1. According to the characteristics of the sewage, determine the type of pump to choose, whether it is necessary to use a stirring sewage pump or a cutting function, whether to choose a vortex impeller or a runner impeller, single runner or double runner (under the same conditions, single runner The anti-clogging performance is better than that of the dual-flow channel).
2. The submersible sewage pump brand must be manufactured and produced in strict accordance with ISO9001 or current domestic standards, and qualified by the comprehensive performance test of the institution.
3. The submersible sewage pump should have a leakage protection device and an overheating or overload protection device, a sealed leakage monitoring device and a reliable grounding device.
4. According to the user's sewage volume, water quality and the location of the sewage pond (collection well), reasonably determine the flow and lift required by the submersible sewage pump, and determine the pump specifications.
5. The submersible non-clogging sewage pump kit includes a control cabinet, a liquid level switch, an automatic coupling device, etc., when the user needs it, the supplier should provide it uniformly; the vulnerable parts should be equipped with it.
6. If the submersible sewage pump is used to transport corrosive wastewater, the pump body should be made of corrosion-resistant materials such as stainless steel.
7. When selecting the submersible sewage pump, you should understand the average trouble-free working time, mechanical seal life, bearing rated life, motor design life, motor insulation level, and the motor should be able to withstand the number of starts and stops per hour under normal use conditions.
8. When there are multiple brand products to choose from, it should be based on the material of the main components of the submersible sewage pump, processing accuracy, equipment appearance, flow-through components* functions (large passage, anti-winding, anti-clogging, etc.) and additional functions (long fiber Cutting and tearing, automatic mixing to prevent dirt from settling and compacting, etc.), the supplier's commitment to trouble-free service life, after-sales service, quotation and other aspects are comprehensively compared, and the best is used.
9. The outdoor sewage tank of the building can be installed with a non-closed manhole cover without a vent pipe. An airtight manhole cover and a vent pipe should be installed in the indoor sewage tank. The airtight manhole covers are made of gray cast iron, cast aluminum and ductile iron.
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