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A thermometer whose sensitive element has been made to approximate a black body by covering it with lampblack. |
Related Terms |
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CASING
A covering of sheets of metal or other material such as fire resistant composition board used to enclose all or a portion of a steam-generating unit. |
PROPORTIONAL CONTROL
A mode of control in which there is a continuous linear relation between value of the controller variable and position of the final control element (modulating control). |
SILICA
A scale-forming element found in some boiler feedwaters. |
BEARING CREEP
Area of rolling element changes. Inner race slowly creeps around shaft. |
BRIDGING
A condition of filter element loading in which contaminant spans the space between adjacent sections of a filter element, thus blocking a portion of the useful filtration. |
BUBBLE POINT
The differential gas pressure at which the first steady stream of gas bubbles is emitted from a wetted filter element under specified test conditions. |
BURST PRESSURE RATING
The maximum specified inside-out differential pressure that can be applied to a filter element without outward structural or filter-medium failure. |
CARBON
A non-metallic element - No. 6 in the periodic table. Diamonds and graphite are pure forms of carbon. Carbon is a constituent of all organic compounds. It also occurs in combined form in many inorganic substances; i.e., carbon dioxide, limestone, etc. |
CLEANABLE
A filter element which, when loaded, can be restored by a suitable process, to an acceptable percentage of its original dirt capacity. |
CEILING
A covering usually of wood, placed over the tank top for its protection |