Cleveland Controls DFS-448-112 Switch

The Cleveland Controls DFS-448-112 is a precision-engineered fixed set point air pressure sensing switch designed for critical proving applications in duct heaters, ovens, and energy management systems. Built with a robust plated housing and a high-grade silicone diaphragm, this SPDT air flow switch is factory-calibrated to actuate on a pressure rise of 0.05" ± 0.02" w.c. Its compact, open-mount design with a flat strap bracket makes it an ideal choice for contractors performing surface-mount installations in tight spaces where internal access is restricted. The unit features dual-barbed sample line connectors that accommodate 3/16" or 1/4" ID flexible tubing, allowing for versatile sensing of positive, negative, or differential air pressure. With an electrical rating of up to 277Vac and 15A non-inductive load, this HVAC blower proving switch ensures reliable performance across a standard operating temperature range of -40°F to 180°F.

• Versatile Application: Engineered to monitor positive, negative, or differential pressure in complex HVACR and industrial combustion environments.
• Simplified Wiring: Equipped with standard 1/4" 90-degree quick-connect spade terminals for fast and secure electrical termination.
• Durable Construction: The zinc-plated steel housing and silicone components are designed to withstand air and combustion by-products without degradation.
• Consistent Calibration: Features a fixed set point of 0.05" w.c., eliminating the risk of field tampering or shifting set points in high-vibration environments.
• Broad Compatibility: Supports a wide voltage range from 120V to 277Vac, making it a universal fit for various commercial air pressure sensing needs.

Can the DFS-448-112 be mounted in any orientation?
To maintain the specified 0.05" w.c. set point, the switch must be mounted with the diaphragm in a vertical plane. Mounting it horizontally or with the sample line connections facing up may cause inaccuracies in pressure detection.

What tubing is compatible with the barbed connectors?
The integrated dual-barbed connectors are designed to provide a leak-proof seal with both 3/16" and 1/4" ID flexible tubing, ensuring reliable differential pressure monitoring.

Is this switch suitable for high-temperature exhaust applications?
The DFS-448-112 is rated for operating temperatures up to 180°F and is compatible with combustion by-products that do not chemically degrade silicone, making it suitable for most standard oven and duct heater proving 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.