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Back-to-back seal
A back-to-back seal describes two shaft seals mounted back-to-back to provide a higher level of safety and reliability.
Backflow
The flow of piped medium in the direction opposite to normal flow is called backflow. It is caused by a difference in water pressures.
BACnet
BACnet is a data communication protocol for Building Automation and Control Networks. It is a standardised technology for building automation and supports a variety of specific physical network standards, which makes it ideal for use on all automation levels.
Baffle
The term baffle covers a flat board or plate, deflector vanes, guides, grids, gratings or similar devices constructed or placed in flowing water, wastewater or slurry systems.
Balance point
In any thermal heat exchange process, a mixture of two energy flows will result in a new stage or phase called the balance point. Here, a common temperature, humidity or enthalpy is reached.
Balancing valve
During commissioning of heating and cooling systems, hydraulic balance is often achieved using balancing valves; static or dynamic
Balancing
Balancing of heating and cooling systems is performed to ensure that the correct amount of water is present at all consumption points. Balancing is carried out by building balancing valves into the system, thereby adding adjustable resistance.
Biocide
Biocide is a chemical added to the make-up water for evaporative applications such as condensers and cooling towers.
Biofilm
Biofilm refers to a population of various micro-organisms trapped in a layer of slime and organic matter that attaches itself to the surfaces of pumps, pipes, walls etc.
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).