Let’s discuss whether cavitation can occur in screw pumps
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When selecting a pump, centrifugal pumps can experience cavitation; will screw pumps also suffer from cavitation? If so, what are the consequences?
Cavitation can occur; it results from the low pressure at the suction inlet, which causes the liquid to vaporize. The gas then impacts the components of the pump. In theory, cavitation can happen in any pump, depending merely on the suction inlet pressure at which it occurs. However, screw pumps are positive-displacement pumps; cavitation causes noise and vibration as well as a decline in performance, but it generally does not cause damage to the pump.
What are the differences between screw pumps, centrifugal pumps, reciprocating pumps, and Roots pumps?
In response to the issue described here, the following is stated: 1. Cavitation occurs in centrifugal pumps as calculated; under the same operating conditions, screw pumps may not experience cavitation. 2. Screw pumps can also experience cavitation, depending on the specific circumstances; this is mainly related to the inlet pressure and the selection of the screw pump. 3. In most cases, the required NPSH for screw pumps is lower.
In principle, cavitation is possible; screw pumps are used less often, and I haven’t had any experience with them personally