1. Search
  2. A-Z

H/Q curve

The H/Q curve is a centrifugal pump's characteristic curve which plots the head (H) against the flow ...

More

Hand pump

The hand pump is a positive displacement pump which, because of its small size, can be held in the ...

More

HART

HART stands for "Highway Addressable Remote Transducer" and is a standardised communication protocol ...

More

Head

This term is an important energy concept (EN 12723) in centrifugal pump engineering. A distinction ...

More

Head coefficient

The head coefficient (ψ) is a characteristic coefficient derived from the corresponding physical ...

More

Head loss

Head losses are a result of wall friction in all types of pipelines and of local resistance to flow, ...

More

Heat

Heat is another term for heat energy.

More

Heat barrier

The heat barrier helps prevent the heat transferring from the hot pump to the cold motor so that the ...

More

Heat energy

Heat energy in the technical sense means the thermal energy that a body possesses. The SI unit is the ...

More

Heat pump

The heat pump is not a pump in the strict sense of the word, but a system with the aid of which low ...

More

Heat transfer pump

Heat transfer pump: Pump-end plain bearing, drive-end rolling element bearing and double mechanical seal

A heat transfer pump is a pump used for circulating heat transfer fluids, e.g. for maintaining the ...

More

High-efficiency motor

A high-efficiency motor operates at a high level of efficiency and is compliant with efficiency class ...

More

High-pressure pump

The high-pressure pump is a centrifugal pump with a head of between 200 and 1200 m, which is used, ...

More

High specific speed

High specific speed is a parameter used to characterise turbomachinery speed.

More

High-speed centrifugal pump

High-speed centrifugal pumps are geared pumps used, for example, to remove sandy soil from an ...

More

HMI

HMI stands for "Human-Machine Interface" and is also referred to as the "Man-Machine Interface" (MMI).

More

Horizontal pump

Horizontal pumps are centrifugal pumps with horizontal shaft axis.

More

Hot water pump

The hot water pump is a centrifugal pump for handling water at temperatures above 100 ºC. They are ...

More

Hub diffuser

On tubular casing pumps, particularly those of an axial flow type, the flow velocity downstream of ...

More

Hub-to-tip ratio

The hub-to-tip ratio (ν) represents a characteristic geometric dimension of centrifugal pumps' ...

More

Hybrid cooling

Hybrid cooling is a form of cooling which combines the benefits of dry and wet cooling at markedly ...

More

Hydraulic efficiency

Hydraulic efficiency (ηh) is also referred to as "vane efficiency" in the specialist centrifugal pump ...

More

Hydraulic ram

Hydraulic rams, or hydrams, are relatively simple machines, with the help of which water can be ...

More

Hydraulic torque converter

Hydraulic torque converters resemble fluid couplings and consist of an impeller (on the input shaft), ...

More

Hydraulic unbalance

Hydraulic unbalance during pump operation has the same effects as mechanical unbalance.

More

Hydrodynamic coupling

A hydrodynamic coupling is a type of fluid coupling used to transmit torque.

More

Hydrodynamic transmission

A hydrodynamic transmission is a hydraulic torque converter that sets a fluid in motion internally in ...

More

Hydrophore system

A hydrophore system is also referred to as a domestic water supply system.

More