"> Sulzer SJT-CWP
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Sulzer

SJT-CWP

Sulzer SJT-CWP — Vertical cooling water pump for thermal power, combined-cycle power plants, water supply, irrigation, seawater intake for LNG regasification terminals, marine engine cooling.

Components & Design

Component data being added…

Technical Data

Impeller Diameter 350 mm - 1920 mm (14 - 76 inches)
Capacity Up to 90,000 m³/h (396,000 USgpm)
Head Up to 60 m (200 ft)
Pressure Up to 8.6 bar (125 psi)
Temperature Up to 50°C (122°F)
Specific Speed Ns 75 - 155 (nq 75)
Design Type Single-stage, mixed-flow, vertical, semi-open or closed impeller

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Common failures & inspection points

Cavitation and NPSH (Net Positive Suction Head) Verification

Verification of available and required NPSH against datasheet specifications; control of suction conditions and piping design; measurement of static and dynamic pressure at suction line

Material compatibility with seawater and freshwater

Verify housing material (stainless steel duplex/super-duplex vs. carbon steel) against operating fluid; perform corrosion testing per ASTM G48 or equivalent; check wear parts (wear rings, seals) for saltwater resistance

Vibration and imbalance at high flow rates

Vibration measurement (ISO 20816 or ISO 10816) at rated speed and load; check impeller balancing (ISO 1940); monitor bearing temperatures and clearance; test for wear on wear rings

Seal system integrity and leakage losses

Check condition of mechanical seals or labyrinth seals; measure leakage flow; control for corrosion on seal faces; inspect pressure relief systems for seawater/freshwater applications

Hydraulic performance and wear effects

Flow and pressure measurement during operation; compare with manufacturer curves; control for wear ring wear; check for cavitation phenomena or backflow indications; verify efficiency against specification

Type-general inspection and maintenance points for this equipment category — not model-specific.

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Equipment Model #145207 · ✓ still in production