Ksbj-291 Direct
| Feature | Detail | |---------|--------| | Impeller | Closed, backward‑curved (BC) design; detachable, balanced, and reversible. Material: high‑strength cast iron (DIN 1699) or stainless steel (AISI 304/316). | | Volute | Split‑case volute with removable cover for easy inspection. Material matches impeller (cast iron or stainless). | | Shaft | Hardened steel, key‑less (splined) connection to motor hub; C3 tolerance class for high‑speed service. | | Bearings | Double‑row angular contact ball bearings, lubricated for life (sealed). Optional ceramic hybrid for high‑temperature service. | | Mechanical seal | Dual‑seal arrangement (single‑seal option available). Materials: carbon‑silicon carbide (C‑SiC) or ceramic‑ceramic; optional oil‑free seal for sanitary applications. | | Casing | Rigid, bolted split‑case (16‑bolt pattern). Standard pressure rating: PN 10 (≈ 1 bar) – can be ordered up to PN 16 with reinforced flange. | | Suction & discharge | DN 90 (3‑inch) up to DN 600 (24‑inch) flanges; ANSI‑B16.5 or EN‑1092‑1. Optional threaded or welded connections. | | Base & mounting | Rigid footplate with integrated vibration isolation pads (optional). Can be mounted on a skid, concrete pad, or directly on a machine frame. | | Drive coupling | Rigid (direct) coupling with key‑less spline hub; optional flexible coupling for misalignment compensation (up to 0.5 mm). | | Cooling | Pump body serves as the primary heat sink; optional external water jacket for high‑temperature fluids. |
| 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. |
| 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).
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.
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Introducing the KSBJ-291: A Revolutionary Multi-Functional Device | Feature | Detail | |---------|--------| | Impeller
The KSBJ-291 is an innovative device that combines the features of a portable air purifier, a humidifier, a night light, and a Bluetooth speaker. This compact and sleek device is designed to provide a comfortable and enjoyable environment for users, making it perfect for homes, offices, or outdoor use.
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| 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.
The J‑291 is supplied with a performance map that covers the full range of operating points from the shut‑off head down to the free‑delivery (zero‑head) flow. The curves are derived from CFD‑validated design and verified in‑plant.
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 Performance Handbook – J‑Series” (Rev 3, 2024) and are available as an Excel spreadsheet for quick sizing.
| 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) |
Corrosion‑resistant versions (stainless) are recommended for:
