Goulds 3796 i-FRAME Self-Priming Process Pumps

Summary

Product Identification

The Goulds 3796 is a line of self-priming process pumps featuring patented intelligent monitoring. These pumps are specifically designed to provide superior performance for self-priming services within the Chemical Process Industries.

Available models include:

• 1x11/2-6
• 11/2x11/2-8
• 2x2-10
• 3x3-10
• 4x4-10
• 3x3-13
• 4x4-13
• 6x6-13

Operating Limits

• Capacities: Up to 1250 GPM (284 m³/h)
• Heads: Up to 430 feet (131 m)
• Temperatures: Up to 500° F (260° C)
• Pressures: Up to 375 PSIG (2586 kPa)
• Effective Static Lift: Up to 20 feet (6 m)
• Maximum Liquid Temperature:
  • Oil/Grease Lubrication without Cooling: 350° F (177° C)
  • Oil Lubrication with Finned Cooler: 500° F (260° C)
• Maximum Shaft Deflection: 0.002 in. (0.05 mm)
• Power Limits (per 100 RPM):
  • 1.1 HP (0.82 kW)
  • 3.4 HP (2.6 kW)
  • 5.6 HP (4.2 kW)
• Casing Corrosion Allowance: 0.125 in. (3 mm)

Services

The Goulds 3796 pumps are designed for a total range of industry services, including:

• Industrial sump
• Mine dewatering
• Chemical transfer
• Bilge water removal
• Coal pile drainage
• Tank car unloading
• Filter systems
• Petroleum transfer
• Aircraft fueling
• Column bottoms and reflux

Mechanical / Hydraulic

Performance Features

• One-piece casing with integral priming and air separation (no external priming chamber or air separator required)
• No suction check valve required
• Rapid priming time
• Positive retention of pumpage under siphon conditions
• Self-purge of vapors
• i-FRAME Power Ends
• Back pull-out design for ease of maintenance
• Parts interchangeable with Goulds Model 3196
• External impeller adjustment
• ANSI B15.1 coupling guard
• Ductile iron frame adapter
• Fully serrated flanges

Priming Operation

The pump features a reliable self-priming operation with a one-piece casing designed with integral priming and air separation chambers. Priming is accomplished within the casing, eliminating the need for auxiliary priming systems. The casing design ensures an adequate volume of liquid for repriming is always retained, even if liquid drains back to the source.

Sealing Solutions

Goulds engineered seal chambers are designed to accept a wide range of sealing arrangements:

• Single Inside Seal (with BigBore™ Seal Chamber): For non-corrosive to moderate corrosive liquids, moderate abrasives, and liquids with good lubrication qualities.
• Conventional Double Seal (with BigBore™ Seal Chamber): For liquids not compatible with single seals, toxic, hazardous, abrasive, corrosive liquids, or when operating under cavitation or low flows, and to meet environmental regulations.
• Single Cartridge Seal (with TaperBore™ PLUS Seal Chamber): Similar applications to conventional single seals, with ease of maintenance and no seal setting problems.
• Double Cartridge Seal (with BigBore™ Seal Chamber): Similar applications to conventional double seals, with reduced maintenance costs and no seal setting errors.
• Double Gas Barrier Seal (with BigBore™ Seal Chamber for Gas Seals): For toxic or hazardous liquids, to meet environmental regulations, or when a seal pot/external flush is not desirable or a compatible seal flush liquid is unavailable.

Interchangeability

i-FRAME Power Ends are designed to fit seven different process pumps, including the Model 3196, Model CV 3196, Model HT 3196, Model LF 3196, Model 3198, Model 3796, and Model 3996.

Hydraulic Coverage

Performance curves are available for 3500 RPM (60 Hz) and 2850 RPM (50 Hz) operations, as well as for 1750 RPM (60 Hz) and 1450 RPM (50 Hz) operations. See the official PDF for exact tabulated values and performance curves.

Key Features

• Condition Monitor (Patent Pending): Continuously measures vibration and temperature at the thrust bearing. Colored LEDs indicate general pump health, providing early warning of improper operation.
• Continuous Performance: Original flow, pressure, and efficiency are maintained by simple external adjustment.
• INPRO VBXX-D Hybrid Labyrinth Seals: Prevents premature bearing failure caused by lubricant contamination or loss of oil. Features stainless steel rotors.
• Premium Severe-Duty Thrust Bearings: Increase bearing fatigue life by 2-5X compared to conventional bearing steels.
• Heavy Duty Shaft and Bearings: Rigid shaft designed for minimum deflection (less than 0.002 in. / 0.05 mm) at seal faces. Bearings sized for a 10-year average life under tough operating conditions. Available with or without shaft sleeve.
• Optimized Oil Sump Design: Increased oil capacity (10%-20% larger than ANSI pump average) provides better heat transfer for reduced oil temperature. Contaminants are directed away from bearings to a magnetic drain plug.
• One-Inch Bull’s Eye Sight Glass: Assures proper oil level and can be mounted on either side of the pump.
• Ductile Iron Frame Adapter: Material strength is equal to carbon steel for safety.
• Compact, One-Piece Casing Design: Eliminates the need for a separate priming chamber, air separator, or valves. Features self-venting, centerline discharge, and back pull-out design.
• Serrated Flanges: For positive sealing against leakage. Meets ANSI B16.5 requirements. Class 150 FF flanges are standard, with optional Class 150 RF.
• Fully Open Impeller: Acknowledged as the best design for CPI services, handling solids, stringy material, corrosives, and abrasives. Back pump-out vanes minimize seal chamber pressure.
• Optional Casing Drain
• Magnetic Drain Plug: Standard magnetic drain plug helps protect bearings and prolong life.
• i-FRAME Power End: Designed for reliability and extended pump life, backed with a 5-year warranty.

Materials of Construction

Key components and their material options include:

• Casing: Ductile Iron, 316SS, CD4MCu, Alloy 20, Hastelloy, Titanium
• Impeller: Ductile Iron, 316SS, CD4MCu, Alloy 20, Hastelloy, Titanium
• Shaft—Less Sleeve (Optional): SAE4140, 316SS, Alloy 20, Hastelloy, Titanium
• Shaft—With Sleeve: SAE4140, 316SS
• Shaft Sleeve: 316SS, Alloy 20, Hastelloy, Titanium
• Seal Chamber (Mechanical Seal): Ductile Iron, 316SS, CD4MCu, Alloy 20, Hastelloy, Titanium
• Frame Adapter: Ductile Iron
• Bearing Frame: Cast Iron (Ductile Iron for STi Group)
• Thrust Bearing: Double Row Angular Contact
• Radial Bearing: Single Row Deep Groove
• Oil Sight Glass: Glass/Steel
• INPRO ® VBXX-D Labyrinth Oil Seal: Stainless Steel/Bronze
• Casing Gasket: Aramid Fiber with EPDM Rubber
• Condition Monitor: Stainless Steel/Epoxy

Shaft Dimensions

• Diameter at Impeller: 0.75 in. (19 mm), 1 in. (25 mm), 1.25 in. (32 mm)
• Diameter in Stuffing Box/Seal Chamber (Less Sleeve): 1.375 in. (35 mm), 1.75 in. (45 mm), 2.125 in. (54 mm)
• Diameter in Stuffing Box/Seal Chamber (With Sleeve): 1.125 in. (29 mm), 1.5 in. (38 mm), 1.875 in. (48 mm)
• Diameter Between Bearings: 1.5 in. (38 mm), 2.125 in. (54 mm), 2.5 in. (64 mm)
• Diameter at Coupling: 0.875 in. (22 mm), 1.125 in. (29 mm), 1.875 in. (48 mm)
• Overhang: 6.125 in. (156 mm), 8.375 in. (213 mm), 8.375 in. (213 mm)
• Maximum Shaft Deflection: 0.002 in. (0.05 mm)

Sleeve Dimensions

• O.D. thru Stuffing Box/Seal Chamber: 1.375 in. (35 mm), 1.75 in. (45 mm), 2.125 in. (54 mm)

Bearings

• Radial Bearings: SKF 6207, SKF 6309, SKF 6311
• Thrust Bearings: SKF 5306 A/C3, SKF 5309 A/C3, SKF 7310 BECBM
• Bearing Span: 4.125 in. (105 mm), 6.75 in. (171 mm), 6.875 in. (164 mm)
• Average L'10 Bearing Life: 87,600 hours

Seal Chamber Dimensions

• BigBore™ Seal Chamber Bore: 2.875 in. (73 mm), 3.5 in. (89 mm), 3.875 in. (98 mm)
• Stuffing Box Bore: 2 in. (51 mm), 2.5 in. (64 mm), 2.875 in. (73 mm)

Bare Pump Dimensions and Weight

The following table provides dimensions (in inches and mm) and weights (in lbs and kg) for various pump sizes. See the official PDF for exact tabulated values.

Baseplate Mounting Options

Goulds offers a complete range of mounting systems:

• Camber Top Cast Iron: Rigid and corrosion resistant.
• CHEMBASE PLUS™: Polymer concrete construction providing exceptional rigidity and corrosion resistance. Meets ANSI 1991 dimensional.
• Fabricated Steel: Economical baseplate meeting ANSI/ASME B73.1 M current edition dimensional requirements.
• Enhanced Feature Fabricated Steel: Upgraded ANSI baseplate designed to maximize pump operation life and ease installation, meeting API-minded chemical pump users' toughest requirements.

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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 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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