensures there are no dynamic seals, meaning zero leakage of hazardous chemicals.
Peristaltic Pumps
Rollers squeeze a flexible tube, pushing the fluid along. Excellent for highly viscous fluids, slurries, or fluids that degrade with shear (like certain polymers). The fluid only touches the tube, making maintenance very simple.
Key Applications in Qatar
- Water Treatment — Dosing chlorine, sodium hypochlorite, and pH adjusters in Qatar’s municipal water systems and desalination plants
- Cooling Towers — Injecting biocides and scale inhibitors into HVAC cooling water circuits to prevent Legionella and fouling
- Swimming Pools — Automatic dosing of chlorine and acid in hotel and residential pools
- Oil & Gas — Injecting corrosion inhibitors, demulsifiers, and methanol into process pipelines
- Agriculture — Fertigation (injecting liquid fertilisers into irrigation water)
Control and Automation
Modern dosing pumps can be integrated with analytical sensors (like pH or ORP probes). For example, if a pH sensor detects the water is too acidic, the controller signals the dosing pump to automatically inject an alkaline solution until the correct pH is restored.
Contact Autonex today for dosing pump selection and automated chemical injection solutions in Qatar.
Qatar’s Premier Authorized Distributor
Autonex stands as Qatar’s leading industrial supplier, holding exclusive authorized dealer rights for global manufacturing giants including PARAMINA (Advanced Compressors) and MEMF / META (Electrical Infrastructure & Switchgear). Contact us today for authentic products and certified engineering support.
