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Flow temperature
The flow temperature refers to the temperature of the water in the supply (flow) pipe in a heating system or separate part of a heating system. If a heating system is directly connected to the district heating system its flow temperature is set by the district heating provider.
Flow velocity
The flow velocity of a liquid in pipes varies across the cross-section of the pipe. The flow velocity profile depends on whether the flow is laminar or turbulent.
Fluoroelastomers
Fluoroelastomers (FKM) are one of the different types of rubber used as a packing material in shaft seals to prevent the pumped media from leaking.
Fluoroelastomers
Fluoroelastomers (FKM) are one of the different types of rubber used as a packing material in shaft seals to prevent the pumped media from leaking.
Foam sprinkler systems
Foam sprinkler systems use foam to extinguish fires in buildings. The fire sprinkler pump distributes the water & foam mixture via the pipe-system and discharges the foam spray via the sprinklers.
Free passage
The dimension of the free passage usually refers to the largest spherical object that may pass through the impeller.
Free release fire pump
Free release fire pumps are standard pumps used as fire pumps. These standard pumps are not made for fire pump application, which can cause poor functionality in a sprinkler-pump application due to risk of clogging and instabilities in System pressure.
Frequency converter
A frequency converter is an electric device that converts a current with one frequency to a current with another frequency. The voltage is normally the same before and after frequency conversion. Frequency converters are normally used for speed regulation of motors used to drive pumps and fans.
Galvanic corrosion
Galvanic corrosion occurs when a corrosive electrolyte and two metallic materials are in contact. This corrosion increases on the least noble material (the anode) and decreases on the noblest (the cathode).
Gas extinguishing systems
Gas extinguish systems have gas stored in self contained bottles, and when activated the gas reduces the oxygen levels to below the percentage needed for combustion or create a chemical reaction to break the “fire triangle” (heat, fuel, oxygen).