Handling highly corrosive chemicals such as 98% concentrated sulfuric acid (H₂SO₄) and trifluoromethanesulfonic acid (CF₃SO₃H) is one of the most demanding challenges in industrial fluid control.
A customer recently approached us with exactly such a requirement:
Media: 98% H₂SO₄ + trifluoromethanesulfonic acid
Target flow rate: ~55.5 mL/min (≈5 kg/hour, density 1.5 g/cm³)
Reactor pressure: negative pressure (50–200 mbar)
Fluid temperature: 50°C
After technical evaluation, our team recommended the CIXIFM CX-CP-PT-200-57-BJ-F-6 ceramic valve piston pump – a precision metering pump specifically designed for aggressive chemical services.
Below we explain why this pump is the right choice, and how you can apply similar logic to your own corrosive liquid metering needs.
98% concentrated sulfuric acid is a strong oxidizer and dehydrating agent.
Trifluoromethanesulfonic acid (triflic acid) is one of the strongest organic acids – even more corrosive than sulfuric acid in some conditions.
Common pump materials (stainless steel, ordinary plastics, standard seals) will quickly fail due to:
Chemical attack
Swelling or hardening of elastomers
Corrosion of metallic components
Therefore, a corrosion-resistant, high-precision metering pump is mandatory.
The CX-CP-PT series from CIXIFM adopts a ceramic piston and valve structure, offering outstanding resistance to strong acids.
| Parameter | Value |
|---|---|
| Model | CX-CP-PT-200-57-BJ-F-6 |
| Media | Trifluoromethanesulfonic acid, 98% concentrated sulfuric acid |
| Piston diameter | 8 mm |
| Displacement per revolution | 200 μL/rev |
| Flow range | up to 100 mL/min (controllable) |
| Working speed | 0–500 r/min |
| Target operating point | ~55.5 mL/min (≈5 kg/hour) |
| Shell material | PT (polytetrafluoroethylene) |
| Fitting external thread | 6 mm |
| Discharge pressure | adapts to negative pressure reactor (50–200 mbar) |
| Repeatability accuracy | ≤0.5% |
| Fluid temperature | 50°C |
| Drive | 2‑phase stepper motor |
| Voltage | DC24V |
| Power | 50W |
| Special feature | Forward and reverse rotation |
This pump supports bi-directional operation, which is especially useful in laboratory or pilot-plant setups where backflushing or precise volume adjustment is needed.
Because the pump delivers a fixed displacement per revolution (200 μL), combined with a stepper motor drive, users can achieve highly repeatable chemical dosing without an external flow meter in many cases.
The target flow rate is approximately 55.5 mL/min.
Given:
Displacement = 200 μL/rev = 0.2 mL/rev
Required speed = 55.5 ÷ 0.2 ≈ 277.5 r/min
This falls well within the rated speed range (0–500 r/min), providing a safe margin for control and stability.
The density of the mixed acid is assumed at 1.5 g/cm³ → mass flow ≈ 5 kg/hour, matching the customer’s requirement.
This pump is suitable for:
Fine chemical synthesis (where triflic acid acts as a catalyst)
Sulfonation reactions
Laboratory and pilot‑scale acidic liquid delivery
Precision feeding into negative‑pressure reactors
The combination of PT shell + ceramic internals ensures no metal contamination of the process fluid – critical in pharmaceutical or high‑purity chemical applications.
CIXIFM specializes in small‑flow, high‑pressure, and corrosion‑resistant metering pumps. Our ceramic piston pump series has been proven in thousands of installations handling:
Sulfuric acid (all concentrations)
Nitric acid
Trifluoromethanesulfonic acid
Alkaline solutions
Organic solvents
Key advantages:
≤0.5% repeatability accuracy
Long maintenance interval (ceramic is extremely wear‑resistant)
Compact size for OEM or benchtop systems
Customizable drive and fitting options
If you are transferring 98% concentrated sulfuric acid or trifluoromethanesulfonic acid at low flow rates (20–100 mL/min), do not risk using an incompatible pump.
The CX-CP-PT-200-57-BJ-F-6 ceramic piston metering pump offers:
✅ Chemical compatibility
✅ Metering precision (≤0.5%)
✅ Reliable operation under negative pressure
✅ Stepper motor control for easy automation
✅ Forward/reverse flexibility
Do you have a similar requirement for chemical liquid metering pumps or precision liquid delivery pumps?
Email: [email protected]
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hotline
(86)021-57632436