AVF250S Series
The AVF250S series is a Micro float flowmeter developed by ALIA, with a simple structure and easy installation, which is very suitable for the measurement of small flowrate of gas or liquid. The design of the trimming needle valve makes it convenient to adjust the flowrate. Combined with the flow regulator, the flow purge device is formed to achieve constant flowrate output. The AVF250S is widely used in petrochemical, oil refining, fertilizer, steel, medicine and other industries.
Features
- Measuring liquids or gases
- Local measurement, setting and monitoring of very low flow rates
- LCD display with 4-20 mA output and HART communication
- 1/4″ NPTF, 1/2″ NPTF, Compression Fittings or Flange connection
- Needle valve for flow regulation
- High resistance to pressure and temperature
- Flow regulators are used to provide constant flow rates in the case of variable inlet or outlet pressures
Specification
| Size | : | 10 mm |
| Measuring Range | ||
| Liquid | : | 0.1-120 L/hr |
| Gas | : | 1.6-3800 L/hr |
| Turndown Ratio | : | 10:1 |
| Accuracy | : | +/-4.0% FS (Standard) |
| : | +/-2.5% FS (Option) | |
| Repeatability | : | +/-1.0% FS |
| Material | ||
| Tube | : | Stainless Steel 316L |
| Float | : | Stainless Steel 316L or Titanium |
| Housing | : | Aluminum Alloy |
| Max. Pressure | : | 100 kgf/cm2 |
| Temperature | : | -25~150 °C |
| : | -25~120 °C (LCD Display) | |
| : | 20~150 °C (Flow Regulator) | |
| Ambient Temperature | : | -25~60 °C |
| Viscosity | : | Max. 3 CP |
| Process Connection | ||
| Thread | : | 1/4″ NPTF, 1/2″ NPTF |
| Compression Fittings | : | 6 mm / 8 mm / 10 mm / 12 mm |
| Flange 15 mm | : | JIS 10K / JIS 20K / JIS 40K |
| : | ANSI 150# / ANSI 300# / ANSI 600# | |
| : | DIN PN10 / PN16 / PN40 |
| Local Display | : | Mechanical Indicator |
| Digit Display | : | 5 Digit Flowrate |
| : | 7 Digit Totalizer | |
| Keypad | : | 3 internal keys for programming |
| and display control | ||
| Current Output | : | 4-20 mA (2-Wire) |
| Load | : | Rohm=(VDC-12) * 50 Ω |
| Limit Switches | : | 2-Wire NAMUR |
| : | 3-Wire transistor | |
| Power Supply | : | 12-32 VDC |
| Protection Class | : | IP67 |
| : | Intrinsically Safe, Ex ia IIC T6 | |
| Communication | : | HART signal (Compatible) |
| : | RS485 (MODBUS Protocol) | |
| Data Storage | : | Operation parameters and totalizer |
| figures are stored by EEPROM for | ||
| than 10 years | ||
| Cable Entry | : | Standard: M16 * 1.5 Option: 1/2″ NPTF |
| Option | : | Flow Regulator / Valve |
| Position | : | On Inlet / On Outlet |
| Flow Regulator | ||
| Diaphragm Material | : | PTFE, P≤1.5 MPa, T≤70 °C |
| : | Rubber, 1.5 MPa<p< span=””>≤4 MPa, T≤150 °C</p<> | |
| : | 316L, 4 MPa<p< span=””>≤10 MPa, T≤150 °C</p<> |
