Answer: 1. Install the vacuum pump: Before starting the multistage centrifugal pump, open the vacuum pump, pump to the vacuum state, and bring the water up.
2. Install the bottom valve: Generally, the way we achieve self-priming of the pump is to install the bottom valve. The bottom valve is installed in the water inlet position, so that only the first need to fill the water outside, no need to fill the water again in the future.
3. Water diversion method of pump front tank: a cylindrical water tank is installed in front of the multistage pump, the top of the cabinet is a hemispherical projection, and a suction pipe is installed in the middle of the cabinet. The pipe mouth is lower than the height of the barrel body, and the outlet under the cabinet body is connected with the suction pipe of the pump. Before the first use of the water tank, fill the water tank with water from the water filling port, and then close the water filling port. Start the centrifugal pump operation, the instant pump will pump the water in the water tank, the water level gradually decreases, the volume gradually increases, forming a vacuum state, producing suction, so as to suck the water of the suction pool into the water tank, the pump continues to run, the water is continuously pumped out.
4. Water storage method: use a large wooden barrel or water cylinder to store water and place it at the outlet of the centrifugal pump; Or when a pool is built near the side of the centrifugal pump pump house, the bottom of the pool is slightly lowered to form a storage pool. Sanchang pump industry uses water pipes to connect the barrel (or pool) with the pump body filling hole. Before shutdown, use the water from the outlet pipe to fill the barrel for reserve, and the next time to start the centrifugal pump, it can be filled with water. This method fills with water and is easy to use.