McDonnell & Miller FS5-1 Switch
The McDonnell & Miller FS5-1 (Part Number 114780) is a rugged, 1 inch NPT In-Line Liquid Flow Switch engineered for high-sensitivity requirements in commercial and industrial hydronic systems. Built with a durable brass body and EPDM elastomer seals, this general-purpose switch features a snap-acting SPDT switch that facilitates reliable pump control and equipment protection by detecting flow velocities as low as 1.5 GPM. Performance remains consistent across a maximum operating pressure of 150 psi and fluid temperatures up to 250°F. Its unique in-line design eliminates the need for an external pipe tee, streamlining installation in tight mechanical rooms. For precise field requirements, a built-in sensitivity adjustment screw allows for fine-tuning the setpoint to prevent erratic cycling. This unit is frequently deployed as a boiler flow switch or to interlock chillers and heat exchangers, ensuring vital low flow protection for expensive HVACR components.
Key Benefits- In-Line Configuration: Direct mounting on 1" piping saves space and eliminates the cost of additional pipe tees.
- Broad Temperature Range: Maintains high performance in applications ranging from 32°F to 250°F.
- Adjustable Sensitivity: Features an onboard screw for field-tuning the flow setpoint to match specific system velocities.
- NEMA 1 Enclosure: Provides standard protection for internal electrical components in indoor mechanical environments.
- High Versatility: The SPDT snap switch allows for flexible wiring to either start equipment on flow or signal an alarm upon flow loss.
Is this switch suitable for high-velocity systems?
No, this model is rated for a maximum velocity of 10 feet per second. Exceeding this limit can cause internal damage or inconsistent readings.
Can the FS5-1 be installed in vertical piping?
This switch is designed for horizontal pipe runs. Standard flow rates for actuation are calculated based on horizontal installation with at least five pipe diameters of straight run on both sides.
What is the maximum electrical load for the SPDT switch?
The switch is rated for 7.4 Amps at 120VAC or 3.7 Amps at 240VAC, making it compatible with most standard pilot duty and motor control circuits.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $390.56
-65%$390.56
$136.70McDonnell & Miller FS5-1 Switch
The McDonnell & Miller FS5-1 (Part Number 114780) is a rugged, 1 inch NPT In-Line Liquid Flow Switch engineered for high-sensitivity requirements in commercial and industrial hydronic systems. Built with a durable brass body and EPDM elastomer seals, this general-purpose switch features a snap-acting SPDT switch that facilitates reliable pump control and equipment protection by detecting flow velocities as low as 1.5 GPM. Performance remains consistent across a maximum operating pressure of 150 psi and fluid temperatures up to 250°F. Its unique in-line design eliminates the need for an external pipe tee, streamlining installation in tight mechanical rooms. For precise field requirements, a built-in sensitivity adjustment screw allows for fine-tuning the setpoint to prevent erratic cycling. This unit is frequently deployed as a boiler flow switch or to interlock chillers and heat exchangers, ensuring vital low flow protection for expensive HVACR components.
Key Benefits- In-Line Configuration: Direct mounting on 1" piping saves space and eliminates the cost of additional pipe tees.
- Broad Temperature Range: Maintains high performance in applications ranging from 32°F to 250°F.
- Adjustable Sensitivity: Features an onboard screw for field-tuning the flow setpoint to match specific system velocities.
- NEMA 1 Enclosure: Provides standard protection for internal electrical components in indoor mechanical environments.
- High Versatility: The SPDT snap switch allows for flexible wiring to either start equipment on flow or signal an alarm upon flow loss.
Is this switch suitable for high-velocity systems?
No, this model is rated for a maximum velocity of 10 feet per second. Exceeding this limit can cause internal damage or inconsistent readings.
Can the FS5-1 be installed in vertical piping?
This switch is designed for horizontal pipe runs. Standard flow rates for actuation are calculated based on horizontal installation with at least five pipe diameters of straight run on both sides.
What is the maximum electrical load for the SPDT switch?
The switch is rated for 7.4 Amps at 120VAC or 3.7 Amps at 240VAC, making it compatible with most standard pilot duty and motor control circuits.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The McDonnell & Miller FS5-1 (Part Number 114780) is a rugged, 1 inch NPT In-Line Liquid Flow Switch engineered for high-sensitivity requirements in commercial and industrial hydronic systems. Built with a durable brass body and EPDM elastomer seals, this general-purpose switch features a snap-acting SPDT switch that facilitates reliable pump control and equipment protection by detecting flow velocities as low as 1.5 GPM. Performance remains consistent across a maximum operating pressure of 150 psi and fluid temperatures up to 250°F. Its unique in-line design eliminates the need for an external pipe tee, streamlining installation in tight mechanical rooms. For precise field requirements, a built-in sensitivity adjustment screw allows for fine-tuning the setpoint to prevent erratic cycling. This unit is frequently deployed as a boiler flow switch or to interlock chillers and heat exchangers, ensuring vital low flow protection for expensive HVACR components.
Key Benefits- In-Line Configuration: Direct mounting on 1" piping saves space and eliminates the cost of additional pipe tees.
- Broad Temperature Range: Maintains high performance in applications ranging from 32°F to 250°F.
- Adjustable Sensitivity: Features an onboard screw for field-tuning the flow setpoint to match specific system velocities.
- NEMA 1 Enclosure: Provides standard protection for internal electrical components in indoor mechanical environments.
- High Versatility: The SPDT snap switch allows for flexible wiring to either start equipment on flow or signal an alarm upon flow loss.
Is this switch suitable for high-velocity systems?
No, this model is rated for a maximum velocity of 10 feet per second. Exceeding this limit can cause internal damage or inconsistent readings.
Can the FS5-1 be installed in vertical piping?
This switch is designed for horizontal pipe runs. Standard flow rates for actuation are calculated based on horizontal installation with at least five pipe diameters of straight run on both sides.
What is the maximum electrical load for the SPDT switch?
The switch is rated for 7.4 Amps at 120VAC or 3.7 Amps at 240VAC, making it compatible with most standard pilot duty and motor control circuits.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
