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Anyone seeking to purchase a new Stainless Steel Submersible Sewage Pump for a water logistics system needs to answer any questions before receiving any advice from the manufacturer. The following is a brief overview of expectations:
1.What should be pumped?
This is a basic question. The pump cannot pump all fluid. Mainly divided into four categories: clean water, greywater, sewage, and brine pumps. The latter is usually also used for pumping other chemically reactive media and is therefore made of durable materials. Stainless steel is usually used when pumping drinking water. Tip: Install the anode block on the pump to prevent corrosion.
2.What pumping volume?
Usually, the amount of water that needs to be pumped (liters/minute or cubic meters/hour) is the factor that determines the required pump output. Each pump covers a range and has an optimal value, which is why there are so many types. Don't forget to consider the diameter of any pipes that the pumped volume needs to pass through. Tip: Choose slower pumps because they are not prone to wear.
3.How high can the medium be pumped?
This question is related to the previous question, because the larger the pumping volume, the smaller the pumping volume. The main factor here is the absolute height difference between the upper and lower water levels (earth water head). The high-pressure pump can pump liquids up to 200 m long. Conversely, if the horizontal distance is large, the same applies. Tip: If an adapter is used, sometimes two (identical) pumps can be operated in series – the second pump acts as a booster, almost doubling the output.
4.Has the water volume changed?
If pumps are not often needed, the solution is pumped with permanently connected level sensors, as they turn on and off automatically. Electrode sensors are much more reliable than mechanical contact switches. Alternatively, an external control unit can be used. Tip: The frequency converter can ensure a smooth start, prevent pressure fluctuations and balance the multi-pump system.
5.Is there any solid matter in the pumped medium?
This issue is particularly important when considering gray water pumps and sewage pumps, each of which can only handle a certain amount of solid matter. If the substance is granular, such as greywater, the size of the filter perforations in the pump will indicate which particles can still pass; some of them can be as large as 30 mm. Sewage pumps get clogged faster than other pumps, which is why they need impellers with cutting blades that can even chop interwoven fibers. Tip: No matter where you pump viscous media, use a mixer in front of the suction port to ensure that these media flow freely.
6.What is the temperature of the pumped medium?
Most media are pumped at a temperature of about 40 degrees, although higher values can be expected in the process. In this case, a customized solution is required. The important design features here are the heat dissipation process and sealing. A pump with an outlet or spiral casing on the top will dissipate more heat. Tip: Never run the pump beyond the specified thermal operating limits.
7.Installation and operation?
Certain pumps can only be installed in the dry environment of the pumping station. In contrast, submersible pumps operate while immersed in the medium. The maximum immersion depth is listed in the datasheet. Some can even be installed in a dry environment. Just ask if they are suitable for permanent operation. Tip: Ensure that the pump has a centrifugal oil lubrication system because they can work normally in a horizontal or vertical installation position.