Goulds BF 3642 / 3742 Closed-Coupled Centrifugal Pumps

Summary

Product identification

The Goulds Pumps 3642/3742 series consists of close-coupled and frame-mounted centrifugal pumps.

The product code number on the pump label identifies various versions.

Close-Coupled (3500 RPM) Example Product Code: 1BF11512

• Pump Size:
  • 1 = 1 x 1¼ – 5
  • 2 = 1¼ x 1½ – 5
• Material:
  • BF = Bronze Fitted
  • AI = All Iron
  • AB = All Bronze
• Motor Type:
  • 1 = ODP
  • 2 = TEFC
  • 3 = XP
  • 4 = ODP with min. impeller
  • 5 = TEFC with min. impeller
  • 6 = EXP with min. impeller
• HP:
  • 03 = 1/3 HP
  • 05 = ½ HP
  • 07 = ¾ HP
  • 10 = 1 HP
  • 15 = 1½ HP
  • 20 = 2 HP
• Phase: 1 or 3
• Voltage:
  • 1 = 115
  • 2 = 115/230
  • 3 = 230
  • 4 = 208-230/460
  • 5 = 230/460
  • 6 = 190/380
  • 7 = 575 (Note: 575 Volt motors have an extended lead time.)
• Optional Seal:
  • Blank = Standard 10K10
  • N = Ni-Resist 10K6
  • O = EPR 10K18
  • V = Viton 10K55

Frame-Mounted Pumps Only Example Product Code: F1BF05

• F = Frame Mounted - Grease, Lube
• Pump Size:
  • 1 = 1 x 1¼ – 5
  • 2 = 1¼ x 1½ – 5
• Material:
  • BF = Bronze Fitted
  • AI = All Iron
  • AB = All Bronze
• HP:
  • 03 = 1/3 HP
  • 05 = ½ HP
  • 07 = ¾ HP
  • 10 = 1 HP
  • 15 = 1½ HP
  • 20 = 2 HP
• Optional Seal:
  • Blank = Standard
  • N = Ni-Resist
  • O = EPR
  • V = Viton

Operating limits

• Maximum working pressure: 125 PSI
• Temperature:
  • Standard seal: 212°F (100°C) maximum
  • Optional high temperature seal: 250°F (121°C) maximum
• Rotation: Right hand (clockwise when viewed from motor end)
• Operation: Not recommended for operation beyond printed H-Q curve. For critical application conditions, consult factory.

Electrical

• Motor Type: NEMA standard, 60 Hz, 3500 RPM.
• Enclosures: Open drip proof (ODP), TEFC, or explosion proof (three phase only).
• Shaft: Stainless steel.
• Single Phase Motors:
  • ½-2 HP ODP or TEFC.
  • Built-in overload with automatic reset.
• Three Phase Motors:
  • 1⁄3 - 2 HP: ODP, 208-230/460 V
  • ½ - 2 HP: TEFC, 208-230/460 V
  • ½ - 2 HP: explosion proof, 230/460 V
• Motor Frames:
  • NEMA 56J frame motors are used on close-coupled 3642 pumps.
  • T-frame motors are used on frame-mounted 3742 pumps.
• Overload Protection: Must be provided in starter unit. Starter and heaters (3) must be ordered separately.

Mechanical / hydraulic

• Design: Close-coupled (3642) and frame-mounted (3742) centrifugal pumps.
• Mounting: Can be mounted in vertical or horizontal position.
• Construction: Available in bronze fitted (BF), all iron (AI), or all bronze (AB). Bronze fitted means bronze impeller.
• Impeller: Enclosed design for high efficiencies. Threaded directly on motor shaft. Stainless steel locknut on three phase models requires no clearance adjustments. Balanced for smooth operation.
• Casing: Volute type, cast iron or brass construction. Back pullout design. Discharge can be rotated in eight positions; vertical discharge standard. Tapped openings provided for priming, venting, and draining.
• Mechanical Seal (Standard): Carbon/ceramic faces, BUNA elastomers, 300 series stainless steel components.
• Optional Mechanical Seals:
  • 10K10 (Standard Duty): Ceramic rotary, Ceramic stationary, BUNA elastomer, 316 SS metal parts.
  • 10K6 (Fluctuating Temp up to 212°F): Carbon rotary, Ni-Resistant stationary, BUNA elastomer, 18-8 SS metal parts.
  • 10K18 (Hot Water up to 250°F): Carbon rotary, Sil-Carbide stationary, EPR elastomer, 316 SS metal parts.
  • 10K55 (Mild Chemical): Carbon rotary, Ceramic stationary, Viton elastomer, 316 SS metal parts.
  • Note: The 10K55 seal has a 150 PSI rating, but the pump’s maximum working pressure is 125 PSI.
• Capacities: To 110 GPM
• Heads: To 118 feet
• Pipe Connections (NPT):
  • Model 1 x 1¼ - 5: Suction 1¼", Discharge 1"
  • Model 1¼ x 1½ - 5: Suction 1½", Discharge 1¼"
• Impeller Diameters (3500 RPM):
  • Size 1 x 1¼ - 5:
    • 1½ HP ODP or 2 HP TEFC: 5⅜" DIA.
    • 1 HP ODP or 1½ HP TEFC: 5⅛" DIA.
    • ¾ HP ODP or 1 HP TEFC: 4⁹⁄₁₆" DIA.
    • ½ HP ODP or ¾ HP TEFC: 3⅞" DIA.
    • ⅓ HP ODP or ½ HP TEFC: 3⁹⁄₁₆" DIA.
    • Optional Trimmed Impeller: 3³⁄₁₆" DIA.
  • Size 1¼ x 1½ - 5:
    • 2 HP ODP: 5" DIA.
    • 1½ HP ODP or 2 HP TEFC: 4⅜" DIA.
    • 1 HP ODP or 1½ HP TEFC: 3⅞" DIA.
    • ¾ HP ODP or 1 HP TEFC: 3⅝" DIA.
    • ½ HP ODP or ¾ HP TEFC: 3⅛" DIA.
    • Optional Trimmed Impeller: 2⅞" DIA.
• Materials of Construction:
  • Casing (Item 100): Cast iron ASTM A48 CL 20 (1001) or Bronze ASTM B584, C87500 Lead-Free (1101).
  • Impeller (Item 101): Bronze ASTM B584, C87500 Lead-Free (1101) or Cast iron ASTM A48 CL 20 (1001).
  • Adapter (Item 108): Cast iron ASTM A48 CL 20 (1001) or Bronze ASTM B584, C87500 Lead-Free (1101).
  • Impeller nut (Item 304): Stainless steel (close-coupled, three phase only) or AISI 416 SS (frame-mounted).
  • Shaft (Item 122, frame-mounted): AISI 303 SS.
  • Other components include materials such as Rubber, Micarta®, Steel, Composite, Brass, Zinc-Plated Steel, BUNA/Steel, and Plated Steel.
• Dimensions and Weights: See the official PDF for exact tabulated values.

Applications

Specifically designed for the following uses:

• Water circulation
• Booster service
• Liquid transfer
• Spraying systems
• Jockey pump service
• General purpose pumping

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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 original OEM PDF datasheet. Contractual data must always match the specific OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror