butterfly valve

(redirected from butterfly damper)
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Words related to butterfly valve

a valve in a carburetor that consists of a disc that turns and acts as a throttle

References in periodicals archive ?
Empirical Parameter for Primary Airflow Model with Butterfly Damper Damper BF8 ([R.sup.2] = 0.992) BF12 ([R.sup.2] = 0.956) Angle [a.sub.1] [b.sub.1] [a.sub.1] [b.sub.1] 0[degrees] to -14.1 0.0129 -15.06 -0.0065 9[degrees] 9[degrees] to -14.295 0.0461 -14.963 0.0535 54[degrees] 54[degrees] to -8.0979 -0.066 -13.992 0.0328 72[degrees] Table 4.
EPA (Source: ASHRAE 2001) Contaminant Long Term Short Term Concentration Concentration Averaging, ppm Averaging, ppm Sulfur Dioxide 0.03 1 year 0.14 24 hours Carbon Monoxide 35 1 hour Carbon Monoxide 9 8 hours The exhaust airflow would be controlled with butterfly damper exhaust valves.
* Blade or butterfly dampers. These dampers are coupled with one of three common flow-monitoring systems (again ranked from most to least costly and sensitive):