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Overview

Three-port relays are used in HVAC systems, to perform a variety of relay functions, such as; transmit the higher of two input signals, lock out one pressure signal when a second signal is higher, or transmit the lower of two pressure signals.

Features

  • Uses diaphragm-logic technology.
  • In-line, wall, or panel mounted.
  • Sharp-barb air connections.
  • Molded plastic construction.

Product Specifications

Application
Pneumatic Three-port Selector Relay
Dimensions (in.)
1 1/2 in. diameter x 1 in. deep
Dimensions (mm)
38 mm diameter x 25 mm deep
Maximum Safe Operating Pressure (psi)
30 psi, maximum
Maximum Safe Operating Pressure (kPa)
205 kPa, maximum
Temperature Range (F)
0 F to 140 F
Temperature Range (C)
-18 C to +60 C
Includes
14003030-001, 1 1/2 in. Mounting Clip for Mounting relay to wall or panel
Mounting
Wall or In-line or panel
Operating Humidity Range (% RH)
5 to 95% RH
Pressure Range (psi)
Input Operating--0 to 20 psi
Pressure Range (kPa)
Input Operating--0 to 138 kPa
Air connections
Barb fittings 5/32 in. (4 mm) O.D. plastic tubing
Capacity
0.039 scfm at 1 psi differential (18 mL/s at 5 kPa differential)
Operation
Lockout,Lower-of-two pressures,repeater relay
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