Ksbj-291
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.
| Flow (m³ h⁻¹) | Head (m) | Power (kW) | Efficiency (%) | |---------------|----------|------------|-----------------| | 0 (shut‑off) | 88 | 0 | – | | 50 | 78 | 9.5 | 71 | | 100 | 62 | 14.5 | 79 | | 150 | 45 | 17.2 | 81 | | 180 (BE) | 36 | 18.1 | 85 | | 210 | 26 | 18.8 | 79 | | 240 | 15 | 19.0 | 73 | | 260 (free‑delivery) | 5 | 18.5 | 68 |
*BE = Best‑Efficiency Point (≈ 180 m³ h⁻¹ for this size). KSBJ-291
The NPSHR (net positive suction head required) at BE is 0.9 m (≈ 3 ft). This value is a strong indicator of the pump’s ability to operate on low‑suction systems without cavitation.
| Item | Description |
|------|-------------|
| Product family | KSB J‑Series (single‑stage, end‑suction, close‑coupled centrifugal pumps) |
| Model | J‑291 |
| Design purpose | General‑purpose liquid handling for water, light oils, and non‑corrosive chemicals in HVAC, municipal, industrial and agricultural applications. |
| Typical ratings | 0.5 – 250 m³ h⁻¹ (≈ 130 – 66 000 gpm) at heads up to 90 m (≈ 300 ft). |
| Drive options | Direct‑coupled to a standard 3‑phase motor (up to 355 kW) or optional belt‑drive configuration. |
| Certifications | ISO 9001, ISO 14001, ATEX‑II 3G (explosion‑proof version), CE‑marked, ANSI/ASME B73.1 compliance. |
| Key selling points | • Compact, low‑profile design (≤ 1.2 m overall height)
• High‑efficiency hydraulic profile (up to 85 % at BEP)
• Easy access for maintenance (removable volute/impeller)
• Wide range of impeller‑diameter (D = 290 mm nominal)
• Robust cast‑iron or stainless‑steel (AISI 304/316) construction. | If you could provide more details about what
The J‑291 is the “work‑horse” of KSB’s J‑Series, often chosen when a reliable, low‑maintenance pump is needed in a relatively confined installation space. It is especially popular in:
| Component | Standard Material | Optional Materials | |-----------|-------------------|---------------------| | Casing & volute | Cast iron (DIN 1699) | Stainless steel AISI 304, 316 (corrosive media) | | Impeller | Cast iron (DIN 1699) | Stainless steel AISI 304/316, bronze (high‑temperature) | | Shaft | Hardened carbon steel (C45) | Duplex stainless (for aggressive environments) | | Mechanical seal | Carbon‑silicon carbide (C‑SiC) | Ceramic‑ceramic, PTFE‑graphite (food‑grade) | | Bearing housing | Cast iron | Stainless steel (for sanitary) | | Gasket | Spiral wound (graphite) | PTFE, metal‑to‑metal (high‑temperature) | | Component | Standard Material | Optional Materials
Corrosion‑resistant versions (stainless) are recommended for:
| Parameter | Value | |-----------|-------| | Overall length (center‑to‑center) | 1 080 mm | | Overall width (including flange) | 780 mm | | Overall height (incl. motor) | 1 150 mm (motor‑mounted) | | Impeller diameter (D) | 291 mm | | Shaft length (motor to bearing) | 340 mm | | Weight (dry, cast‑iron) | ≈ 210 kg | | Weight (dry, stainless) | ≈ 185 kg |
Note – Exact dimensions vary with nominal flow class (DN 90‑600). All dimensions are given in millimetres (mm) unless otherwise noted.