FS100 series electronic flow switch

1.Pneumatic and hydraulic systems

Application scenarios

Pneumatic system: Monitor the pipelines from the air compressor outlet to the pneumatic components to ensure a stable air source.

Hydraulic system: Installed at the pump outlet, return oil circuit or the front end of key valve blocks, it monitors the supply of pressure oil.

Specific functions

Cut-off/Insufficient flow protection: If the flow rate drops below the set value due to pipeline rupture, blockage or pump failure, the switch will immediately act to issue an alarm or shutdown signal, preventing the system from operating under abnormal conditions.

Lubrication circuit monitoring: In the central lubrication system of large machinery, it is necessary to monitor whether the lubricating oil has been successfully delivered to each bearing, slider and other friction pairs. Insufficient flow means lubrication failure, which may soon lead to equipment damage.

Cooling circuit monitoring: For the oil cooler of the hydraulic system or the aftercooler of the pneumatic system, monitor the flow rate of the cooling water (or other cooling media) to ensure the heat dissipation effect and prevent the system oil temperature or air temperature from being too high.

2. Detection of Water Flow Interruption in the Circulating Water System

Application scenarios

The make-up water pipe of the cooling tower.

The inlet/outlet pipelines of cooling water for industrial chillers, heat exchangers and condensers.

Internal water circulation circuits for equipment such as laser devices, injection molding machines, and central air conditioning systems.

Specific functions

Equipment protection: If the cooling water is interrupted due to pump failure, incorrect valve closure or filter blockage, the cooled equipment (such as lasers, spindles, molds) will overheat rapidly, causing permanent damage. When the flow switch detects a flow interruption, it will interlock to stop the operation of the main equipment to prevent accidents.

System interlocking control: It can be used for sequential start-up. For example, the main motor or heating system can only be started after confirming that the cooling water flow is normal.

3. Cut-off detection of cutting fluid and lubricating oil

Application scenarios

Machining centers/CNC lathes: Flow monitoring of Through-Spindle Coolant, internal cold channels of tools, and external spray pipes.

Grinding machines, honing machines: Supply monitoring of grinding fluid.

Gearbox, bearing housing: Monitoring of the lubricating oil circulation system.

Specific functions

Ensuring processing quality: Insufficient flow of cutting fluid can lead to poor chip removal, accumulation of cutting heat, resulting in poor surface quality of the workpiece, dimensional accuracy exceeding the tolerance, and premature wear of the cutting tool. The flow switch ensures that the processing cycle begins only when the flow is sufficient.

Blockage prevention warning: Especially for cutting fluids containing fine chips, a slow decline in flow rate may indicate that the filter is clogged or the pipeline is about to be clogged. Switches can provide early warnings.

Protecting precision spindles: High-speed spindles rely on oil-gas lubrication or oil mist lubrication. The interruption of lubricating oil flow can cause the spindle bearings to "burn out" within minutes, resulting in huge losses.

4. Pump idling protection

Mechanism: Pump idling (dry operation) refers to the situation where there is no medium or insufficient medium inside the pump during operation. This will lead to:

Inability to cool: The medium itself serves as the coolant for the pump. Idling causes the frictional heat to be unable to dissipate, resulting in a sharp increase in temperature.

Inability to lubricate: Seals and bearings (for centrifugal pumps) rely on medium lubrication. Idling leads to dry friction and rapid damage.

Cavitation and mechanical damage: Idling of a centrifugal pump can cause severe cavitation and vibration, damaging the impeller and pump casing.

How to achieve protection

Install the electronic flow switch on the outlet pipeline of the pump and set a minimum flow value (for example, 10% of the rated flow).

When the pump starts, if the flow switch does not detect a signal exceeding the minimum flow within the set time, it is determined that the pump is idling or the outlet is blocked, and an immediate signal is sent to stop the pump's operation.