Submerisble pumps SJS

Summary

Product identification

The Sulzer SJS is a submersible pump designed for various applications, including:

• Seawater lift
• Ballast water
• Mine dewatering
• Cooling water
• Municipal water supply
• Offshore firewater

Operating limits

Pump Operating Data:

• Pump sizes: up to 915 mm (up to 36 inches)
• Capacities: up to 10,000 m³/h (up to 44,000 USgpm)
• Heads: up to 230 m (up to 750 feet)
• Pressures: up to 40 bar (up to 600 psi)
• Temperatures: up to 80°C (up to 180°F)

Motor Performance Range:

• Power: 100 KW to 2,200 KW
• Speeds: 2 to 8 pole speeds
• Voltage: 220 to 11,000 V
• Phase: 3 phase
• Frequency: 50 Hz or 60 Hz

Electrical

The motors are water-glycol filled, submersible, three-phase, squirrel-cage induction types with IP-68 protection.

• Designed for across-the-line starting.
• Suitable for Variable Frequency Drive (VFD) operation.

Motor Features and Benefits:

• Stator and windings: Stator laminations and winding wire are securely held. Polymer insulation and polyamide (PA) sheathing encapsulate windings for the water-glycol environment. Squirrel cage rotor laminations are mounted on a ground stainless steel shaft.
• Motor lubrication and cooling: High energy motors are filled with an environmentally friendly water-glycol solution for bearing lubrication and internal component cooling. Heat radiated through the motor frame is removed by pumpage flow outside the motor.
• Motor pressure compensation: An external tank or accumulator (for inverted motor) compensates for water-glycol expansion to prevent over-pressuring the mechanical seal.

Mechanical / hydraulic

Pump Features and Benefits:

• Surface plate and discharge flange: Fabricated to meet customer connection requirements.
• Column pipe: Eliminates lineshaft and bearings, allowing the submersible motor and bowl assembly to operate at higher speeds, potentially reducing pump and caisson size. Column connections are flanged and designed to reduce friction and support the unit.
• Bowls and impellers: Utilizes thousands of proven Sulzer hydraulic combinations.
• Bowl bearings: Provide radial support and dampen vibration.
• Single piece cable: No cable splices; terminations only at the terminal box and inside the motor.
• Inverted configuration: For lower submergence or lower Net Positive Suction Head (NPSH) requirements, the bowl assembly can be mounted below the motor. The motor is then constructed with a flow sleeve to route flow from the bowl assembly, past the motor, and into the column pipe.
• Cathodic and anti-fouling protection: Reduces marine growth and prolongs the Mean Time Between Removals (MTBR).

Motor Features and Benefits:

• Motor radial and thrust bearings: Motor rotor supported in spiral grooved carbon sleeve radial bearings. High capacity, hydrodynamic thrust bearing designed for high temperature service and suitable for rotation in both directions. Features a hardened steel ground, key-driven thrust collar and graphite-composite thrust bearing shoes or pads sized for pump thrust and motor/pump rotor weight. The thrust bearing pedestal utilizes a central pivot for self-alignment.
• Motor shaft seal: A mechanical seal is provided at the motor shaft extension to prevent contamination of the motor by the pumpage. An expansion tank or accumulator ensures the pressure in the motor is higher than in the pumpage.

Materials: The pump components are available in various material combinations:

Performance Ranges: A graph illustrating Capacity Q (m³/h, USgpm) versus Head H (m, ft) is available in the official PDF. See the official PDF for exact tabulated values or performance curves.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror