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Safety valve
Relief valves are used to protect against the build up of excessive pressure in a closed system. The liquid in a closed system changes volume when the temperature of the liquid changes.
Saturation
The saturation point is the point at which air is unable to absorb more water. Saturation point can also be referred to as dew point. It can also be stated that a saturated liquid, such as water or a saturated vapour, contains the maximum amount of heat energy without boiling or condensing.
Screen basket
A screen basket is a device used to retain or remove suspended or floating solids in flow stream to protect pumps, valves etc. from damage or clogging.
Screw compressor
Screw compressors are often used in connection with cooling systems. A screw compressor draws in coolant fumes continually, while some other compressor types draw in portions.
Secondary refrigerant
Coolant can be divided into primary coolant and secondary coolant. A secondary coolant is generally non-toxic in small amounts, though larger amounts must be disposed of appropriately.
Sedimentation
A process in which solid particles with a density greater than water settle out of the water phase due to gravity.
Selective corrosion
Selective corrosion is a type of corrosion which attacks one single element of an alloy and dissolves the element in the alloy structure.
Sensible cooling load
Sensible cooling load is a measurement of the amount of energy that must be removed from, for example, the air inside a building, in order to maintain a certain temperature, regardless of the temperature outside. Cooling load must be taken into account, when calculating the capacity of a cooling system.
Sensible heat ratio
Sensible heat ratio (SHR) is the term used to describe the ratio of sensible heat load to total heat load.
Sewer system
A sewer system comprises a network of pipelines that collect and transport waste- and stormwater to a wastewater treatment plant or the receiving waters.