FC210 Piston flow switch

Simple and reliable structure: Few internal moving parts (mainly pistons, springs and switches), a sturdy mechanical structure that is not prone to damage and has a low failure rate.

Low cost: Compared with electronic flow meters (such as electromagnetic, turbine, ultrasonic) or other complex flow switches, the manufacturing cost and maintenance cost of piston flow switches are usually lower.

Insensitive to contamination: Due to its simple structure, the flow channels are usually straight, which can handle fluids containing solid particles, impurities or high viscosity (such as coolant, lubricating oil, cutting fluid, sewage, etc.) very well and are not prone to clogging. This is a significant advantage of it over the turbine flow switch.

Fast response speed: The mechanical movement of the piston directly responds to the changes in hydrodynamic pressure, with rapid switch action and small delay.

Low pressure loss: The flow channel design is usually relatively smooth, causing relatively small pressure loss to the fluid.

Easy to install: The threads can be installed in a flexible direction (some models can be installed vertically, horizontally or at an Angle, depending on the specific design).

High pressure resistance: A well-designed piston-type flow switch can withstand high system pressure.

Wide temperature range: By choosing the appropriate sealing materials and structures, it can adapt to a relatively wide working temperature range.

The core value of the piston flow switch lies in reliably detecting the presence or absence of fluid or whether the flow rate exceeds or falls below a certain set threshold. It is often used for protection, control or alarm in the following situations:

Cooling system monitoring

Monitoring of cooling water/coolant flow for laser equipment, welding equipment, injection molding machines, and CNC machine tools to prevent overheating and damage.

Cooling water/oil flow protection for engines, generators, compressors, transformers, and frequency converters.

Detection of the circulating flow of chilled water and cooling water for central air conditioning/chiller units to protect compressors and water pumps.

Monitoring of coolant flow in server cabinets of data centers.

Lubrication system protection

Monitor the flow of lubricating oil channels for key equipment such as machine tool spindles, gearboxes, and bearings to ensure adequate lubrication and prevent dry friction damage.

Flow detection of centralized lubrication systems for large-scale machinery (such as mining equipment and port machinery).

Pump protection

Dry running protection: Installed at the pump outlet, it detects whether the pump has successfully started and delivered fluid, preventing damage from idling (such as water pumps, chemical pumps, oil transfer pumps, etc.). This is an extremely important application.

Pump minimum flow protection (to prevent overheating and cavitation).

Fluid circuit status indication

Check whether the fluid in the pipeline is flowing (for example, the flow rate will decrease when the pressure difference before and after the filter is insufficient).

Confirm whether the valve has been fully opened or closed (judged by the flow rate).

Monitor whether the cleaning system and the sprinkler system are working properly.

Chemical Engineering and Process Industry

Monitor the flow of corrosive or toxic media (corrosion-resistant materials such as 316L SS and Hastelloy should be selected).

Confirm whether the fluid has been injected or discharged during batch processing.

Flow monitoring of the cooling/heating medium in the jacket of the reaction vessel.

Water Treatment and Environmental Protection

Reverse osmosis system feed water flow monitoring.

Confirmation of the outlet flow rate of the dosing pump.

Flow detection of sewage and sludge conveying pipelines (wear resistance and anti-clogging design need to be considered).

Fire protection system

Water flow indication at the outlet of the spray pump (confirm that the pump has been started and is supplying water).

Fire hydrant system water flow monitoring.

HVAC system

Protection of the circulating water flow on the primary and secondary sides of the boiler.

Monitoring of circulating water flow for ground source/water source heat pumps.

Water flow detection of fan coil units (for some models).

Agricultural irrigation

Monitor whether there is water flowing in the main pipeline or branch lines and protect the water pump.