PVC lay flat hose pump is an important accessory in the use of PVC lay flat hose. After a long period of use, you will find that its efficiency will gradually decline. What is the reason? According to the analysis of relevant experts, the main reasons for this phenomenon are as follows:
1. Volume loss and mechanical loss: Because of the long service time of the pump, the leakage and resistance caused by mechanical wear increase, which reduces the volume efficiency and mechanical efficiency.
2. Because of the scouring of water flow, the inner wall and impeller of PVC lay flat hose pump channel become rough and uneven, the friction coefficient of PVC lay flat hose pump inner channel increases, and the flow velocity of water in the pump is very large, the head loss increases, and the hydraulic efficiency decreases.
3. Cavitation on the impeller surface of PVC lay flat hose pump: Because of negative pressure on the back water surface of the blade, when the pressure Pk < Pva, honeycomb surface will be produced, which will cause cavitation of the pump blade under the action of electrochemical corrosion.
4. Cavitation, abrasion, corrosion and chemical erosion caused by the processing technology of PVC lay flat hose pump result in voids or cracks in the flow passage of the pump, whirlpools occur when water flows, resulting in loss of hydraulic efficiency. In addition, the inner wall of PVC lay flat hose pump is scaled, which reduces the volume of the pump body, reduces the pumping volume, reduces the roughness of the flow passage and increases the head loss. Both passenger volume efficiency and hydraulic efficiency are reduced.