Accessory List

PF-30x Series
F-27382-1 © Copyright 2006 TAC. All Rights Reserved. 203
Floating Pressure Air Flow Switch
Model Chart
Specifications
These switches are used with reversible electric
actuators to control differential pressures, low
static pressures, or air velocities in duct systems.
Features:
• Low static control for ±0.5 in. control unit.
• Built-in arc suppression.
• Liquid level control usability.
• Highly reliable product.
• Universal mounting.
Model No.
Differential Pressure Setpoint
Range in. (mm) of Water
Adjustable Null Span
a
a
Minimum null is with 0.005 in. (0.13 mm) contact gap. Maximum null is with 0.025 in. (0.63 mm) contact gap.
Velocity Range fpm (m/s)
70°F (21°C) Air
At Minimum Setpoint
in. (mm) of Water
At Maximum Setpoint
in. (mm) of Water
PF-305 -0.5 to +0.5 (-12.7 to +12.7) 0.06 to 0.14 (1.5 to 3.5) 0.07 to 0.14 (1.8 to 3.5) 400 to 2800 (2 to 14)
PF-306 0.2 to 1.3 (5.1 to 33) 0.05 to 0.13 (1.3 to 3.3) 0.13 to 0.28 (3.3 to 7.1) 1800 to 4600 (9 to 23)
PF-307 1.1 to 3.5 (27.9 to 88.9) 0.06 to 0.17 (1.5 to 4.3) 0.11 to 0.31 (2.8 to 7.9) 4200 to 7500 (21 to 38)
PF-308 3.2 to 10 (81.3 to 254) 0.12 to 0.4 (3.0 to 10.2) 0.24 to 0.8 (6.1 to 20.3) 7200 to 14000 (37 to 71)
Differential pressure setpoint range Refer to Model Chart.
Sensing element Silicone rubber coated polyester diaphragm.
Adjustable null span Refer to Model Chart.
Maximum pressure
Differential 12 in. (305 mm).
Input 28 in. (711 mm).
Environment
Ambient temperature limits
Shipping and storage: -40 to 140°F (-40 to 60°C).
Operating: 35 to 140°F (0 to 60°C).
Humidity 5 to 95% RH, non-condensing.
Locations NEMA Type 1.
Electrical switch
Type Floating SPDT. Integral arc suppression.
Ratings 1.0 amps at 24Vac
Connections Refer to Figure 1.
Wiring Coded screw terminals.
Air pressure taps Barbed fittings for 3/8 in. O.D. plastic tubing, one high and one low.
Case All metal with 1/2 in. conduit opening.
Mounting In vertical position on any surface free of vibration.
Dimensions 5-1/8 H x 4-3/4 W x 4-3/8 D in. (130 x 121 x 111 mm).
General Instructions Refer to F-17492.
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