Diaphragm Metering Pump
Precision Chemical Dosing Pump
Hydraulically actuated diaphragm metering pump for precision chemical dosing. Accurate, repeatable flow control for water treatment, chemical processing, and pharmaceutical applications. Adjustable stroke length for precise dosing.
Product Specifications
| Parameter | Range |
|---|---|
| Flow Rate | 1 – 1000 L/h |
| Pressure | Up to 20 bar |
| Accuracy | ±1% over 10–100% stroke range |
| Repeatability | ±0.5% |
| Materials | PVC, PVDF, 316SS, PTFE diaphragm |
| Temperature | -10°C to +60°C |
| Drive | Variable speed motor or manual adjustment |
Product Description
The Diaphragm Metering Pump is a hydraulically actuated positive displacement pump designed for precision chemical dosing and injection in water treatment, chemical processing, and industrial applications. Its flexible diaphragm eliminates seal leakage and provides accurate, repeatable flow from 1 to 1,000 L/h at pressures to 20 bar with ±1% accuracy over 10-100% stroke range. The pump features variable speed or manual stroke adjustment, with wetted materials including PVC, PVDF, 316SS, and PTFE. Ideal for chemical injection, pH control, and precision dosing systems.
- Dosing accuracy verification test
- Pressure test at 1.5× rated pressure
- Diaphragm integrity inspection
- Leakage test under operating conditions
- Stroke length calibration and verification
Applications
The Diaphragm Metering Pump is designed for precision chemical dosing in a wide range of industries:
- Water and wastewater treatment (coagulants, flocculants)
- Chemical processing and manufacturing
- Pharmaceutical production
- Food & beverage additives dosing
- Boiler water treatment and cooling water treatment
Quality Assurance
Every metering pump is factory-tested for accuracy and reliability:
Why Choose Our Positive Displacement Pumps
Precision Dosing Accuracy
±1% accuracy over the operating range ensures consistent chemical dosing.
Leak-Free Diaphragm Design
PTFE diaphragm eliminates packing leaks and reduces maintenance.
Wide Material Compatibility
Multiple wetted material options handle almost any chemical.
Key Features
Frequently Asked Questions
What is a metering pump used for?
How accurate is a diaphragm metering pump?
What fluids can a metering pump handle?
How do I adjust the dosing rate?
Selection Guide
✅ When to Choose This Pump
- High viscosity fluids (above 500 cP)
- Hygienic food and beverage products
- Precision metering and dosing
- Shear-sensitive products
⚠️ When NOT to Choose
- Large volume low-viscosity transfer
- Abrasive slurries with large particles
- High-pressure water injection
- Applications requiring variable flow at constant speed
💡 Common Selection Mistakes
- Not installing pressure relief valve
- Running at too high speed for viscosity
- Ignoring shear sensitivity of product
- Not considering pulsation dampening
Still unsure? Use our Pump Selection Center → or talk to our engineers →
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