
Self-priming pump relies on the high-speed rotation of impeller to generate a low-pressure area in the self-priming pump to absorb water, so the self-priming pump must ensure that its water inlet pipe does not leak, that is, the outside air cannot enter the water inlet pipe. Otherwise, it will not only affect the efficiency of the pump, but also produce serious vibration and noise when the pump operates
Send InquiryChat NowA self-priming pump uses an air and water mixture in order to reach its fully primed state. While called a self-priming pump, it is actually a centrifugal jet pump working principle. It uses force to create a pumping action by using a pressure differential in a liquid.


Model No | Inlet size | Outlet size | Max Solid | Speed | Self priming |
P2 | 2inch | 2 inch | 44.45mm | 1150-2900rpm | 7.3-7.6m |
P3 | 3inch | 3inch | 63.5mm | 650-2150rpm | 1.5-7.6m |
P4 | 4inch | 4inch | 76.2mm | 650-1950rpm | 1.5-7.6m |
P6 | 6inch | 6inch | 76.2mm | 650-1550rpm | 2.4-7.6m |
P8 | 8inch | 8inch | 76.2mm | 650-1350rpm | 2.4-7.0m |
P10 | 10inch | 10inch | 76.2mm | 650-1450rpm | 2.1-6.7m |
P12 | 12inch | 12inch | 76.2mm | 650-1250rpm | 1.6-4.9m |


Self-priming pump relies on the high-speed rotation of impeller to generate a low-pressure area in the self-priming pump to absorb water, so the self-priming pump must ensure that its water inlet pipe does not leak, that is, the outside air cannot enter the water inlet pipe. Otherwise, it will not only affect the efficiency of the pump, but also produce serious vibration and noise when the pump operates.
(1) Duck feather method: use a duck feather to approach the suspected inlet when the pump is running, and observe the floating of the duck feather. In the same way, you can use lighted cigarettes to operate in this way. Through the floating direction of duck down hair and smoke to help find.
(2) Engine oil method: For air inlet points that are difficult to find out, a little engine oil can be coated on the determined approximate air inlet, and the air inlet is the place where the engine oil is sucked away quickly.

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