In the world of water and wastewater treatment, precision is everything. Whether you’re managing an STP, ETP, RO system, or a chemical treatment plant, the dosing pump is one of the most critical components for maintaining system efficiency, chemical balance, and long-term reliability.

But with so many types and models available in the market — mechanical, solenoid-driven, hydraulic, plunger, diaphragm — how do you choose the right one?

Here’s a comprehensive guide to selecting the perfect dosing pump for your application.

✅ 1. Understand Your Application

Start by identifying your use case:

• RO, UF, WTP: Dosing of antiscalants, chlorine, and pH correctors.
• STP/ETP: Requires accurate dosing of coagulants, flocculants, alkalis, acids, etc.
• Industrial plants: May need customized chemical handling.

✅ 2. Identify Chemical Properties

Every chemical has different demands:

• Viscous or abrasive? Choose robust construction and stroke adjustability.
• Corrosive? Opt for compatible wetted parts — SS316, PVDF, or PP.
• Gaseous or foaming? Use degassing heads or auto air-venting pumps.

✅ 3. Define Flow Rate and Pressure

Knowing your dosing requirement is essential:

• Flow (LPH): Based on process volume.
• Discharge Pressure (bar): Must match pipeline pressure.

💡 Always select a pump that operates at 70–80% of its rated capacity to ensure accuracy and longer life.

✅ 4. Choose the Right Pump Type

Each pump type has its strengths. Choose based on your specific need:

• Solenoid-Driven Dosing Pumps:  Ideal for low-flow, low-pressure systems. Economical and compact.
• Mechanical Diaphragm Dosing Pumps (IDP Series):  Reliable for most water treatment chemicals. Low maintenance.
• Plunger Type Pumps (I-M-DP Series):  Used where high-pressure and accuracy are required. Suitable for viscous media.
• Hydraulic Diaphragm Pumps:  Best for critical dosing with zero leakage. Complies with API standards.

✅ 5. Consider Control Options

Modern treatment systems require automation:

• Manual Adjustment: For fixed, basic dosing needs.
• Pulse Input: Trigger-based dosing via water meters.
• 4–20 mA Control (IDP Pro Series): Enables PLC/SCADA integration.
• Digital Smart Pumps: For online/remote operation and monitoring.

✅ 6. Look for Supportive Features

Depending on your process complexity, you may need:

• Stroke length and frequency adjustment
• Built-in pressure relief valve
• Auto priming & degassing
• Level sensors & alarm integration

✅ 7. Evaluate Quality, Service & Spare Availability

Make sure your pump partner can offer:

• Fast technical support
• Spare part availability
• Installation & commissioning support
• Training & documentation

🔚 Conclusion

Choosing the correct dosing pump isn’t just about specs — it’s about ensuring compatibility, efficiency, and safety. At Infinity Equipments, we help clients select and customize pumps that match their specific application, flow, and process requirements.

Whether you’re designing a new plant or upgrading an existing system, making the right dosing pump choice can significantly impact your operation’s cost, performance, and sustainability.

📩 Need help selecting a dosing pump? Let’s connect — I’m happy to assist with sizing, datasheets, or full system design guidance.