No need of bottom valve, no need of automatic feeding installation;
Avoid dry friction among axis, shaft seal, impeller and sealing ring, prolong life of fittings, low maintenance cost;
Not only matched with pump, but also an organic whole;
Installation above liquid level, reduce construction costs, convenient for maintenance;
No need of bottom valve, improve insulation condition of inlet;
Having function of high liquid level starting, low liquid level stop, intelligent shutdown protection;
Realize remote control, labor saving, increase degree of automation;
Horizontal type, vertical type, stationary type and movable type installation according to environment condition;
Suitable for application in winter, especially in high and cold area;
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