Goulds 3181 High-temperature/Pressure Paper Stock/ Process Pumps

Summary

Product identification

The Goulds 3181 is a High-Temperature and Pressure Paper Stock/Process Pump, designed for high-temperature and high-pressure services within the Pulp & Paper Industries.

Key features include:

• ANSI Class 300 flange drilling
• Inch-dimensioned O.D. of mechanical seal sleeve
• Inch-dimensioned bearing locknut
• Inch-dimensioned coupling extension
• International Design with metric fasteners and fittings used throughout.
• Maximum Interchangeability: Power end and impellers are completely interchangeable with Goulds Model 3180/3185.
  • Note: Shafts for Models 3181 and 3186 are not interchangeable. Sleeves for mechanical seals on the 3181 and 3186 are not interchangeable.

Operating limits

• Capacities: to 13,000 GPM (3000 m³/h)
• Heads: to 410 feet (125 m)
• Temperatures: to 508˚F (300˚C)
• Pressures: to 360 PSIG (25 bar)

Applications

• Digester recirculation
• Make-up liquor
• White liquor
• Black liquor
• High-pressure/high-temperature pulp mill services
• Hot oil

Mechanical / hydraulic

The Goulds 3181 features a robust design for extended pump life and ease of maintenance.

Design and Construction:

• Casing: End suction, top centerline discharge, self-venting. Centerline mounted for high-temperature services. Back pull-out design.
• Enclosed Impeller: High-efficiency design with large balance holes and back pump-out vanes to minimize stuffing box pressure and axial thrust. Standard with casing and impeller wear rings.
• Labyrinth Seals: Standard labyrinth isolators prevent premature bearing failure caused by lubricant contamination and/or loss of lubricant.
• Dry Shaft: Teflon O-rings in the impeller nut and shaft sleeve ensure positive sealing of the shaft from pumpage.
• Taperbore™ Plus Seal Chamber: Oversized tapered bore seal chamber improves circulation and cooling at seal faces, eliminates solids buildup, and is self-venting and draining for longer seal life. Standard with mechanical seal arrangement; VPE ring is optional.
• Confined Spiral-Wound Gasket: Spiral-wound stainless steel provides a metal-to-metal fit between the casing and cover.
• Casing and Impeller Wear Rings: Renewable wear rings, fastened by set screws, minimize maintenance costs.
• Shaft/Bearings: Heavy-duty shaft designed for minimum deflection for long seal and bearing life. Bearings are sized for optimum life under tough conditions.
• Centerline Supported: For high-temperature services, eliminating misalignment of pump and motor shafts due to thermal expansion of the casing.

Maintenance Features:

• Back Pull-out Construction: Allows the unit to be removed without disturbing suction and discharge piping, facilitating simple and fast installation of a spare power end.
• External Impeller Adjustment: Enables easy renewal of impeller clearances on-site with minimum downtime to maintain original hydraulic performance.
• Condition Monitoring (U.S. Patent 8,154,417): Constantly measures vibration and temperature at the thrust bearing. Colored LEDs indicate general pump health, providing early warning of improper operation.
• Conditioning Monitoring Sites: Allow easy and consistent monitoring of temperature and vibration for preventive maintenance.
• Maximum Stuffing Box / Seal Chamber Accessibility: Allows easy maintenance of packing or mechanical seal.

Performance Curves: Hydraulic coverage charts are provided for 50Hz and 60Hz operation, detailing various pump sizes and RPMs (e.g., 1180 RPM, 1780 RPM, 960 RPM, 1470 RPM) across a range of capacities and total heads. See the official PDF for exact tabulated values and detailed performance curves.

Sectional View and Parts List: A sectional view of the pump is included, illustrating various components. However, the extracted text does not contain a detailed parts list or materials of construction.

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

Official datasheet (PDF)

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