Emergency Pumping Self-priming Pump

This pump body does not have a liquid storage chamber. Instead, it is connected to the working chamber of the pump through the upper return water hole and the lower circulation hole, forming an axial return external mixing system. When the pump stops running, a certain volume of liquid has been stored in the pump chamber. When the pump is started, under the action of the impeller, the stored liquid and air are thrown upward together. The liquid flows back to the working chamber through the gas-liquid separation chamber, while the gas is discharged outside the pump, thus creating a certain vacuum inside the pump and enabling the self-suction function.

1. Irrigation and Drainage in Farmland
In the irrigation system, the water source may contain a lot of gases or need to be pumped from open water bodies (such as ponds, ditches). Self-priming pumps do not require a bottom valve and can achieve "one-time drainage, lifelong self-priming" after the first liquid filling, greatly simplifying the installation and operation procedures. Their stable and reliable operating characteristics are also suitable for mobile irrigation operations in hilly and mountainous terrain areas.
2. Sewage Treatment and Environmental Protection Engineering
When treating wastewater or waste liquid containing suspended solids, fibers, or prone to generating gases, self-priming pumps can effectively handle the gas-liquid mixture, prevent air lock, and ensure continuous operation. Their compact structure and easy maintenance features also facilitate deployment and maintenance in sewage treatment stations, environmental protection equipment, and emergency drainage scenarios.
3. Construction Sites and Municipal Drainage
Construction sites often need to drain water from foundation pits, conduct pipeline pressure testing drainage, or handle water accumulation after rain. The working medium often contains sand and air. Self-priming pumps can quickly start, have built-in liquid storage capacity, and are suitable for frequent start-stop and unstable medium conditions. They do not require refilling each time, significantly improving operational efficiency.
4. Firefighting and Emergency Drainage Systems
In firefighting pressure stabilization and emergency drainage scenarios, equipment needs to be on standby for a long time and be able to start reliably at any time. Self-priming pumps have the ability of "lifelong self-priming", which can avoid problems such as inability to pump water due to bottom valve failure or leakage. The stable structure and simple maintenance features also meet the requirements of high reliability for fire equipment.

The pump can work properly and continuously under following operational conditions:

1. Medium is not corrosive, Sand contents should be max.0.10% by volume and granular size should be max.0.20mm.

2. Medium temperature shouldn't be over 40"C and PH should be6.5-8.5.

3. Power frequency should be 50Hz,single phase voltage 220v,three- phase voltage 380V, and voltage fluctuation should
be 0.9-1.1 times than the rated.

4. Filling full water into pumps before using in order to eject air, otherwise the pump is hard to work.

1. Suitable for cooling equipment in urban environmental protection, construction, fire protection, chemical industry,
pharmaceutical industry, dyes, printing and dyeing, brewing, electricity, electroplating, papermaking, mining and washing.

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