Wet Pit Column Pumps

Summary

Product identification

The Goulds VTP is a single casing, diffuser-type, vertical turbine pump designed for continuous duty in wet-pit or deep well applications where NPSH available is ample. It is available in single or multiple stage configurations.

Operating limits

• Flows: to 13 600 m³/h (60 000 gpm)
• Heads: to 700 m (2300 ft)
• Pressures: to 100 bar (1450 psi)
• Temperatures: from -45°C (-50°F) to 300°C (570°F)
• Sizes: from 150 mm (6 in) to 1375 mm (54 in)
• Settings: to 365 m (1200 ft)
• High-pressure Stuffing Box: for working pressures up to 20 bar (300 psi). Low and extra high pressure stuffing boxes are also available.

Feed water

• Product Lubrication utilizes open lineshaft construction, allowing lineshaft bearings to be lubricated by pumped liquid.
• Enclosed oil lubrication isolates the lineshaft and bearings from the pumped liquid; alternative lubricants such as clean water or grease can also be used with enclosed lineshaft construction.
• A Sand Collar prevents grit from entering the suction bell bearing.
• A Basket Strainer exceeds Hydraulics Institute parameters; Cone strainers are provided for deep well installations.

Electrical

• Multiple drivers are supported, including electric motors (solid or hollow shaft), engines with right angle gear drives, and steam turbines.
• A Vertical Hollow Shaft Motor allows the pump headshaft to extend through the motor and provides impeller clearance adjustment.
• An Integral Axial Thrust Bearing Assembly is available on VTP pumps with IEC motors.

Mechanical / hydraulic

• Construction Options:
  • Open or enclosed lineshaft construction
  • Enclosed or semi-open impellers, keyed or collet mounted
  • Bowl and enclosed impeller wear rings
  • Cast iron or fabricated steel discharge heads
  • Above ground or below ground discharge flanges
  • Separate axial thrust bearing assembly
  • Standard and ISO 13709/API 610 (VS1), latest edition configurations
• Sealing Configurations:
  • For open lineshaft construction: Packed box with flexible graphite packing; Single or dual mechanical seal.
  • For enclosed lineshaft construction: Enclosing tube tension assembly for oil lubrication; Water injection packing assembly.
• Key Features:
  • Threaded Column Pipe minimizes well pump casing diameter.
  • Discharge Head with ASME Class 125 or 250 flat face flange. Heavy-duty discharge heads with ASME Class 150, 300 or 600 raised face flanges are available (cast iron discharge heads available to 500 mm (20 in) discharge).
  • Prelubrication Connection to an external lubrication source is available for deep set pumps.
  • Lock Collets provide an interference fit between the bowl shaft and impeller. Keyed impellers are standard for 500 mm (20 in) and larger models and optional on other sizes. Collet mounting is standard for impellers up to 460 mm (18 in).
  • Bearing Brackets with Rubber Lineshaft Bearings fit between column sections; integral to column pipes 40 mm (16 in) and larger.
  • Discharge Case with hydraulic adapter ensures efficient transfer of flow to various column sizes.
  • Bowl and Bell Bearings with high length-to-diameter ratio provide rigid support for the bowl shaft.
  • Suction Bell provides efficient flow of liquid into the eye of the first stage impeller; a suction case is provided for well pump applications.
  • Enclosing Tube provides lineshaft protection from the pumped liquid; lineshaft bearings are spaced at 1.5 m (5 ft) intervals.
  • An Enclosing Tube Stabilizer is integrally welded to the column pipe (rubber stabilizers for column sizes to 355 mm (14 in); steel stabilizers for 400 mm (16 in) and larger).
  • A Tension Bearing holds the enclosing tube and lineshaft bearings in alignment.
  • A Rigid, Adjustable Flanged Coupling provides accurate impeller clearance adjustment and shaft stability. A spacer coupling allows access to the mechanical seal without removing the motor.
  • A Separate Steel Soleplate allows grouting and leveling of the pump discharge head without permanently anchoring it.
  • Flanged Column Pipe contains the pressure and has a rabbet fit between the flanges to maintain alignment.
• ISO 13709/API 610 Compliant Features:
  • Weld neck flanges
  • Precision, rigid adjustable flanged spacer coupling
  • Seal chamber with jackscrews
  • Studs and nuts
  • O-ring construction
  • One-piece pump shaft up to 6 m (20 ft)
  • Dynamically balanced, keyed enclosed impellers
  • Pinned wear rings
  • ISO 13709/API 610 forces and moments
• Range Chart: See the official PDF for exact tabulated values.

Applications

• Municipal water
• Irrigation
• General industrial
• Snow making
• Power generation
• Oil and gas production
• Hydrocarbon processing
• Mining
• Storm water
• Sump service

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Disclaimer: This summary is based on extracted text and may miss figures, footnotes, or the latest revisions. Contractual data must always match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror