If you could provide more details about what "KSBJ-291" refers to, I would be more than happy to give you a more tailored and specific guide following the structure above.
KSB J‑291 Centrifugal Pump – Detailed Technical Write‑Up
(Prepared April 2026 – intended for design‑engineers, specification writers, plant‑operations and maintenance staff) KSBJ-291
| Item | Recommended Practice | |------|-----------------------| | Suction pipe | Minimum pipe length: 3 D (≈ 1 m for DN 300) straight pipe upstream of the pump; avoid elbows within this length. | | Net Positive Suction Head (NPSHA) | Verify NPSHA ≥ NPSHR + 0.5 m (safety margin). Use a pressure‑transducer or calculate based on fluid level, vapor pressure, and friction losses. | | Check valve | Install downstream of the pump only if the system requires back‑flow protection; otherwise, a non‑return valve adds unnecessary head loss. | | Strainer | Use a Y‑type strainer (mesh ≈ 2 mm) upstream; cleanable without dismantling the pump. | | Discharge | Provide at least 2 D of straight pipe downstream of the pump before the first valve or bend. | If you could provide more details about what
The J‑291 family is geometrically similar, allowing the use of the affinity laws to extrapolate performance for other sizes (DN 90‑600). All curves are supplied in the KSB “Pump
All curves are supplied in the KSB “Pump Performance Handbook – J‑Series” (Rev 3, 2024) and are available as an Excel spreadsheet for quick sizing.