Control and Instrumentation Glossary
We have 18 entries in our Glossary for this letter.
The relative movement of interlocked mechanical parts that occurs when motion is reversed.
Occasionally observed in valve actuators
Similar to a Mono Flange but without the transition. It incorporates either a drain valve or a drain vent.
Often used to simplify Diaphragm seal installations.
Data carrying capacity.
British Approvals Service for Electrical Equipment in Flammable Atmospheres - UK based testing institute and Notified Body.
Serial communications data transmission rate expressed in bits per second.
bbl - Barrel
A volumetric unit of measure for crude oil and petroleum products. Derived by the original use of spent whiskey barrels to hold oil in the 1800s.
One barrel equals 42 U.S. gallons, equivalent to 158.978 litres.
A signal range that includes both positive and negative values e.g -5 V to +5 V
BOD - BiologicaL Oxygen Demand
The amount of oxygen used for biochemical oxidation by a unit volume of water at a given temperature and for a given time.
Used as an index of the degree of organic pollution in water.
Chemical Oxygen Demand
BoE - Barrel of Oil Equivalent
A measure of gas. A BoE has similar energy content as a barrel of Oil. Approx 167 MMscf depending on calorific value of the gas.
Bill Of Materials
A listing of materials for a job. The result of a Material Take Off.
BOPD - Barrels of Oil per Day
Unit of measurement of crude oil produced by a well or a field. The volume of a barrel is equivalent to 42 US gallons (0.16 metres cubed).
Barrels per Stream Day - A unit of flow measurement used on refineries.
The voltage at which circuit components begin to be damaged.
BSI - British Standards Institution
Responsible for the preparation of UK National Standards prefixed BS *** and publication of harmonised standards in the UK prefixed BS EN ***.
British Standards Website
BTU - British Thermal Unit
A unit of energy i.e. the amount of energy required to raise the temperature of 1 pound of water 1 degree Fahrenheit when the water is near 39.2 degrees Fahrenheit.
A non-reclosing element designed to burst or rupture at a predetermined pressure to protect systems or individual plant from unacceptable levels of pressure or vacuum.
Bursting discs are sometimes called rupture discs.
A conducting bar that carries heavy current to supply several electric circuits.
Eight related bits of data or an eight-bit binary number.
Also denotes the amount of memory required to store one byte of data.
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