Why R134a Refrigerant Demands a Coriolis Mass Flow Meter
R134a is widely used in air conditioning, chillers, heat pumps, and industrial refrigeration. For accurate measurement, a Coriolis mass flow meter is often the preferred choice — it measures mass flow directly, unaffected by temperature, pressure, or density changes.
Where Coriolis meters are used with R134a:
Refrigerant charging on air conditioner and chiller production lines
Refrigerant filling and trading settlement for R134a cylinders
Performance and energy efficiency testing labs (COP, enthalpy difference)
Industrial process cooling, cold storage, and chemical reactor cooling
Central cooling stations and district cooling systems
R134a recovery, purification, and regeneration equipment
Why Coriolis for R134a?
Direct mass flow measurement, no compensation needed
High accuracy: ±0.1% to ±0.2%
No moving parts, resistant to refrigerant and POE oil corrosion
No straight pipe requirements, ideal for compact refrigeration piping
Stable under high pressure and low temperature
Key selection points:
Temperature: -20°C to +60°C for liquid; up to 120°C for gas/two-phase
Pressure: 2.5 MPa standard; 4.0 MPa for high-pressure heat pumps; 6.3 MPa for lab test benches
Line size: DN6–DN8 for charging machines; DN10–DN15 for unit piping; DN20–DN25 for large chillers; DN15–DN40 for cylinder filling
Material: 316L stainless steel; EPDM gaskets (never NBR)
Explosion-proof: Ex d II BT4 for refrigerant workshops
Accuracy: 0.1% for trade settlement and production charging; 0.1%–0.15% for lab testing; 0.2% for monitoring
Critical notes:
Avoid two-phase flow — R134a flashes easily; ensure subcooled liquid
Choose dual temperature and pressure compensation
Use anti-vibration meter design near compressors
Install vertically, with a filter upstream
Drain residual R134a during long shutdowns
Typical applications:
Chiller refrigerant circulation metering
Compressor production line R134a charging
Enthalpy difference lab cooling capacity testing
Cold storage and heat pump flow and cooling capacity calculation
R134a recovery, cylinder filling, and trade measurement
For R134a systems, selecting the right
Coriolis mass flow meter ensures accurate charging, reliable performance testing, and long-term stable operation.
