The product
Mechanical flow switches technology
F10: Force of liquid or gas flow against a vertical flow vane mounted in a line causes the vane to pivot to a horizontal position, moving an attraction sleeve into the field of a switch magnet. This pulls the magnet toward the sleeve and actuates the switch.
F50: The force of liquid flow through a valve body and against a flow disc causes it to lift out of the flow path. The attraction sleeve at the top of the disc assembly moves into the field of a switch magnet, attracting the magnet and actuating the switch.
Features
- Field adjustable
- Negligible pressure drop
- Process pressures to 1000 psig (69 bar)
- Process temps. to +450°F (+230°C)
- Actuation on increasing or decreasing flow
- Standard flow vanes for 2” through 10” flow lines
- Special sensing elements for non-standard or high flow applications
Options
- High flow vanes
- Larger pipe vanes
- Carbon steel or SST construction.
- 21-1290 GPM actuation flow rates depeding on material and line size
Operating principle
The actuating vane is magnetically linked to a pivoted electric (or pneumatic) switch, which is isolated from the process by a non-magnetic barrier tube. As the actuating vane moves with an increase in flow, it drives a magnetic sleeve into the field of a permanent magnet located outside the barrier tube which trips the switch. As flow decreases, the actuating vane returns to a vertical position, allowing the magnet and switch assembly to return to the “No Flow” position.
Approvals
| ATEX | Ex d, Ex ia |
| CCOE | Ex d |
| CSA | XP |
| FM | XP |
| EAC (GOST) | Ex d, Ex ia |
| IEC | Ex d, Ex ia |
| Inmetro | Ex d |
| Korea | Ex d |
| NEPSI | Ex d |
Other approvals are available. Consult factory for more details.
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