Pump is a wide used machinery on ship, it prime by motor drive, the mechanical energy into fluid pressure energy, potential energy and kinetic energy. In ship pump to transport liquid is water and oil.

In order to pump water, fresh water, fuel, oil and other liquids, need for a certain amount and different types of pumps. Generally in the engine room must be set bilge pump, fuel pump and oil delivery pump, boiler feed pump, cooling pump, ballast pump, sanitary pumps and other major pumps

In the marine machinery and equipment, marine pump with large number, variety ,it is an important ship matching product. It is widely used in ship power system, fire protection system, cooling system, pressure loading system, stripping system, life security services and other special system, but also be equipped in certain auxiliary devices. Marine pumps also widely used in marine engineering equipment, docks, port terminals, etc.

Marine pump has a very wide range of applications in modern ships, according to the different purposes, can be divided into:

1.Marine power plant pump

Fuel pump, lubricating oil pump, sea water pump, fresh water pump, steering gear or other hydraulic deck machinery hydraulic pump, boiler device pump, cooling water pump, sea water desalination device water pump and condensate pump.

2.Marine general pump

Bilge pump, ballast pump, fire pump, daily fresh water pump, daily sea water pump, hot water circulation pump , general pump with function of fire protection, bilge ,ballast.

3.Special ship pump

Some special purpose ship, also has special operation requirements pump, such as oil tanker cargo oil pump, dredger mud pump, salvage ship salvage pump, jet propulsion ship water boost pump, no net fishing ship fishing pump.

Marine gear pump

Gear pump is a rotary pump which depend working volume formed by pump body and meshing gear , its change and movement conveying fluid or pressure boost. KCB gear pump is a gear pump with safety valve, YCB gear pump is representative of arc gear pump. In oil transport system can use as transmission pump, booster pump, in fuel system use as fuel oil conveying pump, pressure pump, jet pump;

Medium

Gear pump has the advantage of transporting high viscosity medium, lubricating medium. Normally used for conveying non corrosive, non solid particles and has lubricating capacity oil, medium temperature is generally not more than 70 ℃. General flow range of 0.045 ~ 30ms/h, pressure range of 0.7 - 20MPa, the working speed of 1200 - 4000r/min.

Feature:

Constant flow, pressure is not affected by the flow ,compact structure, good manufacturability, strong suction, is not sensitive to oil pollution, wide speed range, can resist impact load, convenient maintenance, reliable work

Marine screw pump

Screw pump is volume rotary pump, it rely on the sealing chamber formed by the screw and bushing, the volume change to suck and discharge liquid. Flow is stable, has the self-priming ability, when transport medium not form the eddy current, the viscosity of medium is not sensitive, can transport high viscosity medium

Marine centrifugal pump

Centrifugal pump rely on the centrifugal force of impeller rotation to transport liquid. The pump must be filled with water in the pump shell and water suction pipe before starting.

The flow and head range is wide, which suitable for mildly corrosive liquid, uniform flow, smooth operation, small vibration.

Horizontal centrifugal pump with large flow and low head, it is required install base, the inlet diameter greater than outlet, efficiency is higher than vertical pump, the pipeline impact is small. Large power pump is generally recommended horizontal type.

Vertical centrifugal pump installed in the underground tank condition can't intrusion. Its inlet and outlet with same diameter, and is located in the same center line, can be installed in pipeline as valve, compact structure, small area, low construction investment. Vertical multi-stage centrifugal pump for small flow high head condition

Marine self-priming pump

Self priming pump working principle: before starting ,the pump is filled with water. After the start that high-speed rotation of impeller lead the flow in impeller channel to vortex shell, then the entrance form a vacuum, so that water backstop door open, suction tube air into the pump and through the impeller channel to reach outer edge. After the first time use not required to fill the water in pump again. The actual use self suction height best control within 8 meters.

Suitable for conveying bilge ballast water ,seawater cooling, firefighting, sanitation and other aspects ship freshwater or seawater, temperature no more than 80 degrees Celsius. Equipped with explosion-proof motor can also use to conveying gasoline, kerosene, diesel oil, air coal, sewage, etc.

The flow and head range is wide, which suitable for mildly corrosive liquid, uniform flow, smooth operation, small vibration. Strong self-priming capacity, pipe does not need to install the bottom valve. Pipeline system is simplified, and the working conditions are improved.

Self absorbing function can be realized under the condition of no self suction device:

1.Afterward opening door type, so that in the case of no moving pipeline can do pump inspection.

2.water conservancy has taken the non overload design, so that the pump will not operate under any conditions of overload problem.

3.advanced water design, so that the pump has excellent cavitation performance, so that the pump can be effectively avoid cavitation,in the case of deviation from design conditions and the relatively poor inlet conditions