Cleveland Controls FS-751-385 Switch

The Cleveland Controls FS-751-385 Switch is a fixed set point air flow switch engineered for precision monitoring of air or non-corrosive combustion by-products. This SPDT air pressure switch is factory-calibrated to actuate on a pressure rise of 0.05" ± 0.02" w.c., providing critical proof-of-flow for HVAC and ventilation sequences. Built with a robust diaphragm designed for vertical mounting, the FS-751-385 handles a wide electrical range from 120-277 VAC, making it a versatile drop-in for diverse commercial and industrial control circuits. With barbed connections for easy tubing integration and a maximum pressure rating of 0.5 PSI, this unit ensures reliable switching in environments where air quality and equipment protection are paramount. The internal silicone diaphragm is compatible with standard air and combustion gases, ensuring consistent performance between -40°F and 180°F.

Key Benefits for Contractors:

• Precision Calibration: Fixed 0.05" w.c. set point eliminates the risk of field adjustment errors, ensuring the HVAC air flow sensor operates exactly to spec.
• Broad Voltage Compatibility: Rated for 120 to 277 VAC, reducing the need to carry multiple differential pressure switch models in your service van.
• Durable Construction: Features screw terminals and barbed connections for secure air flow switch installation in high-vibration environments.
• Safety Compliance: Ideal for monitoring combustion by-products, protecting heat exchangers and burners from low-flow conditions.

Common Questions:

Can the FS-751-385 be mounted in any orientation?
No, for the 0.05" w.c. set point to remain accurate, the Cleveland Controls FS-751-385 must be mounted with the diaphragm in a vertical position.

What happens if the pressure exceeds 0.5 PSI?
This low pressure air switch is rated for a maximum of 0.5 PSI (13.8" w.c.). Exceeding this limit can damage the internal silicone diaphragm and compromise the switching mechanism.

Is this switch suitable for corrosive gases?
The unit is designed for air or combustion by-products that do not degrade silicone. Avoid use with heavily corrosive chemicals that could attack the internal components.

Safety Information:
California Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

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.