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Roof tank systems
Roof tanks are fresh water tanks, placed atop high-rise buildings.
Return temperature
Return temperature is a term describing the return water temperature in a heating system.
Rotating part of shaft seal
The rotating part of the seal is fixed on the pump shaft and rotates in the liquid during pump operation.
Rubber
Rubber is used as a part of the shaft seals that prevent the pumped media from running out of the pump.
Safety valve
Relief valves are used to protect against the build up of excessive pressure in a closed system.
Saturation
The saturation point is the point at which air is unable to absorb more water.
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.
Secondary refrigerant
Coolant can be divided into primary coolant and secondary coolant.
Sedimentation
A process in which solid particles with a density greater than water settle out of the water phase due to gravity.