ACU20FDL Series
The ACU20FDL liquid mass flow controller comprises a mass flow sensor, a flow‑control regulating valve, and an amplification‑and‑control circuit. It is designed based on the thermal conduction distribution effect, which arises when a flowing fluid transfers heat and alters the temperature distribution along the wall of a measurement capillary. A custom‑designed high‑speed proportional control valve is employed to achieve precise regulation of the liquid’s volumetric or mass flow rate.
Range: 2g/h～1000g/h
Overview
Applications
Specifications
Dimensions
Software
◆ Thermal‑anemometer principle, offering higher accuracy, faster response, and a network port.
◆ Tubular shunt, less prone to blockage
◆ Suitable for various low-pressure and high-pressure pipelines
◆ Short warm-up time, minimal zero drift, and high reliability
◆ Analog inputs/outputs can use secondary instruments or flow computers to control and display flow rates.
The ACU20FDL high-precision liquid mass flow meter/flow controller employs a calorimetric method based on the temperature difference across a capillary tube to measure gas mass flow, unaffected by variations in temperature and pressure. The flow signal detected by the sensor is amplified and compared with a setpoint voltage; the resulting error signal drives a control valve, enabling closed-loop regulation of the flow rate through the channel to match the desired value.
| Semiconductor | Solar energy | Industrial manufacturing | Petrochemicals |
| Coal Metallurgy | Environmental protection | Various instrumental analyses |
| Product model | ACU20FDL-L |
| Measurement range | 2 g/h to 1000 g/h |
| Measurement and control range | Flow meter range ratio: 100:1; Controller range ratio: 50:1. |
| Accuracy | ±0.5%F.S |
| Linear | ±0.25%F.S |
| Repeatability | ±0.2%F.S |
| Response time | Flow meter: <0.1 s |
| Flow controller: <0.2s | |
| Digital quantity | RS232/485, MODBUS protocol |
| Analog quantity | 0–5 V, 4–20 mA, 1–5 V |
| Power supply | ±15 VDC, 24 VDC |
| Operating temperature | 0–50°C |
| Work stress | Operating pressure drop: <0.01 MPa |
| Maximum withstand voltage | 3MPa/10MPa |
| Electrical connection | DB9 port |
| Leak rate | 1×10-9 Pa·m³/s |
| Temperature coefficient | ±0.025%F.S/℃ |
| Base material | Stainless steel |
| Sealing material | Fluororubber, chloroprene rubber, nitrile rubber |
| Joint | φ3, φ6, 1/8", 1/4" |
ACU20FDL-LC Dimensional Drawing
Mass Flow Measurement and Control System V5.0
