Overview

WZ Series is suitable for conveying at a temperature of -20℃ ~+80 ℃, viscosity of not more than 5oE without solid particles, volatile, easy gasification of seawater and freshwater. Can be used for ship, petroleum, chemical industry, printing and dyeing industry, hotels, villas and high-rise living water for boiler. This type pump has the advantages of small volume, light weight, strong self-absorption, can be equipped with motor, gasoline engine, diesel engine as power.

1W(Z) Series marine self-priming vortex pumps are applicable for pumping potable water, washings and sanitary fresh water and sea water, as well as life pump and cooling pump（T＜85℃).

W type is a single level cantilevered vortex pump. Suitable for conveying temperature from -20℃~+80℃, viscosity is not greater than 5°E, without solid particles in a liquid. Flow components of the material is divided into HT200, Cr18Ni12Mo2Ti three and aluminum cast iron. (Respectively H, J and M code of materials express). Seal forms a soft packing seal and mechanical seal. W type vortex pump by the pump to the motor rotation direction: the direction for counterclockwise rotation.

CWX Series marine self-priming vortex pump divided into the bracket and no bracket two. The pump is the two level structures of pump cover and the outer diaphragm: a centrifugal wheel -- first stage; the outer clapboard clapboard is arranged between the work and swirl round -- second. The pumps are self-priming function, start before the first pump is filled with water, because the outlet nozzle and the exclusion of the take-over position were higher than that of the pump body, so after stopping the pump, ensure the pump body of water, so it starts again do not need water injection can self sucking work. The pump with mechanical seal, the sealing performance is good. The pump has stable work, long life advantages. Applicable to ships, pumping water device washing and hygiene of fresh and salt water (T＜85℃).

Advantages and Disadvantages of Vortex Pumps

Advantages of Vortex Pumps

1. Vortex pumps are widely used on ships for sea and canal transportation. The small size and light weight of the vortex pump are extremely advantageous.

2. The vortex pump has the self-priming ability, and can also realize the self-priming function with the help of a simple device.

3. The rate of change of the flow head curve of the vortex pump is relatively large, so the vortex pump is not sensitive to pressure fluctuations in the system.

4. Some vortex pumps can realize vapor-liquid mixed transportation. This is of great significance for pumping volatile liquids containing gas and high-temperature liquids with high vaporization pressure.

5. The temperature of the conveying medium of the vortex pump should be controlled within a certain range and cannot exceed 60 °C.

Disadvantages of Vortex Pumps

1. Due to the small size and simple structure of the vortex pump, this also causes the efficiency of the vortex pump to be low. The efficiency of the vortex pump is generally between 20-40%.

2. The cavitation performance of the vortex pump is poor.

3. The vortex pump cannot be used to pump viscous medium. During the working process of the vortex pump, the head and efficiency of the vortex pump will decrease sharply with the increase of the viscosity of the liquid.

Maintenance and Disassembly

The characteristics of the pump are simple and reliable structure and durability. Under normal conditions, the pump generally does not need to be disassembled and maintained frequently. When a fault is found, it can be eliminated at any time.

1. Maintenance and maintenance during operation:

(1) The inlet pipe must be filled with liquid, and the pump is prohibited from running for a long time in the state of cavitation.

(2) Regularly check the current value of the motor during the operation of the pump, which must not exceed the rated current of the motor.

(3) After the pump runs for a long time, when the noise and vibration of the unit increase due to mechanical wear, it should be stopped for inspection, and the vulnerable parts and bearings can be replaced if necessary. The unit overhaul period is generally one year.

2. Mechanical seal maintenance and maintenance:

(1) The lubrication of the mechanical seal should be clean and free of solid particles.

(2) It is strictly forbidden for the mechanical seal to work under dry grinding conditions.

(3) Rotate the pump (motor) several times before starting, so as not to cause the graphite ring to break and damage due to sudden start.

3. Pump disassembly sequence:

A. Remove the motor or disengage the coupling.

B. Remove the bearing body assembly, check the radial clearance between the impeller and the front port ring, and check whether the impeller nut is loose.

C. Remove the impeller nut, pull out the impeller, and check the radial clearance between the impeller and the rear seal ring.

D. Loosen the set screw of the mechanical seal, pull out the moving ring part of the mechanical seal, check the fit of the end faces of the dynamic and static rings, and check the sealing condition of the "o"-shaped sealing ring (or cushion).

E. Unscrew the set nut of the coupling and pull out the coupling.

F. Remove the bearing cover and remove the pump shaft and bearing.

G. Assembly can be done in reverse order during installation.

Troubleshooting and troubleshooting