Patterson-Kelley 86-8350-0800 Flow Switch
The Patterson-Kelley 86-8350-0800 Flow Switch is a critical safety component designed for precise fluid flow monitoring in high-performance hydronic and steam systems. Engineered to protect commercial boilers and industrial process loops from low-flow or dry-fire conditions, this paddle-style flow switch utilizes a robust sensor mechanism to actuate a control circuit when system demand fluctuates. Constructed with a corrosion-resistant enclosure, the 86-8350-0800 ensures reliable signal transmission to the ENVI boiler control or other BMS interfaces, maintaining operational integrity in demanding mechanical rooms. Its industrial-grade design features high-sensitivity internals capable of detecting micro-movements in the water stream, making it a staple for HVAC part replacement in Patterson-Kelley Thermific and MACH series units. As a veteran-grade OEM replacement flow switch, it provides the exact electrical specifications and mechanical sizing required to interface with existing piping without field modification, ensuring the system returns to service with peak safety shutdown accuracy.
Key Benefits
- Ensures instantaneous boiler low-flow protection to prevent heat exchanger damage or catastrophic failure.
- Features a liquid flow detection paddle optimized for high-temperature hydronic applications and varied GPM ranges.
- Built with an industrial-grade housing that withstands the vibration and thermal cycling common in commercial boiler rooms.
- Directly compatible with Patterson-Kelley control boards, providing seamless integration for diagnostic and safety interlock strings.
- Optimized for low-pressure drop performance, maintaining system efficiency while providing critical flow switch actuation.
Common Questions
Can the 86-8350-0800 be mounted in any orientation?
For accurate water flow sensing, these switches are typically calibrated for horizontal pipe runs. Installing them vertically or near elbows can lead to turbulence-induced nuisance tripping or failure to calibrate properly.
How do I troubleshoot a "No Flow" error on the boiler display with this switch installed?
First, verify physical flow with a manual gauge. If flow is confirmed, check for mineral buildup on the paddle or use a multimeter to verify continuity across the switch contacts during pump operation. HVAC contractors often find that debris in the line is the primary cause of mechanical sticking.
Is this switch compatible with glycol-based systems?
Yes, the materials used in the 86-8350-0800 are compatible with standard percentages of propylene and ethylene glycol commonly used in closed-loop hydronic systems, provided the fluid viscosity remains within industrial flow switch design parameters.
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: $406.83
-65%$406.83
$142.39Patterson-Kelley 86-8350-0800 Flow Switch
The Patterson-Kelley 86-8350-0800 Flow Switch is a critical safety component designed for precise fluid flow monitoring in high-performance hydronic and steam systems. Engineered to protect commercial boilers and industrial process loops from low-flow or dry-fire conditions, this paddle-style flow switch utilizes a robust sensor mechanism to actuate a control circuit when system demand fluctuates. Constructed with a corrosion-resistant enclosure, the 86-8350-0800 ensures reliable signal transmission to the ENVI boiler control or other BMS interfaces, maintaining operational integrity in demanding mechanical rooms. Its industrial-grade design features high-sensitivity internals capable of detecting micro-movements in the water stream, making it a staple for HVAC part replacement in Patterson-Kelley Thermific and MACH series units. As a veteran-grade OEM replacement flow switch, it provides the exact electrical specifications and mechanical sizing required to interface with existing piping without field modification, ensuring the system returns to service with peak safety shutdown accuracy.
Key Benefits
- Ensures instantaneous boiler low-flow protection to prevent heat exchanger damage or catastrophic failure.
- Features a liquid flow detection paddle optimized for high-temperature hydronic applications and varied GPM ranges.
- Built with an industrial-grade housing that withstands the vibration and thermal cycling common in commercial boiler rooms.
- Directly compatible with Patterson-Kelley control boards, providing seamless integration for diagnostic and safety interlock strings.
- Optimized for low-pressure drop performance, maintaining system efficiency while providing critical flow switch actuation.
Common Questions
Can the 86-8350-0800 be mounted in any orientation?
For accurate water flow sensing, these switches are typically calibrated for horizontal pipe runs. Installing them vertically or near elbows can lead to turbulence-induced nuisance tripping or failure to calibrate properly.
How do I troubleshoot a "No Flow" error on the boiler display with this switch installed?
First, verify physical flow with a manual gauge. If flow is confirmed, check for mineral buildup on the paddle or use a multimeter to verify continuity across the switch contacts during pump operation. HVAC contractors often find that debris in the line is the primary cause of mechanical sticking.
Is this switch compatible with glycol-based systems?
Yes, the materials used in the 86-8350-0800 are compatible with standard percentages of propylene and ethylene glycol commonly used in closed-loop hydronic systems, provided the fluid viscosity remains within industrial flow switch design parameters.
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.
Product Information
Product Information
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Shipping & Returns
Description
The Patterson-Kelley 86-8350-0800 Flow Switch is a critical safety component designed for precise fluid flow monitoring in high-performance hydronic and steam systems. Engineered to protect commercial boilers and industrial process loops from low-flow or dry-fire conditions, this paddle-style flow switch utilizes a robust sensor mechanism to actuate a control circuit when system demand fluctuates. Constructed with a corrosion-resistant enclosure, the 86-8350-0800 ensures reliable signal transmission to the ENVI boiler control or other BMS interfaces, maintaining operational integrity in demanding mechanical rooms. Its industrial-grade design features high-sensitivity internals capable of detecting micro-movements in the water stream, making it a staple for HVAC part replacement in Patterson-Kelley Thermific and MACH series units. As a veteran-grade OEM replacement flow switch, it provides the exact electrical specifications and mechanical sizing required to interface with existing piping without field modification, ensuring the system returns to service with peak safety shutdown accuracy.
Key Benefits
- Ensures instantaneous boiler low-flow protection to prevent heat exchanger damage or catastrophic failure.
- Features a liquid flow detection paddle optimized for high-temperature hydronic applications and varied GPM ranges.
- Built with an industrial-grade housing that withstands the vibration and thermal cycling common in commercial boiler rooms.
- Directly compatible with Patterson-Kelley control boards, providing seamless integration for diagnostic and safety interlock strings.
- Optimized for low-pressure drop performance, maintaining system efficiency while providing critical flow switch actuation.
Common Questions
Can the 86-8350-0800 be mounted in any orientation?
For accurate water flow sensing, these switches are typically calibrated for horizontal pipe runs. Installing them vertically or near elbows can lead to turbulence-induced nuisance tripping or failure to calibrate properly.
How do I troubleshoot a "No Flow" error on the boiler display with this switch installed?
First, verify physical flow with a manual gauge. If flow is confirmed, check for mineral buildup on the paddle or use a multimeter to verify continuity across the switch contacts during pump operation. HVAC contractors often find that debris in the line is the primary cause of mechanical sticking.
Is this switch compatible with glycol-based systems?
Yes, the materials used in the 86-8350-0800 are compatible with standard percentages of propylene and ethylene glycol commonly used in closed-loop hydronic systems, provided the fluid viscosity remains within industrial flow switch design parameters.
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.
