Why Screw Pumps Should Never Run Dry: A Common Mistake That Damages Equipment
Why Screw Pumps Should Never Run Dry: A Common Mistake That Damages Equipment In many industrial applications, screw pumps are widely used for their stable flow, low pulsation, and ability to handle high-viscosity fluids. However, a common mistake in daily operation often leads to performance decline or even equipment failure: 👉 running the pump dry Many users think running the pump for a short time without liquid is harmless. But in reality: 👉 dry running is one of the most damaging conditions for a screw pump 1. Why Screw Pumps Depend on Liquid A screw pump is a type of positive displacement pump. Its operation is based on: The rotation of the screw inside the stator Formation of sealed cavities to move fluid forward In this process, the fluid itself plays a critical role: 👉 it acts as both the working medium and the lubricant 2. What Happens During Dry Running? When there is no liquid inside the pump: The screw and stator come into direct contact Lubrication is lost Heat can...