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Mass flow controllers designed to indicate and control flow rates of gases. Advanced straight tube sensor combined with flow passage elements constructed of aluminum and brass for non-corrosive gases. Features a Max Pressure Differential of 50 psi (3.4 bar).
Mass flow controllers designed to indicate and control flow rates of gases. Advanced straight tube sensor combined with flow passage elements constructed of aluminum and brass for non-corrosive gases. Features a Max Pressure Differential of 50 psi (3.4 bar).
Incorporated with an advanced U-shaped tube sensor, this controller is constructed of aluminum and brass for non-corrosive gases or 316 stainless steel for corrosive applications. In addition, this controller has a built-in electromagnetic valve that allows the flow to be set to any flow rate within the range.
Features
Principles of operation
Metered gases are divided into two laminar flow paths, one through the primary flow conduit, and the other through a capillary sensor tube. Both flow conduits are designed to ensure laminar flows and therefore the ratio of their flow rates is constant.
Two precision temperature sensing windings on the sensor tube are heated, and when flow takes place, gas carries heat from the upstream to the downstream windings. The resultant temperature differential is proportional to the change in resistance of the sensor windings.
A wheatstone bridge design is used to monitor the temperature dependent resistance gradient on the sensor windings which is linearly proportional to the instantaneous rate of flow.
Output signals of 0 to 5 V DC and 4 to 20 mA are generated indicating mass molecular based flow rates of the metered gas. The combined gas streams flow through a proportionating electromagnetic valve with an appropriately selected orifice. The closed loop control circuit continuously monitors the mass flow output and maintains it at the set flow rate.
Flow rates are unaffected by temperature and pressure variations within stated limitations.
Applications
| Accuracy | ±1% of full scale |
| Calibration | Performed at standard conditions [14.7 psia (101.4 kPa) and 70°F (21.1°C)] unless otherwise requested |
| Repeatability | ±0.5% of full scale |
| Response Time | 300 ms time constant Approximately 1 second to within ±2% of set flow rate for 25% to 100% of full scale flow |
| Coefficient | Temperature 0.15% of full scale/°C Pressure: 0.01% of full scale/psi (0.07 bar) |
| Gas Pressure | Optimum: 25 psig (1.73 bar) Maximum: 1000 psig (70 bar) |
| Turn Down Ratio | 40:1 |
| Maximum Pressure Difference | 50 psi (3.4 bar) |
| Gas and Ambient Temperature | 32 to 122°F (0 to 50°C) |
| Leak Integrity | 1 x 10 to 9 smL/second of helium maximum to the outside environment |
| Materials Fluid Contact | Anodized aluminum, 316 stainless steel, brass & Viton O to rings |
| Attitude Sensitivity | No greater than ±15° rotation from horizontal to vertical |
| Signals | Output: Linear 0 to 5 V DC (1000 Ω minimum load impedance) 4 to 20 mA (0 to 500 Ω loop resistance) Maximum noise ±20 mV Command Signals: Analog 0 to 5 V DC 4 to 20 mA for remote set point mode NPN compatible purge/valve off |
| Connections | ¼" (0.635 cm) compression fittings Tube O diameter |
| Transducer Input Power | Universal +12 V DC to 26 V DC, 650 mA maximum |
| Circuit Protection | Circuit boards have built-in polarity reversal protection Resettable fuses provide power input protection |
| Display | 3½ digit LCD 0.5" (1.27 cm) high characters |
| CE Compliant | EN 55011 class 1, class B; EN50082-1 |
| Dimensions | 5.72 x 6.29 x 1" (14.53 x 15.98 x 2.54 cm) |
Click on a category to view a selection of compatible accessories with the AALBORG GFC17A-VAL6-A0-3NC-01-SS Mass Flow Controller, 0 to 10 ml/min N2, 1/4".
| Accuracy | ±1% of full scale |
| Calibration | Performed at standard conditions [14.7 psia (101.4 kPa) and 70°F (21.1°C)] unless otherwise requested |
| Repeatability | ±0.5% of full scale |
| Response Time | 300 ms time constant Approximately 1 second to within ±2% of set flow rate for 25% to 100% of full scale flow |
| Coefficient | Temperature 0.15% of full scale/°C Pressure: 0.01% of full scale/psi (0.07 bar) |
| Gas Pressure | Optimum: 25 psig (1.73 bar) Maximum: 1000 psig (70 bar) |
| Turn Down Ratio | 40:1 |
| Maximum Pressure Difference | 50 psi (3.4 bar) |
| Gas and Ambient Temperature | 32 to 122°F (0 to 50°C) |
| Leak Integrity | 1 x 10 to 9 smL/second of helium maximum to the outside environment |
| Materials Fluid Contact | Anodized aluminum, 316 stainless steel, brass & Viton O to rings |
| Attitude Sensitivity | No greater than ±15° rotation from horizontal to vertical |
| Signals | Output: Linear 0 to 5 V DC (1000 Ω minimum load impedance) 4 to 20 mA (0 to 500 Ω loop resistance) Maximum noise ±20 mV Command Signals: Analog 0 to 5 V DC 4 to 20 mA for remote set point mode NPN compatible purge/valve off |
| Connections | ¼" (0.635 cm) compression fittings Tube O diameter |
| Transducer Input Power | Universal +12 V DC to 26 V DC, 650 mA maximum |
| Circuit Protection | Circuit boards have built-in polarity reversal protection Resettable fuses provide power input protection |
| Display | 3½ digit LCD 0.5" (1.27 cm) high characters |
| CE Compliant | EN 55011 class 1, class B; EN50082-1 |
| Dimensions | 5.72 x 6.29 x 1" (14.53 x 15.98 x 2.54 cm) |
Click on a category to view a selection of compatible accessories with the AALBORG GFC17A-VAL6-A0-3NC-01-SS Mass Flow Controller, 0 to 10 ml/min N2, 1/4".
