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Description
Powers restrictors are available in a variety of orifice sizes and connection types.

External types feature:
  • Air filter.
  • Threaded connection (Type 1).
  • Barbed connection (Types 2 and 3).
  • Color coding (Types 2 and 3).
  • Airflow direction arrow to minimize installation errors.
  • Airflow restrictor capacity molded (Types 2 and 3) or stamped (Type 1) on body.

    External restrictors are used:
    • for one-pipe transmitters, 40 scim (11 ml/sec).
    • when installed tubing lengths exceed maximum recommended value. and 2.
    • for one-pipe room thermostats, 20 scim (5.5 ml/sec).
    • with check valves to provide airflow time delays.
    • Slow to supply, fast to exhaust.
    • Fast to supply, slow to exhaust.
    • for VAV vortex control. Use 80 scim (22 ml/sec) restrictor in actuator control pressure line to prevent cycling.
    • when other air capacities, 10 scim (2.7 ml/sec), 80 scim (22 ml/sec) or 320 scim (87 ml/sec), are required to compensate for tubing size or response time.
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Manuals (1)
Specs
Material:
Copper
Connection Type:
Threaded
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