Which is better, a centrifugal pump with a coupling or a direct-coupled centrifugal pump

Direct-coupled centrifugal pumps and centrifugal pumps with couplings each have their advantages and disadvantages. The specific choice should be based on the application scenario:

Characteristics of direct-coupled centrifugal pumps

• ‌ advantages ‌ : Compact structure, small floor space, no need to adjust the concentricity of the shaft system during installation, and smooth operation. ‌

• ‌ disadvantage ‌ : When the pump shaft is worn, the entire motor rotor needs to be replaced, resulting in high maintenance costs; The quality requirements for motor bearings are relatively high. ‌

Features of centrifugal pumps with couplings

• ‌ advantages ‌ : Only the pump shaft needs to be replaced during maintenance, resulting in a relatively low cost; Some models come with a base, which is convenient for installation and debugging. ‌

• ‌ disadvantages ‌ : It occupies a large area and requires precise adjustment of the shaft system concentricity during installation; Coupling components are prone to damage (such as buffer rubber), and there are many vulnerable parts. ‌

Suggested applicable scenarios

• ‌ prefer direct connection type ‌ : when there are requirements for compact structure, easy installation and low maintenance cost (such as in scenarios with limited space or frequent maintenance).

• ‌ Prefer the coupling type ‌ : when the pump shaft wears frequently or requires lower maintenance costs (such as the continuous operation demand in industrial production). ‌