Typical Life

Pneumatic Cylinder Actuator

20 years

Electronic Actuator - oil-filled motor style

10-15 years

Electronic Actuator - mini hydraulic

5 years

Open-air direct coupled electric actuators

5-7 years

Residential style electric "clock motor" valve actuator with stalling motor

5 years

VAV box controller with built-in actuator

5-7 years

Low range differential air pressure sensor, analog

5 years

Specialty sensors (humidity, C02)

5 years

Economizer dampers

10 years

Globe controi valve with adjustable packinq

15 years

Analog electronic controls, in general

7-10 years

DDC controls, before technology advances render them obsolete, working or not

7-10 years

Figure 22.14 Typical Control Equipment Life Spans

Figure 22.14 Typical Control Equipment Life Spans

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