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“According to “ components for fire protection
“According to” components for fire protection, are products or fire pump sets which are built according to specifications written in fire protection standards – for example “according to NFPA 20”. These products are not listed and haven’t been evaluated by a listing laboratory.
2-way valve
The purpose of a 2-way control valve is to shut off water flow or to control and regulate flow through a pipe.
3-way valve
The purpose of a 3-way control valve is to shut off water flow in one pipe while opening water flow in another pipe, to mix water from two different pipes into one pipe, or to separate water from one pipe into two different pipes.
Abrasive liquids
An abrasive liquid contains substances, often minerals or inorganic substances, that are harder than the material they rub against. This abrasion will wear out and damage softer materials.
Acceptance test of sprinkler systems
An acceptance test of sprinkler systems is to ensure the functionality and performance of the fire sprinkler system is in accordance with design requirements.
Adaptation
As “mitigation” means working to reduce greenhouse gases, “adaption” contrasts by focussing the efforts on trying to control the environmental damage instead of trying to reduce it.
Aerobic
In wastewater transport and treatment aerobic means that oxygen is available and that it can be used as an oxidation agent in the degradation of organic matter.
Air cooler
The function of an air cooler is similar to that of an evaporator. What makes it different is the type of cooling medium it uses. An air cooler is a heat exchanger used to cool and/or dehumidify the air.
Air Handling Unit (AHU)
An Air Handling Unit (AHU) is used to re-condition and circulate air as part of a heating, ventilating and air-conditioning system.
Air heating
A heating system in a building can be based on radiators, convectors, floor heating, air heating or a combination of these. Using air heating is a fast but expensive way to heat up a building.