Goulds VCW Vertical Circulating Water Pumps

Summary

Product identification

• Model: VCW
• Type: Large Vertical Circulating Water Pumps
• Manufacturer: ITT Goulds Pumps

Applications

Goulds VCW pumps are designed for demanding applications, including:

• Power generation cooling (main, intermediate, and secondary water circulation)
• Condenser cooling
• Desalination sea water intake
• Flood protection in storm-ravaged areas
• Waste treatment plants (industrial and municipal)
• Industrial services including descaling, cooling, quench process, fire protection, and API services

Performance

The Goulds Pumps test facilities support:

• Test capacities up to 400,000 GPM (90,850 m³/hour)
• 8,000 hp (6,000kW) capability
• 300 PSIG multiple gear drives

A range chart illustrates the capacity and total dynamic head (TDH) for various VCW models (WCE-GP, WCB-GP, WCA-GP, YDD-GP, WCAX-GP, WMCE-GP, WMCC-GP) across different stages. See the official PDF for exact tabulated values.

Design Features (The Vertical Advantage™)

The VCW pumps incorporate unique design features and patented enhancements:

• Discharge Head: Patented “O” Head design provides consistent flow and eliminates potential resonance frequencies through a comprehensive Finite Element Analysis.
• Impeller: Designed for optimum hydraulic balance by eliminating balance holes. Prototypes are developed from geometrically similar model impellers.
• Wear Rings: Optional feature on the impeller and diffuser/suction bell, made of hardened alloys and easily replaceable to renew design-running clearances.
• Diffuser: Carefully crafted element to recover velocity head by straightening the flow from the impeller.
• Suction Bell: Separately cast, precision component providing smooth flow to the impeller eye with minimized submergence requirements.
• Column and Elbow: Column pipe is fabricated in discrete sections to provide intermediate guide bearings. The elbow can be arranged for either above or below floor discharge.
• Cantilever Impeller Design: Eliminates the tail bearing and lowers NPSH values, improving fluid inlet conditions and hydraulic performance.
• Upper Bearing Support: Option for an extra length or double bearing above the first stage impeller for added stability.
• Hydraulic Enhancements:
  • Suction Bell with flared inlet controls to accelerate fluid to the desired inlet velocity.
  • Outer walls on the bowls provide structural integrity with flange fits for positive alignment.
  • Contour of the diffuser/bowl provides accurate fit to the impeller, maximizing operating efficiency.

Mechanical / Hydraulic Components

• Shaft: Transmits maximum power at well below the pump’s first critical speed. Strict control of shaft straightness provides dependable operation and longer service life.
• Shaft Sleeves: Optional hardened alloy feature at all bearing sleeves and stuffing box locations to protect the shaft and extend service life, designed for easy replacement and maintenance.
• Bearings: Protected from high pressure pumpage and contaminants, isolated inside enclosing tubes in the column pipe (as an alternative). A separate, clean fluid source lubricates bearings and seals.
• Intermediate Coupling: Transmits power and rotation through coupling keys. Thrust loads are transmitted through a split ring design.
• Rigid Adjustable Drive Coupling: Coupling keys and split thrust ring design transmit torque, hydraulic thrust, and pump rotating weight to the driver. Also provides clearance adjustment between wear rings.
• Stuffing Box: Packed with flexible graphite material to reduce resistance and prolong shaft service life. A split gland simplifies packing adjustment and replacement.
• Shaft Enclosing Tube: Insulates the shaft from the pump fluid and provides a passage for bearing lubrication. One end has an O-ring sliding fit for thermal expansion, designed for easy disassembly and reinstallation.

Maintenance Features

• “Pull-Out” Design: This option allows easy removal of the inner element of the pump for maintenance without disturbing the suction bell, column, discharge elbow, or discharge piping. This eliminates the need to drain or enter the pump, significantly reducing downtime and repair costs. Sliding and conical fits ensure proper alignment upon reassembly. This design is available on all ITT Goulds Pumps’ Vertical Pump models and does not affect column size or pumping performance.

Testing and Analysis

Goulds Pumps utilizes advanced analysis and testing methods:

• Computational Fluid Dynamic Analysis: Determines sump flow conditions at the pump inlet for superior performance.
• Critical Speed Analysis: Ensures the first critical speed is well above the maximum operating speed of the pump.
• Mechanical Design Analysis: Defines proper shaft size, configuration, and other critical design features.
• Model Test Data: Validates geometrical similarity between pump models and full-size pumps, aiding in casting, fabrication, machining, and inspection in pump manufacturing.
• Start-Up Analysis: Identifies optimal starting sequences between the pump, driver, and discharge valve, and determines the pump's ability to start under adverse conditions.
• Pump Quality: All pump components and assemblies undergo inspection to ensure reliable operation, meeting the standards of the Hydraulic Institute.

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

Official datasheet (PDF)

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