FCD’s - Quia€“NTC –Ceramic semiconductor Temperature •RTD’s –Resistance temperature...
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FCD’s • Control Dampers – Opposed blade dampers
Transcript of FCD’s - Quia€“NTC –Ceramic semiconductor Temperature •RTD’s –Resistance temperature...
Flow characterisitics
• Linear valve – 40%
open 40% flow
• Equal % - best at 50 –
100%, HW and CW
• Quick opening – two
position
Temperature
• RTD’s
– Resistance temperature dectors
– Thin film of pure metal
– Relatively linear
– About .18 degree drift per year
– High cost