Goulds LP 3400 Double Suction Fan Pumps

Summary

Product Identification

The Goulds LP3400 Series are Low Pulse Fan Pumps, designed for headbox applications in paper machines. The document mentions the Model LP3410 pump as an example.

Operating Limits

Goulds LP3400 Fan Pumps are designed for high reliability and low maintenance, with specific performance ranges:

• Small Capacity:
  • Flow: up to 1817 m³/hr
  • Heads: up to 259 m
• Large Capacity High Heads:
  • Flows: up to 14,800 m³/hr
• Extra Large Capacity:
  • Flow: up to 51,000 m³/hr
  • Inlet size: up to 2000 mm
• Pressure Pulsations: Designed for less than 1000 Pascals (0.0102 kilograms/cm²)
• Impeller Balancing: Dynamically balanced to ISO 1940, G2.5 tolerances.
• Impeller Trim: Selected to be less than maximum diameter, within a range of 75% to 105% of the pump’s best efficiency point.

Mechanical / Hydraulic

The LP3400 series incorporates several standard design features for reliable low pulse headbox pumping:

• Double Suction Impeller: Minimizes axial thrust for longer bearing life. Dynamically balanced to ISO 1940, G2.5 tolerances. Features a split and staggered design for low pulsation pumping. A "Cotton Ball" finish to Ra 2.5 is available for fine paper applications.
• Renewable Casing Wear Rings: Eliminate casing wear and allow easy maintenance of proper running clearances. Positively locked in the lower casing half to prevent rotation.
• Heavy Duty Shafts: Designed for minimum deflection, extending shaft seal and bearing life. Available as double-ended shaft design, in either left-hand or right-hand rotation.
• Heavy Duty Casings: Rugged foot-mounted design to resist external forces and vibration. Designed to withstand high working pressures with minimum distortion and are 100% hydrostatically tested. Suction and discharge connections are in the lower half casing, allowing removal of the upper half casing or complete rotating element without disturbing piping or driver. A "Cotton Ball" finish to Ra 2.5 is available for fine paper applications.
• Balanced Design: Dual volute casing design (not used on all sizes).
• Large Inlet Areas: Reduce NPSH requirements and assure smooth, quiet flow to the impeller. Matched inlet and outlet connectors are available.
• Renewable Shaft Sleeves: Sealed at the impeller and sleeve nuts to prevent liquid contact with the shaft. Available in a variety of materials, including hardened metals and hard metal coated.
• Stuffing Box: Packing is standard. A wide variety of mechanical seals, including cartridge and split types, are available.
• Renewable Impeller Wear Rings: Positively locked on impeller hubs, permit easy renewal of running clearances and protect impeller hubs from wear. Standard on large and extra large capacity pump sizes, optional on all others. "Flashed" as standard to prevent paper stock build-up.
• Double Row Thrust Bearing: Standard on all Goulds Fan Pumps, providing high axial thrust capability.
• Labyrinth Bearing Protection: Standard on all Goulds Fan Pumps, reducing the risk of bearing contamination and improving mean time between failure.

Materials of Construction

The pumps are constructed with robust materials to meet demanding services:

Material Equivalents

Electrical

PUMPSMART® Control Solutions are available for dedicated pump control and protection, offering variable speed control that can cut energy costs up to 70%. These solutions support multi-pump control and sizes up to 700 hp.

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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 official OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror