For the selection of flow meters for dichlorohexafluorocyclobutane (liquid), based on the recommendations of technical personnel and specific requirements, we recommend using a Coriolis mass flow meter (small diameter model) or a high-precision turbine flow meter. The specific analysis and recommendations are as follows:

 

I. Summary of Core Requirements

Media Characteristics: Dichlorohexafluorocyclobutane (liquid), density 1.6 g/cm³, trace/small flow rate (0-100 g/h and 0-1000 g/h), inlet pressure 200-400 kPa, outlet pressure 110 kPa.

 

Technical Requirements:

Signal: 4-20 mA, Connection: 1/4" ferrule.

Sealing Material: FFKM (fluoride resistant), Sealing Performance: Helium leakage rate ≤1×10⁻⁹ mbar·l/s.

House Material: AISI 316 (316 stainless steel), Accuracy: 1.5% of full scale.

Operating Temperature: +25°C (room temperature), no special temperature compensation required.

Reason for Excluding Differential Pressure Meters: The medium may expand due to pressure changes, leading to measurement errors, and differential pressure meters are not accurate enough for micro-flow rates.

 

II. Recommended Solution

1. Coriolis Mass Flow Meter (Preferred)

Advantages: Direct measurement of mass flow rate: Unaffected by density and viscosity, accuracy ±0.1%-±0.5%, far exceeding the required 1.5%. Micro-flow rate adaptation: Small diameter models (e.g., DN4-DN15) can cover 0-100 g/h and 0-1000 g/h. g/h range, wide rangeability (typically 10:1 or higher).

 

Sealing and Materials: All-welded structure, FFKM seal, AISI 316 housing, meeting helium leakage rate and corrosion resistance requirements.

 

Easy Installation: No straight pipe section required, small space occupation, suitable for laboratory or compact environments.

 

Applicable Scenarios: Micro-flow measurement with extremely high accuracy and stability requirements.

 

2. High-Precision Turbine Flow Meter (Alternative)

 

Advantages:

Lower Cost: Turbine flow meters can be an option if budget is limited, but media compatibility needs to be verified.

 

Accuracy and Repeatability: Accuracy up to ±0.5%, repeatability ±0.1%, meeting the 1.5% requirement.

 

Output Signal: Supports 4-20 mA and pulse output, facilitating integration into control systems.

 

Limitations:

Media Cleanliness: Confirmation is needed that the media is free of particles or impurities to avoid turbine wear.

 

Viscosity Influence: If the media viscosity is high (specific data required), temperature compensation may be necessary.

 

Applicable Scenarios: Applications with high media cleanliness, low viscosity, and limited budget.

 

III. Key Parameter Matching

Requirement Items

Coriolis Flow Meter Characteristics

Turbine Flow Meter Characteristics Compatibility

 

Flow Range: 0-100 g/h and 0-1000 g/h (range verification required) Both cover the requirements.

 

Accuracy: ±0.1%-±0.5% ±0.5% Coriolis is superior.

 

Sealing: FFKM seal, helium leakage rate ≤1×10⁻⁹ mbar·l/s Sealing material (e.g., FFKM) needs confirmation. Coriolis directly meets requirements; turbine requires verification.

 

Material: AISI 316 316 stainless steel Both meet the requirements.

 

Signal Output: 4-20 mA 4-20 mA and pulse both meet the requirements.

 

Operating Temperature: -50°C to +200°C -20°C to +120°C Both cover the +25°C requirement.

 

Installation Requirements: No straight pipe section required. Requires a 5D upstream and 3D downstream straight pipe section (DN15 as an example). Coriolis Flow Meters Offer Greater Convenience

 

IV. Implementation Recommendations

**Prioritize Coriolis flow meters:** Their high accuracy, stability, and chemical compatibility perfectly match the measurement requirements of dichlorohexafluorocyclobutane, making them especially suitable for micro-flow scenarios.

 

If choosing a turbine flow meter: Please confirm the following:

**Medium viscosity (if viscosity > 10 cSt, a Coriolis flow meter is required).

**Is the sealing material FFKM (fluoride corrosion resistant)?

**Is there sufficient space in the straight pipe section for installation?**

 

**Pre-filtration:** If the medium contains small particles, a filter (pore size ≤ 10μm) must be installed before the flow meter.

 

If you have specific needs for selecting and quoting industrial flow meters, chemical flow meters, or precision flow meters, please contact CIXIFM Winny:

 

Email: sales01@cxflowmeter.com

WhatsApp: 008618049841995