A stainless steel self-priming pump is not primed with water. This is a common problem. Many people assume that since it's self-priming, it should automatically draw water without priming. This is a mistake. Self-priming pumps pump liquids and cannot create a vacuum. Therefore, priming is essential when the pump is first used without any liquid stored in the pump body. Conversely, if the pump is turned on without priming during initial use, it will not pump liquid. Long-term operation can also cause the pump to dry-run due to idling, burning components such as the seal and impeller.

Incorrect rotation of a stainless steel self-priming pump is also quite common, but it's very easy to identify and fix. Install a pressure gauge at the pipe outlet. If the gauge shows no pressure after the pump is turned on, it's likely the pump is in the wrong rotation direction and can be adjusted. If the pump's speed is too low, the pump will not pump liquid if the liquid concentration reaches a certain level. Adjust the pump speed. Once the speed reaches a certain level, the self-priming pump will discharge liquid normally. A self-priming pump's suction lift is too high, a common problem and one many people fail to consider when selecting a pump. Typical self-priming pumps only have a suction lift of 3-6 meters, but this varies depending on the pump type, so it's important to carefully consider the pump's suction lift when purchasing. Furthermore, the pump's suction lift must be accurately calculated. Another reason a self-priming pump may not deliver liquid is air leakage at the inlet or outlet, preventing the pump from properly priming water. These issues are common and can be corrected by the user. If none of these issues are present and the pump still fails to deliver liquid, contact the pump manufacturer.

The inlet and outlet of a stainless steel self-priming pump can be connected using hoses or flanged pipes. When using hoses, the inlet hose connector is equipped with a check valve to prevent backflow of liquid during shutdown. The pump body houses a closed single-stage impeller within the vortex flow passage. The pump cover has a seal chamber, and the bearings are lubricated with grease. A V-belt pulley or coupling is located at the rear end of the pump shaft, and the pump is driven by an electric motor or internal combustion engine.