• +86-21-64911960
  • Call us for Consultation


Six Reasons Affecting Performance of Self-suction pump

  • Contact Us

  • Eu-Flo Pump Industries Co Ltd
  • Pump Expert of European Standard
  • Tel: 021-64911960
  • Phone: 13391393652
  • Email: [email protected]
  • Address:Room 1506, 638 Heng Feng Road, Su He No.1 Mansion,200040.Shanghai,China


You know that the self-suction pump has a self-suction function, however, we often encounter the fact that after we have installed the water pump, the height of self-suction can’t be reached, so what are the factors that affect the self-suction performance of the self-suction pump? Let’s give you a brief introduction:

Self-Priming Pump
Self-Priming Pump EZX

The main reasons for self-suction of self-suction pump:

1. Determination of the reservoir volume and the height of the reservoir

Liquid storage volume means that the volume of the liquid portion of the pump can be stored after the pump is stopped, which is the volume of the pump body below the lowest point of the pump inlet. This volume is mainly a part of the separation chamber of the extruding chamber and the gas liquid. The volume of liquid storage should not be less than half of the design flow. For example, the design flow of the pump, the reservoir volume is not less than, the storage volume is too small [that is, too little liquid stored in the pump]. This makes the time of self-suction increases, and can’t even self-suction; In addition to having sufficient reservoir volume, there must be a certain reservoir height, which is the height of the pump suction minimum to the center of the impeller. Usually, it is approximately equal to the impeller radius.