The Barber Colman PF-306 is a floating differential pressure switch designed for monitoring and controlling air pressure differentials in HVAC systems and cleanroom environments. It is suitable for applications requiring reliable detection of pressure changes to actuate control systems.
Technical Specifications
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Model: PF-306
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Type: Floating differential pressure switch
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Setpoint Range: 0.04 to 0.32 kPa (0.2 to 1.3 inches of water)
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Null Span Adjustment: 0.01 to 0.03 kPa (0.05 to 0.13 inches of water)
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Velocity Range: 9 to 23 m/s (1800 to 4600 FPM) at 21°C (70°F)
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Maximum Pressure: 7 kPa (28 inches of water)
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Switch Type: Single-Pole Double-Throw (SPDT) floating contact
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Electrical Rating: 1.0 amp at 24 VAC
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Ambient Temperature Range: -29°C to 60°C (-20°F to 140°F)
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Housing: All-metal construction with conduit opening for 13 mm (1/2 inch) conduit fitting
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Pressure Connections: Barbed connections for high and low pressure inputs, suitable for 9 mm (3/8 inch) O.D. tubing
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Mounting Orientation: Diaphragm must be mounted vertically on a vibration-free surface
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Dimensions: 130 mm (5-1/8 inches) high, 120 mm (4-3/4 inches) wide, 111 mm (4-3/8 inches) deep
Key Features
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Adjustable setpoint and null span for precise control
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SPDT floating contact suitable for various control applications
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Robust metal housing for durability
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Designed for air and non-combustible gases
Compatible Applications
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Static pressure control in cleanrooms and hospital environments
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Draft and exhaust damper control in HVAC systems
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Liquid level control in closed tanks
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Air velocity monitoring in duct systems
Installation & Maintenance Notes
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Mount the unit with the diaphragm in a vertical plane on a vibration-free surface
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Use appropriate static pressure probes (e.g., AP-301 or AP-305) for accurate measurements
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Connect high and low pressure inputs using 3/8 inch O.D. plastic tubing
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Ensure electrical connections comply with local codes and standards
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Regularly inspect the unit for signs of wear or damage
We ship this product worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance.