Many people believe: 👉 “The slower a screw pump runs, the better.”

 Many people believe:

👉 “The slower a screw pump runs, the better.”

And yes, low-speed operation can:

Reduce temperature rise

Lower wear

Extend stator life

But in real industrial applications, many operators later notice:

👉 “The pump feels weaker than before.”

In many cases, the real reason is:

👉 volumetric efficiency begins to decrease.

Why?

Because when speed drops:

Theoretical flow decreases

Internal leakage ratio becomes more noticeable

Especially in older pumps with worn stators:

👉 low-speed operation may lead to more obvious flow loss.

So the key point is:

❌ Slower is not always better

❌ Faster is not always better

The ideal solution is:

👉 choosing a reasonable speed range based on the medium and operating conditions.

In many stable long-term systems:

👉 operators usually avoid excessively high speed.

More technical insights about screw pumps:

👉 https://www.scpv.cn/news/874.html