Goulds 3409 Medium Capacity Double Suction Pumps

Summary

Product Identification

The Goulds 3409 is a Medium Capacity, Single Stage, Double Suction Pump. It is designed for a wide range of Industrial, Marine, and Power Generation Services.

Operating Limits

• Capacities: to 12,000 GPM (2725 m³/h)
• Heads: to 850 feet (259 m)
• Temperatures: to 250° F (120° C)
• Working Pressures: to 400 PSIG (2758 kPa)

Mechanical / Hydraulic

Design Features

• Horizontally Split Casing: In-line suction and discharge nozzles in lower half casing for ease of inspection/maintenance.
• Double Suction Impeller: Assures Hydraulic Axial Balance for lower thrust bearing loads, longer pump life, and low maintenance.
• Wear Rings: Easily replaceable wear rings renew running clearances, protect against impeller, casing wear.
• Sealing Flexibility: Choice of packing or wide range of mechanical seals.
• Installation Versatility: Horizontal or vertical mounting, clockwise or counter clockwise rotation.
• Material Flexibility: Available in a wide variety of metals from cast iron to stainless steels.

Heavy Duty Design Features

• High Thrust Capability: Spherical roller bearings handle unexpected thrusts, secured with locknut and washer.
• Renewable Case Wear Rings: Permits easy maintenance of proper running clearances, locked in lower half casing to prevent rotation.
• Large Inlet Areas: Assures smooth flow to impeller inlet for efficient, quiet operation.
• Heavy Duty Shaft: Designed to reduce deflection. Renewable shaft sleeves fully protect shaft from pumpage. Threaded sections removed from stress areas.
• Labyrinth Bearing Protection: Labyrinth bearing isolators significantly reduce the chance for bearing contamination and greatly improve mean time between failures.
• Double Suction Impeller: Minimizes axial thrust, highly efficient for smooth, vibration-free operation.
• Dual Volute Casing Design: Dual volutes having cutwaters 180º apart provide opposing radial forces reducing radial loads on bearings and minimizing shaft deflection.
• Positive Liquid Sealing: Gaskets between impeller and sleeves, and O-rings between sleeves and sleeve nuts protect shaft from pumpage or confined corrosion attack.
• Renewable Impeller Wear Rings Available: Mechanically locked onto impeller hubs.
• Heavy Duty Casing: Casing walls designed to withstand pressure extremes. Rugged design resists external forces and vibrations. Both suction and discharge connections in lower half casing. Removal of upper half casing permits inspection, maintenance and removal of the complete rotating element without disturbing piping or driver.

Materials of Construction

• Casing: Cast Iron, 316SS
• Impeller: Bronze, 316SS
• Lantern Ring: Teflon, Graphite Impregnated Yarn
• Packing Gland: Carbon Steel, Cast Iron
• Mechanical Seal Gland: Steel (Anti-Friction)
• Shaft: Nitronic 60
• Shaft Sleeve Nut: Nitronic 60
• Shaft Sleeve: 316SS
• Casing Wear Ring: 316SS
• Bearing Housing: Cast Iron
• Impeller Wear Ring (optional on 3409): Bronze, 316SS

Dimensions and Weights

A table of dimensions (in inches and mm) and weights (in lbs and kg) is available in the official PDF for various pump sizes. These dimensions are not to be used for construction or installation purposes.

• Standard Rotation: Right hand (CW).
• Optional Rotation: Left hand (CCW).
• Flange Details:
  • 125#FF ANSI Suction and Discharge Flanges are standard, unless otherwise specified.
  • Sizes 6X10-22, 8X12-22M, 8X12-22L are furnished with 250# FF discharge flange as standard.
  • Size 8X12-27 is furnished with 250# FF suction and discharge flange as standard.
  • Steel casings will have 150#RF or 300#RF flanges.

Services

• Process: Quench water, stripper bottoms, reboiler circulation, cooling tower
• Pulp & Paper: Primary and secondary cleaner, filtrate, mill water supply shower, fan pump
• Primary Metals: Cooling Water, Quench and Leaching
• Municipal: High Lift, Low Lift, Wash Water, Waste Water, Raw Water
• Power Generation: Cooling Tower, Component Cooling, Service Water, Ash Sluicing, Heater Drain
• Marine: Bilge and Ballast, Cargo, Cooling Water, Fire Pump
• General: River Water, Brine, Sea Water

Hydraulic Coverage

Performance curves for Model 3409 at 1785 RPM and 1180/880 RPM, showing Total Head vs. Capacity, are available in the official PDF.

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

Official datasheet (PDF)

Lenntech datasheet mirror