hydraulic submersible dredge pump

The difference between centrifugal pump and self-priming pump

The self-priming pump is a kind of centrifugal pump, called a self-priming centrifugal pump. The self-priming pump has a higher body height and is much larger than the centrifugal pump. It has a certain water storage capacity and does not need to install a bottom valve in the suction pipe. It has the function of self-priming for a lifetime. The liquid level of the centrifugal pump must be higher than the pump to be able to enter the pump body to start, so the self-priming pump is better than the centrifugal pump in the working conditions that require the self-priming function.

1. Different composition

The centrifugal pump is composed of 6 parts including an impeller, pump body, sealing ring, and stuffing box. The self-priming pump is divided into a suction chamber, an oil storage chamber, a vortex chamber, a liquid return hole, and a gas-liquid separation chamber.

The centrifugal pump is composed of 6 parts including an impeller, pump body, sealing ring, and stuffing box. The self-priming pump is divided into a suction chamber, oil storage chamber, vortex chamber, liquid return hole, and gas-liquid separation chamber.

2. Different startup methods

To open the centrifugal pump, you need to fill the water inlet pipe and the pump body with water or use auxiliary equipment to pump air into the water inlet pipe. When the self-priming pump is turned on, an appropriate amount of circulating water should be added to the pump body.

3. Different devices

The place where the bottom valve or the outlet must be installed under the inlet pipe of the centrifugal pump must be equipped with air extraction equipment. The self-priming pump needs to be equipped with a filter screen under the water inlet pipe, without the need for a bottom valve.

4. Different uses

Centrifugal pumps are mainly used for liquid transportation, cooling, industrial cleaning, aquaculture, fertilization, computing and testing, and industrial equipment, and can also be used in the transportation of electric power, metallurgy, coal, and building materials industries and the manufacture of slurry with particles.

Self-priming pumps can turn water into fine raindrops for spraying and are widely used in farmland, nurseries, orchards, and other places. Clearwater, seawater, acid-base chemical solutions, or paste-like slurries can be used and can be mixed with Use with most types of filter presses.

5. Different advantages

The centrifugal pump is a compact structure, with a large flow rate and field control range. It can be used in mildly corrosive liquids with a balanced flow, stable operation, little vibration, and low installation and maintenance costs.

The structure of the self-priming pump is also very compact, the operation is very convenient, the operation is stable, the maintenance is convenient, and the use efficiency is high, and the use time is long.