AFS Pressure Switches, Water Pressure Switch, Differential Pressure Switch Manufacturer
The AFS pressure switches are general purpose airflow proving switches designed for HVAC, detection of blocked filters and fan suction, air flow monitoring in ducts, pipes, tunnels, and other energy management applications. It may be used to sense positive, negative or differential air pressure.
The plated housing contains a diaphragm, a calibration spring and a snap-acting switch. The sample connections located on each side of the diaphragm accept a 0.25" OD tubing via the integral compression and nut. An enclosure cover guards against accidental contact with the live switch terminal screws and the set point adjusting screw. The enclosure cover will accept a 0.5" conduit connection. The AFS-460 Pressure Switch has a reset button located on the top surface of the enclosure cover.
Technical Data
| Model | AFS-1 | AFS-2 | AFS-3 |
| Medium | Air | Air | Air |
| Mounting Position | Diaphragm in any vertical plane | Diaphragm in any vertical plane | Diaphragm in any vertical plane |
| Field Adjustable Range | 0.16±0.02" W.C. to 12.0" W.C. | 0.16±0.02" W.C. to 2.0" W.C. | 0.40±0.06" W.C. to 12.0" W.C. |
| Switch Differential | Progressive, increasing from approximately 0.1±0.02" W.C at minimum set point, to approximately 0.8" W.C. at maximum set point. | Progressive, increasing from approximately 0.1±0.02" W.C at minimum set point, to approximately 0.1" W.C. at maximum set point. | Progressive, increasing from approximately 0.1±0.02" W.C at minimum set point, to approximately 0.8" W.C. at maximum set point. |
| Maximum Pressure | 0.5psi (0.03bar) | 0.5psi (0.03bar) | 0.5psi (0.03bar) |
| Operating Temperature Range | -40℃-82℃ | -40℃-82℃ | -40℃-82℃ |
| Electrical Rating | 300 VA pilot duty at 115-277VAC, 10amp, non-inductive, 277VAC, 60Hz. | 300 VA pilot duty at 115-277VAC, 10amp, non-inductive, 277VAC, 60Hz. | 300 VA pilot duty at 115-277VAC, 10amp, non-inductive, 277VAC, 60Hz. |
| Electrical Connections | Screw top terminals with cup washers | Screw top terminals with cup washers | Screw top terminals with cup washers |
| Sample Line Connections | Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing. | Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing. | Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing. |
| Contact Arrangement | SPDT | SPDT | 2 SPST-NC (manual reset) |
Note: 1mbar=100Pa 1"W.C.=249Pa
Company Brief : Qiangli Industrial Co., Ltd. is a manufacturer of air pressure switches, water pressure switches, differential pressure switches and pressure control devices with high performance and reliability. Our pressure switches have set the standards for accuracy, quality, and dependability in industry...
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