The self-priming height of the self-priming pump is related to factors such as the front seal gap of the impeller, the number of revolutions of the pump, and the liquid level of the separation chamber. The smaller the front seal gap of the impeller is, the larger the self-suction height is, which is generally 0.3~0.5 mm. When the gap is increased, the lift and efficiency of the pump are reduced except for the self-suction height. The self-priming height of the pump increases with the increase of the circumferential speed u2 of the impeller, but when the maximum self-suction height is increased, the number of revolutions increases and the self-suction height does not increase any more. At this time, only the self-priming time is shortened; When falling, the self-priming height decreases. Under other conditions, the self-priming height also increases with the increase of the storage height (but it cannot exceed the optimal storage height of the separation chamber). In order to better mix the gas and water in the self-priming pump, the blades of the impeller should be less, so that the pitch of the cascade is increased; and the semi-open impeller (or the wider impeller of the impeller channel) should be used, so that Convenient for the return water to penetrate into the impeller cascade.
Most of the self-priming pumps are matched with the internal combustion engine and are mounted on a movable trolley, which is suitable for field work.
2. Install the rocker-type sprinkler, and then spray the water into the air, and then spray it into small raindrops. It is a good tool for farms, nurseries, orchards and tea gardens.
3. It is suitable for clear water, sea water and chemical medium liquid with acidity and alkalinity and slurry with general paste (media viscosity ≤100 centipoise, solid content up to 30%).
4. It can be used with any type and specification of filter press, and the most suitable pump type for pumping the slurry to the filter press for pressure filtration.