Multi-stage centrifugal pumps do not have the ability to self-prime. Many users take the multi-stage centrifugal pumps in the same installation method as single-stage centrifugal pumps. The inlets are filled with water before starting the pump, and the water cannot be pumped. A water diversion tube or a water ring vacuum pump can be installed at the pump inlet.
If a multi-stage centrifugal pump needs to be used in the new procurement and selection stage, we can combine the vacuum pump to assemble a set of automatic vacuum auxiliary system according to the actual situation, start the vacuum pump first, and then start the multi-stage centrifugal pump after the vacuum pump pumps up the water. It can realize the self-priming effect of the multi-stage centrifugal pump.
https://www.wxxjyby.com/