McDonnell & Miller FS8-WJ Switch
The McDonnell & Miller FS8-WJ Flow Switch (Part Number: 120602) is a heavy-duty, NEMA 4X rated flow switch engineered for high-demand hydronic and industrial fluid monitoring. This liquid flow switch features a 1" BSPT connection and is built with sealed Monel bellows to ensure reliable operation in corrosive or wash-down environments where standard enclosures fail. Operating at a maximum pressure of 160 PSI and temperatures up to 225°F, the FS8-WJ utilizes a high-capacity SPDT snap switch for precise flow detection and equipment interlocking.
Every McDonnell & Miller 120602 kit includes four stainless steel paddles (1", 2", 3", and 6"), allowing for versatile field installation across various pipe diameters. The integrated sensitivity adjustment screw gives technicians the ability to calibrate the flow setpoints to meet specific system requirements, whether used for boiler low-flow protection, cooling tower pump sequencing, or water treatment monitoring. This unit serves as a direct upgrade for contractors looking for BSPT threaded flow switches that meet water-tight and dust-tight specifications.
Key Technical Benefits:
- NEMA 4X Enclosure: Provides superior protection against moisture and corrosion in industrial settings.
- Universal Paddle Set: Comes with 1", 2", 3", and 6" stainless steel paddles for immediate compatibility with multiple line sizes.
- Field Calibratable: Features an external sensitivity screw for fine-tuning the switch actuation without dismantling the unit.
- Robust Materials: Monel bellows and stainless steel components provide extended service life in hydronic systems.
- High Temperature Rating: Capable of managing fluid temperatures up to 225°F (107°C) for high-temperature water applications.
Common Technical Questions:
Can the FS8-WJ be installed in horizontal or vertical piping?
Yes, this McDonnell & Miller flow switch can be installed in both horizontal and vertical upward-flow piping. It is not recommended for vertical downward-flow unless the flow rate is high enough to overcome gravity on the paddle.
What is the difference between this and the standard FS8-W?
The 'J' suffix designates the 1" BSPT thread configuration, which is essential for international equipment or specific threaded components common in certain industrial specs, whereas the standard model uses NPT.
Is this switch suitable for low-flow applications?
While designed as a general-purpose liquid flow switch, the sensitivity adjustment allows for calibration to lower flow rates, but it is critical to verify the required GPM against the provided flow rate charts for your specific pipe size.
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: $324.23
-65%$324.23
$113.48McDonnell & Miller FS8-WJ Switch
The McDonnell & Miller FS8-WJ Flow Switch (Part Number: 120602) is a heavy-duty, NEMA 4X rated flow switch engineered for high-demand hydronic and industrial fluid monitoring. This liquid flow switch features a 1" BSPT connection and is built with sealed Monel bellows to ensure reliable operation in corrosive or wash-down environments where standard enclosures fail. Operating at a maximum pressure of 160 PSI and temperatures up to 225°F, the FS8-WJ utilizes a high-capacity SPDT snap switch for precise flow detection and equipment interlocking.
Every McDonnell & Miller 120602 kit includes four stainless steel paddles (1", 2", 3", and 6"), allowing for versatile field installation across various pipe diameters. The integrated sensitivity adjustment screw gives technicians the ability to calibrate the flow setpoints to meet specific system requirements, whether used for boiler low-flow protection, cooling tower pump sequencing, or water treatment monitoring. This unit serves as a direct upgrade for contractors looking for BSPT threaded flow switches that meet water-tight and dust-tight specifications.
Key Technical Benefits:
- NEMA 4X Enclosure: Provides superior protection against moisture and corrosion in industrial settings.
- Universal Paddle Set: Comes with 1", 2", 3", and 6" stainless steel paddles for immediate compatibility with multiple line sizes.
- Field Calibratable: Features an external sensitivity screw for fine-tuning the switch actuation without dismantling the unit.
- Robust Materials: Monel bellows and stainless steel components provide extended service life in hydronic systems.
- High Temperature Rating: Capable of managing fluid temperatures up to 225°F (107°C) for high-temperature water applications.
Common Technical Questions:
Can the FS8-WJ be installed in horizontal or vertical piping?
Yes, this McDonnell & Miller flow switch can be installed in both horizontal and vertical upward-flow piping. It is not recommended for vertical downward-flow unless the flow rate is high enough to overcome gravity on the paddle.
What is the difference between this and the standard FS8-W?
The 'J' suffix designates the 1" BSPT thread configuration, which is essential for international equipment or specific threaded components common in certain industrial specs, whereas the standard model uses NPT.
Is this switch suitable for low-flow applications?
While designed as a general-purpose liquid flow switch, the sensitivity adjustment allows for calibration to lower flow rates, but it is critical to verify the required GPM against the provided flow rate charts for your specific pipe size.
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 FS8-WJ Flow Switch (Part Number: 120602) is a heavy-duty, NEMA 4X rated flow switch engineered for high-demand hydronic and industrial fluid monitoring. This liquid flow switch features a 1" BSPT connection and is built with sealed Monel bellows to ensure reliable operation in corrosive or wash-down environments where standard enclosures fail. Operating at a maximum pressure of 160 PSI and temperatures up to 225°F, the FS8-WJ utilizes a high-capacity SPDT snap switch for precise flow detection and equipment interlocking.
Every McDonnell & Miller 120602 kit includes four stainless steel paddles (1", 2", 3", and 6"), allowing for versatile field installation across various pipe diameters. The integrated sensitivity adjustment screw gives technicians the ability to calibrate the flow setpoints to meet specific system requirements, whether used for boiler low-flow protection, cooling tower pump sequencing, or water treatment monitoring. This unit serves as a direct upgrade for contractors looking for BSPT threaded flow switches that meet water-tight and dust-tight specifications.
Key Technical Benefits:
- NEMA 4X Enclosure: Provides superior protection against moisture and corrosion in industrial settings.
- Universal Paddle Set: Comes with 1", 2", 3", and 6" stainless steel paddles for immediate compatibility with multiple line sizes.
- Field Calibratable: Features an external sensitivity screw for fine-tuning the switch actuation without dismantling the unit.
- Robust Materials: Monel bellows and stainless steel components provide extended service life in hydronic systems.
- High Temperature Rating: Capable of managing fluid temperatures up to 225°F (107°C) for high-temperature water applications.
Common Technical Questions:
Can the FS8-WJ be installed in horizontal or vertical piping?
Yes, this McDonnell & Miller flow switch can be installed in both horizontal and vertical upward-flow piping. It is not recommended for vertical downward-flow unless the flow rate is high enough to overcome gravity on the paddle.
What is the difference between this and the standard FS8-W?
The 'J' suffix designates the 1" BSPT thread configuration, which is essential for international equipment or specific threaded components common in certain industrial specs, whereas the standard model uses NPT.
Is this switch suitable for low-flow applications?
While designed as a general-purpose liquid flow switch, the sensitivity adjustment allows for calibration to lower flow rates, but it is critical to verify the required GPM against the provided flow rate charts for your specific pipe size.
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.
