Slection and installation notes
selection
When using multistage pumps, first step is to confirm multistage pumps usage and performance parameters and choose pump type. High-tech pump industry provide you with principle, basis of selecting multistage pumps:
1、make the selected multistage pumps type and performance accords with equipment capacity and head, pressure, temperature, NPSH. suction parameters requirements.
2、multistage pumps must satisfy the medium characteristic request.
To transport inflammable, explosive toxic or precious liquids pump, requiring shaft sealing dependable, or using no leakage pump, such as magnetic drive pumps (no shaft seal, using magnetic isolation type indirect drive)
To convey corrosive medium multistage pump, demanding convection parts adopting corrosive resistant materials, such as fluorine plastic anti-corrosive pumps
For conveying solid particles medium multistage pumps, request convection parts adopting wear-resistant materials, when necessary, shaft seal using clean liquid washing.
3、mechanical demand multistage pump high reliability, low noise, small vibration.
4、calculate multistage pumps purchasing costs correctly, including procurement costs and installation maintenance costs.
installation notes
Before multistage pump installation, need to well-done preparatory works
1、assembling personnel should be familiar with multistage pumps structure, understand assembly sequence and assembly method,
2、prepare assembly required tools, measuring tools, etc.
3、each parts should be cleaned, wear parts required repaired,
4、pre-installed spare parts and inspection
To multistage pumps, rotor part (including impeller, impeller block set or impeller wheels and balance plate etc), should be assembled in advance, also known as the rotor small pack or changing outfits, to check rotor concentricity (also called sloshing degrees ≤0.05mm), the distance between slant angle and the impeller inlet. Put the impeller, impeller block set and balanced disk installed on good calibration pump shaft, after locked by sleeves, installed in lathe top or support on v-shaped iron or (bearing bush).
