1) It is necessary to select a submersible sewage pump brand that is manufactured in strict accordance with the international ISO9906 or relevant domestic standards and has passed the comprehensive performance test of the authority.
2) According to the user's needs, increase the amount of sewage (waste) water, water quality and sewage pool (collection well) setting position, reasonably determine the flow and head required for the submersible sewage pump, and determine the pump specifications.
3) According to the characteristics of sewage and wastewater, it is decided whether to use the type of pump, whether it is necessary to use cutting and grinding, whether it is a swirling impeller or a runner impeller, whether it is a single flow channel or a double flow channel (single flow channel than double flow channel under the same conditions) The anti-blocking performance is better).
4) When selecting, 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 of the submersible sewage pump under normal use conditions.
5) The submersible sewage pump should have leakage protection device and overheating or overload protection device, sealed leakage monitoring device and reliable grounding device.
6) The outdoor sump of the building can be installed with a non-closed manhole cover and no vent pipe. The indoor sewage pool (collection well) should be equipped with a closed manhole cover and a vent pipe. The closed manhole cover is made of cast aluminum, grey cast iron and ductile iron.
7) If the submersible sewage pump is used to pump corrosive wastewater, the pump body should be made of corrosion-resistant material such as stainless steel.
8), the basement submersible sewage pump should be equipped with dual power supply.
9) When there are multiple brand products to choose from, it is necessary to target the main components of the submersible sewage pump, processing precision, equipment appearance, necessary functions of the overcurrent components (large passage, anti-winding, anti-blocking, etc.) and additional functions ( Long fiber cutting and tearing, automatic mixing to prevent dirt and sedimentation, etc.), the supplier promises a comprehensive comparison of the years of failure, after-sales service, quotation, etc.
10), submersible sewage pump kit (control cabinet, liquid level switch, automatic coupling device, etc.) should be supplied by the supplier; spare parts should be provided with spare parts; optional parts (pipe valves, pipe fittings, etc.) Purchasing with the main installation engineering plumbing equipment, you can also ask the pump supplier to purchase.