Home  Glossary  Resources  
 

Control and Instrumentation Glossary

Search for another term in our Glossary
    

 


Backlash
The relative movement of interlocked mechanical parts that occurs when motion is reversed.
Occasionally observed in valve actuators
Further Reading

 


Balance Ring
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.
Further Reading

 


Bandwidth
Data carrying capacity.

Further Reading

 


BASEEFA (2001)
British Approvals Service for Electrical Equipment in Flammable Atmospheres - UK based testing institute and Notified Body.

Further Reading

 


Baud Rate
Serial communications data transmission rate expressed in bits per second.

Further Reading

 


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.
Further Reading

 


Bipolar
A signal range that includes both positive and negative values e.g -5 V to +5 V

Further Reading

 


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.
Further Reading
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.

Further Reading

 


BOM
Bill Of Materials
A listing of materials for a job. The result of a Material Take Off.
Further Reading

 


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).

Further Reading

 


BPSD
Barrels per Stream Day - A unit of flow measurement used on refineries.

Further Reading

 


Breakdown Voltage
The voltage at which circuit components begin to be damaged.

Further Reading

 


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 ***.

Further Reading
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.

Further Reading

 


Bursting Disc
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.
Further Reading

 


Bus Bar
A conducting bar that carries heavy current to supply several electric circuits.

Further Reading

 


Byte
Eight related bits of data or an eight-bit binary number.
Also denotes the amount of memory required to store one byte of data.
Further Reading

 

Sponsored Links


Glossaries
 

Glossary

 
C&I Glossary
Relief Valve Glossary
Engineering Glossary
Nuclear Glossary
 

C&I Resources

 
ATEX
Cable Gland Selector
CE Marking
Flange Dimensions
Ingress Protection
Pipe Schedules
Relief Valve Orifice Size
Temperature Class
Temperature Conversion
Thermocouple Types
Valve Leakage
Vortex Meters
Wires and Cables

ControlAndInstrumentation.com

© Copyright 2006 - 2017. All rights reserved.