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GE Type Horizontal End Suction Centrifugal Pump .pdf



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Croos Pump (Shanghai) Co., Ltd
http://www.croospump.com/

GE Type Horizontal End Suction Centrifugal Pump
Description of End Suction Centrifugal Pump:
GE series horizontal end suction centrifugal pumps are over hung pumps and designed
according to EN733/DIN24255 standard, mainly be applied to clean water or liquid with fewer
solids, with the cooling device, also can be used for hot water, ethyl alcohol and other industrial
process water and sea water. There are three different impeller type can be chosen according to
different request: closed, semi-open and open impellers.

Horizontal Centrifugal End Suction Pump Design Feature:

Design strictly according to DIN24255 and ISO2858 design, every part can be
interchangeability with other same standard brands.

Tel: +86-21-64092786

Email: export@croospump.com

Croos Pump (Shanghai) Co., Ltd
http://www.croospump.com/
Back pull-out design and contact the pump and motor through coupling for easy
installing and dismantling.
Five size type of shaft of bearing house for the whole series to ensure the less stock and
less time of lead time
WAX casting for casing and impeller to make sure high efficiency and wonderful surface
Flange standard can be made to DIN, ANSI, ISO and another special standard

GEC Type Monoblock End Suction Centrifugal Pump

General Description of Monoblock Centrifugal Pump:
GEC series monoblock end suction centrifugal pumps are close coupled overhung structure, the
pump and motor share one same shaft. GEC series end suction pumps are designed according to
EN733/DIN24255 standard, mainly be applied to clean water or liquid with fewer solids, with the
cooling device, also can be used for hot water, ethyl alcohol and other industrial process water
and sea water.

Main Features of Centrifugal Monoblock Pump:

Design strictly according to DIN24255 and ISO2858 design, every part can be
interchangeability with other same standard brands.

Tel: +86-21-64092786

Email: export@croospump.com

Croos Pump (Shanghai) Co., Ltd
http://www.croospump.com/
Close coupled design save the project budget and reduce the floor space.
Overhung type frame
WAX casting for casing and impeller to make sure high efficiency and wonderful surface
Flange standard can be made to DIN, ANSI, ISO and another special standard

Centrifugal End Suction Pump Application:
Civilian, Chemical industry, Metallurgy, Light industry, Irrigation
Such as: Buildings, water works, irrigation, Circulation for the air-conditioning system; oil refining,
Steel industry, silver, copper, iron, sternum, aluminum, zinc ore, etc, non-ferrous metal smelting.
Foodstuff, medicine, drink, clean water, liquor, desalination of sea water and water treatment.
The Causes and Prevention of Cavitation of Centrifugal Pump
The cavitation of centrifugal pump is one of the most common centrifugal pump faults, there are
many reasons for this phenomenon, such as the improper use of operators, the quality of
centrifugal pump products and so on. The products have to pass the inspection procedure, and
the factors of human operation are more likely. In the state of work, the operating environment
of centrifugal pump and the influence of operating factors account for most of the ratio of
centrifugal pump cavitation. First, let we konw how the cavitation of centrifugal pump occurs.
The causes and process of cavitation of centrifugal pump:
When the centrifugal pump is working, the liquid pressure of the centrifugal pump will decrease
as the fluid in the pump decreases from the inlet to the impeller inlet. When the liquid pressure
near the inlet of the blade reaches its minimum, the impeller begins to work on the liquid, and the
liquid pressure begins to rise. When the minimum pressure near the inlet of the blade is less than
the saturated vapor pressure of the liquid transport temperature, the vaporization of the liquid
will occur. Gases that dissolve in liquids also escape, and form bubbles. When the bubble is
flowing with the liquid to the lower pressure of the blade, the outside liquid pressure is higher
than the vaporization pressure inside the bubble, then the bubble is recongealed to form the
cavity. Instantly, the fluid around the cavity rushes at a high speed, causing the liquid to collide
with each other, and it will cause the local pressure to increase abruptly. This not only impedes
the normal flow of liquid from the centrifugal pump. And when these bubbles burst near the wall
of the impeller, the liquid will continuously impact the inner surface of the centrifugal
pump. Long term impact will cause structural damage and peeling of the inner wall of the
centrifugal pump. If the bubbles are mixed with some chemical gas like oxygen, the gas
condensate will use bubbles when gives off heat knot (local temperature can reach 200 ~ 200 ℃),
it also forms thermocouple, which produces electrolysis, forming electrochemical corrosion,
which speeds up the destruction of metal. Like this liquid vaporization, condensation, impact,

Tel: +86-21-64092786

Email: export@croospump.com

Croos Pump (Shanghai) Co., Ltd
http://www.croospump.com/
formation of high pressure, high temperature, high frequency impact load, and the phenomenon
of mechanical stripping and electrochemical corrosion of metal materials is called centrifugal
pump cavitation. When the cavitation occurs, the mechanical denudation and chemical corrosion
can cause the material to be destroyed, and the noise and vibration will occur. When the
cavitation develops seriously, the presence of a large number of bubbles can clog up the cross
section of the flow channel and reduce the energy obtained from the impeller, resulting in the
interruption of the fluid in the pump and not working properly.
During the cavitation of centrifugal pump, there are four main factors that affect the
centrifugal pump:
1. The structure parameters of centrifugal pump: shape of impeller suction inlet, width of inlet
edge of blade and position of inlet edge of blade and shape of front cover plate and so on. When
cavitation of centrifugal pump occurs, and the influence proportion of its own physical structure
is also larger.
2. The work status of centrifugal pump: pump flow, lift, speed.
3. The installation of centrifugal pump: it is necessary to calculate the hydraulic loss and
installation height of pump suction pipe.
4. The working environment of centrifugal pump: the atmospheric pressure in the work place
where the centrifugal pump is located and the temperature of conveying the liquid. Different
types of centrifugal pumps can be used for different types of centrifugal pumps. For example, the
transmission of acidic liquid can be used to choose corrosion - resisting centrifugal pump, the
chemical fertilizer of smelting dye can be used in glass steel centrifugal pump.
Cavitation of centrifugal pump is one of the common mechanical faults. All mechanical
equipment, in the long working condition, will have the occurrence of mechanical equipment
damage, when we encounter the cavitation phenomenon of centrifugal pump, we should first
analyze whether it is the operation problem or the influence of the working environment of the
centrifugal pump. If it's not, it's a product technical problem. The technological innovation of
industrial products is faster, and there will be more high-tech products in the future.

Tel: +86-21-64092786

Email: export@croospump.com


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