The self-priming height of the self priming trash pump is related to the pre-impeller sealing gap, the number of revolutions of the pump and the height of the separation chamber. The gap between the impellers is small, and the higher suction height is generally 0.3 to 0.5 mm; when the gap is increased, The lift and efficiency of the pump are reduced except for the suction height. The self-priming height of the pump increases with the increase of the circumferential speed of the impeller. When the maximum self-priming height increases, the number of turns increases and the self-priming height does not increase. The number of rotations is reduced and the self-priming height is reduced. So how to improve the suction of the self priming trash pump:
First: The suction pipe end of the suction pump is equipped with a suction bottom valve. The suction bottom valve is actually a check valve, which ensures that the water can only be sucked by the pool suction pipe and cannot be reversed. Therefore, if the suction pipe is filled with water, although the upper water level of the water level of the water tank is higher, the function of the water suction bottom valve is Water will not flow into the pool, so that the water pipe will be filled with water, ensuring that the pump can start automatically and quickly.
The reliability of this water absorption method is affected by the water quality of the bottom valve, such as closed, leaking, the water pipe can sink slowly, the time is extended, the water pipe has no water, and the water pump starts to require manual irrigation.
Second: The self priming trash pump reduces the bend, height and horizontal distance of the intake pipe.
Third: self priming trash pump set pump suction box.
This method requires a water tank to be installed in the suction pipe of the pump. Before the pump is operated for the first time, the tank should be filled with water. After the first operation, the height of the water inlet pipe is higher than the height of the pipe surface, although it is lower than the water tank. The water level of the water tank, the water in the water tank will not flow back into the pool, so the water tank can store a certain amount of water. Since the water tank height is lower than the height of the tube surface, the water supply pump is filled with water, and the pump is operated again. The water is the drain pump, the negative pressure inside the tank, the water in the pool under the action of atmospheric pressure, and the added water tank, which absorbs the pool in the pool.
Fourth: The self priming trash pump installs the vacuum pump on the suction pipe of the pump. Before the pump starts, the vacuum pump starts, and the pump is filled with water first, so that the pump can start automatically and quickly. This method of pumping requires a sophisticated automatic control system to ensure proper operation.