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BOD (Biochemical Oxygen Demand)
The quantity of oxygen consumed by aerobic microorganisms during the decomposition of organic matter in a water sample is defined as the Biochemical Oxygen Demand (BOD).
Boiler
Consumers who live in areas with no district heating have to use their own boiler to produce central heating. A boiler installation has the following components: burner, nozzles, boiler casing, hot-water tank (integrated or separate) and a chimney.
Boiler shunt
The primary task of the boiler shunt is to ensure that the difference in temperature between the top and the bottom of the boiler is not too high. A high temperature difference can cause tensions in the material and thus reduce the life of the boiler.
Brackish water
Brackish water is water that has more salinity than fresh water, but not as much as seawater.
Break Tank
Break tanks are implemented in boosting systems in order to supply the system if the mains supply becomes insufficient. Tanks are also implemented in series-connected boosting systems.
BTU (British Thermal Unit)
The British thermal unit (BTU) is a unit of energy used in the power, steam generation, heating and air-conditioning industries. In scientific contexts the BTU has largely been replaced by the SI unit of energy, the joule [J].
Buffer tank
A buffer tank is a storage tank used on the cold user side of an air-conditioning system. The tank is used as storage to cover peak loads or in situations when a surge in demand exceeds the capacity of the cooling system.
Butterfly valve
A butterfly valve is from a family of valves called quarter-turn valves. The butterfly is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway.
Bypass connection
Pipe connection between the suction and discharge side of a booster set in order to bypass water when the pumps are not in operation.