Mechanical flow switches

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.

F10: Vane actuated flow switch basic operating principle

Flow through the horizontal pipeline causes the pivoted mechanical flow switch vane assembly to swing in the direction of the flow, lifting an attraction sleeve to actuate the switch.

The O-ring sealed adjusting screw in the top of the enclosing tube compresses the range spring located above the attraction sleeve. Turning the adjusting screw clockwise increases the rate at which the flow switches actuate. Adjustments can be made while the flow switch is in service.

F50: Disc actuated flow switch basic operating principle

The rate of flow through the valve body raises or lowers the disc. This in turn raises or lowers the magnetic sleeve, within its sealed non-magnetic enclosing tube. On an increasing flow rate, the magnetic sleeve rises into the field of the permanent magnet, located outside the enclosing tube, actuating the attached switch mechanism. When the flow rate drops below the rate for which the flow disc is calibrated, a reversal of this action occurs.

Discover our mechanical flow switches

Magnetrol

Model F10 vane-actuated mechanical flow switch

Magnetrol® flow switches provide dependable flow control for a wide range of industrial applications, detecting the presence or absence of flow in horizontal pipelines with exceptional accuracy. Designed for reliability and long service life, these switches help protect critical equipment and ensure efficient system performance.

Model F10 flow switches are vane-actuated units engineered for use with both gas and liquid flow in 2-inch through 10-inch flow lines. Their rugged construction makes them ideal for demanding environments such as chemical processing, oil and gas, water treatment, and power generation. With proven Magnetrol® quality, F10 flow switches offer a cost-effective way to monitor process flow, prevent damage from low-flow conditions, and maintain consistent system operation.

Magnetrol

Model F50 disc-actuated mechanical flow switch

Magnetrol® flow switches are highly reliable flow control solutions utilized to sense the presence or absence of flow in horizontal pipelines. Disc-actuated Model F50 switches are in-line type used for sensing clean liquids in 2 inch or smaller line sizes.