Flow Switches

Flow switches are critical safety and monitoring devices used across numerous industries to regulate and control the flow of liquids or gases through pipes, channels, and systems. These versatile switches play a vital role in ensuring proper flow rates, preventing system damage, and triggering alarms or actions in case of flow disruptions.

What are Flow Switches?

Flow switches are electromechanical devices that detect changes in the flow rate of fluids passing through a designated pipe or channel. They monitor flow continuously and activate when flow exceeds or drops below predetermined thresholds.

How Do Flow Switches Work?

Flow switches typically use a sensing mechanism—often a paddle or vane—that moves in response to the fluid flow. This movement triggers an electrical signal, which is sent to a control system. The control system can then perform various actions, such as sounding an alarm or stopping a pump.

How to Install and Test a Flow Switch

To install a flow switch, it must be positioned where fluid flow is smooth and uninterrupted. After installation, connecting the switch to the control system or alarm panel is required. Testing involves running the system to check if the switch activates at the correct flow rate, preventing potential issues like pump failure.

Types of Flow Switches Available

• Paddle Flow Switches: Mechanical switches triggered by the movement of a vane or paddle.
• Magnetic Flow Switches: Ideal for monitoring water flow, using a magnetic field to detect the fluid.
• Electronic Flow Switches: Highly accurate switches with digital sensors for real-time monitoring.

Flow Switches for Water Pumps

Flow switches in water pump systems monitor water flow, ensuring pumps don’t run dry. If the flow falls below a set threshold, the switch sends a signal to stop the pump, preventing damage caused by cavitation or overheating.

Flow Switches for Sprinkler Systems

In fire suppression systems, flow switches detect water movement in pipes when sprinklers activate, triggering alarms or emergency services responses to ensure timely action during a fire.

Air Flow Switches for Ducting

Air flow switches monitor airflow in HVAC ducts. These switches detect blockages or leaks in the system, ensuring that air circulates properly throughout the ductwork.

Applications of Flow Switches:

• Pump Protection: Preventing pumps from running dry or working under excessive strain.
• HVAC Systems: Ensuring proper airflow in ducts and monitoring system performance.
• Water Treatment: Controlling the flow of water through various treatment stages.
• Fire Suppression Systems: Detecting water flow in response to sprinkler activation.

At Applications Engineering, we offer a comprehensive range of high-quality flow switches, including plastic-bodied and metal-bodied models, designed to meet the diverse requirements of various industries and applications. Our flow switches are engineered for reliability, accuracy, and durability, providing peace of mind and ensuring the safe and efficient operation of your critical systems.