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Feedback value transmitter

A feedback value transmitter is a sensor that converts the control variable into a standard electric ...

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Feed funnel valve

A feed funnel valve is employed for smaller pumps with foot valves to manually vent the suction line ...

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Feed pump

Feed pumps are also referred to as boiler feed pumps.

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Fibrous material

Fibrous material is also called pulp and is the collective term used to describe pulp and wood pulp.

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Field bus

The field bus is a bus system that is used for communicating in automation systems to enable the ...

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Field level

Field level: Example of an automation pyramid

The field level is also referred to as the sensor or actuator level and represents the lowest level ...

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Filter

Filters are found in many different fields. For example, in electronics they are electrical circuits ...

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Fire-fighting pump

A fire-fighting pump is a centrifugal pump which is used for pumping fire-fighting water.

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Firmware

Firmware refers to a microprogram that the manufacturer implements as hardware-specific software in ...

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Fitting

Fittings in a centrifugal pump system comprise all piping components which function to change the ...

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Flange

Flanges are used in piping construction to connect two pipe sections to one another, or to connect ...

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Flanged motor pump

A flanged motor pump is an alternative to a close-coupled pump. It is installed on motor feet rather ...

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Flange standard

A flange standard lays down the dimensions, surface finish, facing type, marking, material and ...

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Flange type

Flange types may vary significantly depending on the application. The faces of flanges used with ...

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Flat belt drive

The flat belt drive is a belt drive characterised by the fact that its belt is flat. The belt can be ...

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Float switch

The float switch is a measuring instrument (also see Sensor) that automatically controls the fill ...

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Flow (through a section)

Flow through a section is a variable used to measure the quantity of a flowing fluid. A distinction ...

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Flow coefficient

The flow coefficient (φ) is a dimensionless quantity used to describe the volume flow rate. It is ...

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Flow controller

In pump engineering, flow controllers, often also referred to as flow monitors, serve to monitor and ...

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Flow line

The term flow line denotes the circular projection of a stream line in the meridional section plane ...

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Flow measurement

Flow measurement: MID measuring principle

Flow measurement refers to the process of quantifying the flow of a fluid as it travels through a ...

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Flow monitoring

Flow monitors are used to protect pumps from overheating when they are not delivering fluids. Brief ...

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Flow profile

The flow profile, also referred to as the vane profile, results from the intersection of the flow ...

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Flow rate

The flow rate (Q) of a centrifugal pump is the useful volume flow delivered by the pump via its ...

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Flow separation

In aero- and hydrodynamics flow separation describes a flow condition in which the flow becomes ...

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Flow straightener

In pumping systems flow straighteners are used to reduce the swirl components in a fluid flow (also ...

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Flow velocity

Flow velocity is the velocity of a defined movement of a fluid in a given space and, in the case of ...

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Flow velocity in a cross-section

The flow velocity (v) in a cross-section is the volumetrically averaged flow velocity in a specific ...

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Flue gas desulphurisation system

Flue gas desulphurisation system: Absorber circulating pump with channel impeller and CPS (CeramicPolySiC) lining

In a flue gas desulphurisation system (FGD), sulphur compounds are removed from the exhaust emissions ...

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Fluid

The word fluid is the generic term denoting gases and vapours (compressible), as well as fluids ...

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Fluid coupling

The fluid coupling consists of a pump impeller (on the input shaft) and a runner (on the output shaft).

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Fluid mechanics

Fluid mechanics is the science of liquid and gaseous media in motion (see Fluid). Within the context ...

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Foot valve

The foot valve is a lift check valve which is usually installed together with suction strainers in ...

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Force

Force is a vectorial (directional) magnitude from mechanics and is the cause of the acceleration or ...

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Formation of air pockets

The term "formation of air pockets" describes the accumulation of air bubbles in certain areas inside ...

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Fouling

In water management the process of fouling describes the deposition of particles on wetted surfaces ...

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Foundation

The foundation is also referred to as the pump foundation and serves as the base for the baseplate to ...

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Free-flow impeller

The free-flow impeller is a radial impeller which has a large free passage for solids contained in ...

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Free passage

The term free passage refers to a free, unrestricted impeller passage and defines the max.

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Frequency

Frequency is the characteristic magnitude of recurring events during a periodic phenomenon such as a ...

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Frequency inverter

A frequency inverter is an electronic device that receives three-phase or alternating current and ...

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Frequency of starts

The frequency of starts for pumps refers to the number of times the electric motors that power them ...

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FROUDE number

The FROUDE number is a dimensionless physical characteristic coefficient used in flow analyses which ...

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Functional earthing

Functional earthing is a type of earthing, that forms a functional part of an electrical installation ...

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Fundamental equation

The fundamental equation describes the energy conversion in turbomachinery (also see Fluid mechanics).

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Fuse

The fuse is a protective device that interrupts a circuit when a specific electric current is applied ...

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