Key factors:
1) Chemical compatibility of wetted materials,
2) Operating temperature and pressure,
3) Presence of abrasive particles,
4) Proper installation and alignment,
5) Regular maintenance,
6) Cavitation avoidance,
7) Motor operating conditions.

Pumps adapt via:
1) Casing and impeller designed for pressure ratings,
2) Mechanical seals rated for specific pressure ranges,
3) Variable speed motors to adjust pressure output,
4) Multi-stage designs for higher pressure applications.

Corrosion-resistant pumps prioritize material compatibility and chemical durability over raw efficiency. They use engineered plastics or special alloys for wetted parts, incorporate robust sealing systems, and are designed for specific chemical resistance rather than general-purpose water handling.

At higher altitudes:
1) Reduced atmospheric pressure lowers NPSH available — select pumps with better NPSHr,
2) Self-priming height decreases,
3) Motor cooling efficiency drops due to thinner air — consider derating,
4) Verify motor performance at altitude.

Selection is based on:
1) Chemical composition and pH of the fluid,
2) Required flow rate and head,
3) Operating temperature,
4) Solid particle content,
5) Installation environment,
6) Safety requirements (explosion-proof, leak-free).

Different pump types suit different chemical environments: PVDF pumps handle strong acids and oxidizing agents; PP pumps work for general corrosive liquids; stainless steel pumps fit high-temperature or food-grade applications; magnetic pumps are ideal for toxic, flammable, or leak-sensitive media.