Pumps and compressors cover centrifugal, positive-displacement (gear, screw, piston), compressors (screw, piston, centrifugal, scroll). KSB (chemical/water), Grundfos (HVAC/water), Atlas Copco (compressed air), Kaeser (screw compressors) and Kraemer lead the German market.
Pumps & Compressors
Pumps & Compressors
Pumps and compressors cover centrifugal, positive-displacement, screw and piston types. KSB, Grundfos, Atlas Copco an...
Pumps and compressors cover centrifugal, positive-displacement, screw and piston types. KSB, Grundfos, Atlas Copco and Kaeser lead the German-speaking market.
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FAQ
Q Centrifugal vs positive-displacement?
A
Centrifugal: high flow (10-10000 m³/h), low-medium pressure (< 16 bar), flow varies with resistance. PD: low flow, high pressure, stable flow. Viscosity > 100 cSt → PD.
Q Screw compressor advantages?
A
Continuous duty, low vibration, pulse-free, high flow (1-100 m³/min). Cons: noise 75-85 dBA, efficiency varies with load.
Q What is NPSH?
A
Net Positive Suction Head. When NPSH-available < NPSH-required → cavitation damages impeller. Design NPSHa > NPSHr + at least 0.5 m margin.