TAC Pneumatic Products Catalog

Air Motion Relay
This relay is used to sense suction and/or
discharge pressures across a coil or fan and
control pneumatic damper actuators or valves
piped downstream from this device. By the use of
sensing lines located at a fan suction and
discharge and piped to the low and high ports of
this relay, this device is able to detect whether or
not a fan is operating. This same operation can
also be detected by using one port of the R435 as a
reference port and piping the other port to the fan
suction or discharge providing there is a
differential pressure of at least 0.15 in. W.C.
Features:
• Useful for proving fan-operation pneumatically, without the
use of electrical devices.
• Originally designed for use with Unit-Ventilators, the R435
may be used to operate diverting relays (such as the R504
Series) for Air-Handling Unit Control Systems.
Model Chart
Model No.
Wholesale
Model No.
R435 2374-401 Air Motion Relay.
Specifications
Accessories
Description
Pressure output 3 to 15 psig (21 to 103 kPa).
Pressure input
Environment
Minimum 0.15 in. W.C.(373 Pa) differential.
Maximum ambient temperature 140�F (60�C).
Locations Avoid areas with excessive vibration or corrosive materials.
Supply air pressure Clean, dry, oil free air required (refer. EN-123).
Nominal 20 psig (103 kPa).
Maximum
Connections
30 psig (207 kPa).
LO/HI Ports 3/8 in. O.D. plastic tubing.
Signal 1/4 in. O.D. plastic tubing.
Maximum static pressure 12 in. W.C. (2988 Pa).
Main air consumption 27.6 scim (7.5 mL/s).
Air capacity 48 scim. (13.1 mL/s).
Mounting Transmitter must be mounted in a horizontal position with the correct side up.
Dimensions 5-9/16 H x 5-5/16 W x 2-11/16 D in. (141 x 135 x 69 mm).
Weight 0.5 lb. (227 g).
Model No. Description
AP-302 Static pressure tip — 1/4 in. O.D. tubing.
AP-305 Static pressure tip — 1/8 in. pipe thread.
R435 (2374-401)
F-27383-1 © Copyright 2006 TAC. All Rights Reserved. 81
R435
(2374-4