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Tangential component

All velocity components parallel to the circumferential speed are defined as the tangential ...

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Tank farm pump

Tank farm pumps are submersible pumps which are used in tank farms for transporting liquid raw, ...

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Tank flow

A certain level of flow volume/velocity is required in the activated sludge tanks of waste water ...

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Tapping stage

The tapping stage of a ring-section pump is the stage at which a portion of the fluid handled is ...

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Tee

The tee is a fitting which allows branching of the volume flow at an angle of 90°.

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Telemetry

Telemetry describes the transmission of measured values recorded by a measuring element such as a ...

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Teleservice

Teleservice describes the exchange of data and information between technical installations that are ...

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Temperature

Temperature is a physical and thermodynamic property which describes the thermal energy of a material.

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Temperature measurement

The temperature in centrifugal pumps is usually quantified using a contact thermometer, whose ...

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Temperature rise in electric motors

The power loss in an electric machine (see Drive) leads to the build-up of heat in active parts such ...

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Temperature sensor

A temperature sensor is an electronic component. The process of converting temperature into an ...

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Terminal

Terminals in electrical engineering applications allow wires, cores, and leads to be detachably ...

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Terminal gland

Terminal gland: Example for glandless pumps with wet winding (wet rotor motor)

The terminal gland facilitates the supply of current through the motor housing to the winding.

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Terminal identification

A terminal identification is a marking that facilitates connecting leads or troubleshooting via a ...

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Test facility

The test facility, which is also referred to as the pump test facility, is used for developing and ...

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Thermal circuit breaker

The thermal circuit breaker is a bimetal switch that protects the motor windings from overheating.

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Thermal output

Output of heat or cold (thermal power) is understood to be the quotient of heat energy and time span.

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Thermal overload protection

Protection against thermal overload a result of excessively high electric current is enabled by ...

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Thermistor

The thermistor is a heat-sensitive electrical resistor that reliably alters its resistance value when ...

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Thermocouple

A thermocouple is a measuring instrument (also see Sensor) whose measuring principle is based on the ...

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Thermoelectric principle

The thermoelectric principle is a measuring principle based on the thermoelectric effect and is used ...

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Thermoelectric series

Heating a soldered or welded connection joining two metals (e. g. to measure temperature) with cold, ...

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Three-phase current

Three-phase current can also be called three-phase alternating current or three-phase electric power ...

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Three-phase electric power

Three-phase electric power is a colloquial expression for the term three-phase current.

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Three-phase motor

A three-phase motor is an electric motor that typically receives its power from a three-phase system ...

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Throttling coefficient

The throttling coefficient is also referred to as the loss coefficient.

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Throw

In fire-fighting it is common practice to test a fire-fighting pump's function by checking the water ...

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Thyristor

The thyristor is a semiconductor switching element that comprises at least four semiconductor layers, ...

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Tightening torque

The tightening torque refers to the torque that is required to achieve adequate preloading of a ...

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Tightness

Tightness is a property of material structures and is a relative concept that always refers to ...

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Time

Time (t) is a physical dimension. It extends from the past, through the present and into the future.

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Torque

Torque is a physical quantity and describes a force couple that acts on a body (e.g. impeller of a ...

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Torque curve

The torque curve shows two ranges: a starting torque and an operating torque range. Electric motors ...

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Torque flow pump

The torque flow pump is also referred to as vortex flow pump. Its hydraulic power (see pump power ...

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Torque measurement

Different torque-measuring devices can be used to measure torque and include the torque metering ...

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Torque meter

Torque meters are used in measuring power (also see Power measurement).

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Torsion dynamometer

Torsion dynamometers are machine components that are usually installed between the motor and driven ...

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Total head

The total head HBN, calculated from a datum level BN, is the mechanical energy of the fluid handled, ...

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Total pressure

The total pressure ptot is the sum of all pressures present in a reference system. According to ...

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Total tolerance

The total tolerance is the combined manufacturing tolerance and measurement uncertainty for ...

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TPM

TPM (Total Pump Management): modular service concept

TPM is the abbreviation for Total Pump Management, which is a modular service concept for pumps, ...

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Transient

If a parameter is not able to maintain a constant value over time, but changes relative to time, it ...

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Transient flow

The flow of a fluid is transient or unsteady if its flow parameters (i.e. velocity and pressure) are ...

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Transmitter

The transmitter is a transducer or transformer and is used in the piston transmitter.

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Transverse thruster

A transverse thruster is used as a manoeuvring aid on board ship at slow speeds, for example to ...

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Travelling screen

A travelling screen is a continuously moving, belt-like fine-mesh screen that is mainly used to clean ...

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Tribology

Tribology is the study of friction. Bodies interact with the environment and with other bodies via ...

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Tubular casing

On tubular casings the fluid flow handled by the pump exits the impeller in an axial or semi-axial ...

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Tubular casing pump

A tubular casing pump is a centrifugal pump in which the fluid handled, having passed the impeller ...

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Tuft

Tufts are used to make flows visually apparent. This is achieved by attaching a woollen thread to one ...

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Turbine-driven pump

A turbine-driven pump is a centrifugal pump driven by a turbine (see Type of pump).

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Turbine mode

A standardised centrifugal pump can be run in reverse and used as a turbine without having to make ...

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Turbomachinery

Turbomachinery includes all types of machines through which a fluid or a solids-laden fluid flows and ...

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Turbulent flow

In contrast to laminar flow, turbulent flow is characterised by an additional, macroscopic (visible) ...

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Twin pump

A twin pump is a circulating pump consisting of two separate centrifugal pumps in a common pump ...

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Two-channel impeller

A two-channel impeller is a waste water impeller with a large free passage (see Channel impeller).

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Two-phase flow

Two-phase flow is a flow in which two different aggregate states of a substance or of two different ...

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Type of protection

The types of protection for electrical operating equipment (e. g. electric motor) are specified in ...

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Type of pump

The pump's designation does not always provide information on the pump type, as very different ...

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