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The Goulds 3642 series of close-coupled, end-suction, Centrifugal Pumps are designed for water circulation, booster service, liquid transfer, spraying systems, jockey pump service, and general purpose pumping. These pumps can be mounted in vertical or horizontal position. They are built with all iron, all bronze, or bronze fitted construction. Enclosed impellers come in multiple sizes. Models are available with a variety of power outputs, voltages, and NPT discharges. The 3500 RPM motor is close-coupled and available in single or three phases as open drip-proof, totally enclosed fan cooled, or explosion proof. For similar frame-mounted, pump-end only versions, look at Goulds’ 3742 Series. The compact, close coupled  design saves on space and allows for easy installation. Flexible couplings and bed plates are not required. The design also offers flexibility of installation driver arrangements. Cast iron power frames rigidly support the grease-for-life ball bearing shaft assembly. Impellers are balanced for smooth operation and threaded directly onto the motor shaft. The enclosed impeller design provides high efficiencies. Stainless steel lock nuts on three phase models require no clearance adjustment. Casings are volute type that are a back pull out design and are constructed of either cast iron or brass. Discharges can be rotated in eight positions. Vertical discharges come standard. Tapped openings are provided for priming, venting and draining. Mechanical seals come standard with carbon/ceramic faces, BUNA elastomers, and 300 series stainless steel components. Option seals are available. GOULDS 3642 SERIES CENTRIFUGAL PUMPS Model Comparison Chart Model Discharge (NPT) HP Voltage Phase Impeller Material 2BF10512 1-1/4" 1/2 115/230 1 Bronze Fitted 2BF40534 1-1/4" 1/2 208-230/460 3 Bronze Fitted 1BF10512 1" 1/2 115/230 1 Bronze Fitted 1AI10512 1" 1/2 115/230 1 Cast Iron 2BF10712 1-1/4" 3/4 115/230 1 Bronze Fitted 2AI10712 1-1/4" 3/4 115/230 1 Cast Iron 1BF10312 1" 1/3 115/230 1 Bronze Fitted 1BF40312 1" 1/3 115/230 1 Bronze Fitted 1AI10312 1" 1/3 115/230 1 Cast Iron 1AI40312 1" 1/3 115/230 1 Cast Iron 1AI40334 1" 1/3 208-230/460 3 Cast Iron 1BF10334 1" 1/3 208-230/460 3 Bronze Fitted 1BF40334 1" 1/3 208-230/460 3 Bronze Fitted 1AI10334 1" 1/3 208-230/460 3 Cast Iron 2BF10734 1-1/4" 3/4 208-230/460 3 Bronze Fitted 2AI10734 1-1/4" 3/4 208-230/460 3 Cast Iron 1BF10534 1" 1/2 208-230/460 3 Bronze Fitted 1AI10534 1" 1/2 208-230/460 3 Cast Iron 2AI10512 1-1/4" 1/2 115/230 1 Cast Iron 2AI40512 1-1/4" 1/2 115/230 1 Cast Iron 2BF11012 1-1/4" 1 115/230 1 Bronze Fitted 1AI10712 1" 3/4 115/230 1 Cast Iron 1BF10712 1" 3/4 115/230 1 Bronze Fitted 2AI40534 1-1/4" 1/2 208-230/460 3 Cast Iron 2BF50712 1-1/4" 3/4 115/230 1 Bronze Fitted 2BF20712 1-1/4" 3/4 115/230 1 Bronze Fitted 1AI11012 1" 1 115/230 1 Cast Iron 1BF11012 1" 1 115/230 1 Bronze Fitted 2AI10534 1-1/4" 1/2 208-230/460 3 Cast Iron 1BF20512 1" 1/2 115/230 1 Bronze Fitted 1AI20712 1" 3/4 115/230 1 Cast Iron 1AI50512 1" 1/2 115/230 1 Cast Iron 1BF20712 1" 3/4 115/230 1 Bronze Fitted 1AI20512 1" 1/2 115/230 1 Cast Iron 1BF50512 1" 1/2 115/230 1 Bronze Fitted 1AI11512 1" 1-1/2 115/230 1 Cast Iron 1BF11512 1" 1-1/2 115/230 1 Bronze Fitted 1BF21012 1" 1 115/230 1 Bronze Fitted 1AI21012 1" 1 115/230 1 Cast Iron 1AI20534 1" 1/2 208-230/460 3 Cast Iron 1BF50534 1" 1/2 208-230/460 3 Bronze Fitted 1BF20534 1" 1/2 208-230/460 3 Bronze Fitted 1AI50534 1" 1/2 208-230/460 3 Cast Iron 1BF10734 1" 3/4 208-230/460 3 Bronze Fitted 2BF10534 1-1/4" 1/2 208-230/460 3 Bronze Fitted 1AI10734 1" 3/4 208-230/460 3 Cast Iron 2BF21012 1-1/4" 1 115/230 1 Bronze Fitted 2AI50734 1-1/4" 3/4 208-230/460 3 Cast Iron 2AI20734 1-1/4" 3/4 208-230/460 3 Cast Iron 1AI11034 1" 1 208-230/460 3 Cast Iron 2BF11512 1-1/4" 1-1/2 115/230 1 Bronze Fitted 1BF11034 1" 1 208-230/460 3 Bronze Fitted 2AI50712 1-1/4" 3/4 115/230 1 Cast Iron 2AI20712 1-1/4" 3/4 115/230 1 Cast Iron 1BF20734 1" 3/4 208-230/460 3 Bronze Fitted 1AI20734 1" 3/4 208-230/460 3 Cast Iron 2AI21012 1-1/4" 1 115/230 1 Cast Iron 2AI11012 1-1/4" 1 115/230 1 Cast Iron 2BF11534 1-1/4" 1-1/2 208-230/460 3 Bronze Fitted 1AI11534 1" 1-1/2 208-230/460 3 Cast Iron 1BF11534 1" 1-1/2 208-230/460 3 Bronze Fitted 2BF21512 1-1/4" 1-1/2 115/230 1 Bronze Fitted 2BF20734 1-1/4" 3/4 208-230/460 3 Bronze Fitted 2AI11034 1-1/4" 1 208-230/460 3 Cast Iron 2AI11534 1-1/4" 1-1/2 208-230/460 3 Cast Iron 2BF11034 1-1/4" 1 208-230/460 3 Bronze Fitted 2BF81034 1-1/4" 1 208-230/460 3 Bronze Fitted 1AI81034 1" 1 208-230/460 3 Cast Iron 1BF81034 1" 1 208-230/460 3 Bronze Fitted 2AI11512 1-1/4" 1-1/2 115/230 1 Cast Iron 2BF50734 1-1/4" 3/4 208-230/460 3 Bronze Fitted 2AI82034 1-1/4" 2 208-230/460 3 Cast Iron 2BF12012 1-1/4" 2 115/230 1 Bronze Fitted 1AI21512 1" 1-1/2 115/230 1 Cast Iron 2BF22012 1-1/4" 2 115/230 1 Bronze Fitted 1BF21512 1" 1-1/2 115/230 1 Bronze Fitted 2AI21512 1-1/4" 1-1/2 115/230 1 Cast Iron 2BF12034 1-1/4" 2 208-230/460 3 Bronze Fitted 2AI12012 1-1/4" 2 115/230 1 Cast Iron 2AI81034 1-1/4" 1 208-230/460 3 Cast Iron 1AI81534 1" 1-1/2 208-230/460 3 Cast Iron 1BF81534 1" 1-1/2 208-230/460 3 Bronze Fitted 1BF82034 1" 2 208-230/460 3 Bronze Fitted 1AI82034 1" 2 208-230/460 3 Cast Iron 2BF82034 1-1/4" 2 208-230/460 3 Bronze Fitted 2AI12034 1-1/4" 2 208-230/460 3 Cast Iron 2AB40512 1-1/4" 1/2 115/230 1 All Bronze 2AI22012 1-1/4" 2 115/230 1 Cast Iron 2AB40534 1-1/4" 1/2 208-230/460 3 All Bronze 2AI81534 1-1/4" 1-1/2 208-230/460 3 Cast Iron 1AI22012 1" 2 115/230 1 Cast Iron 1BF22012 1" 2 115/230 1 Bronze Fitted 2BF81534 1-1/4" 1-1/2 208-230/460 3 Bronze Fitted 2AB50734 1-1/4" 3/4 208-230/460 3 All Bronze 2AB50712 1-1/4" 3/4 115/230 1 All Bronze 1BF30534 1" 1/2 230/460 3 Bronze Fitted 1AI60534 1" 1/2 230/460 3 Cast Iron 1AI30534 1" 1/2 230/460 3 Cast Iron 1BF60534 1" 1/2 230/460 3 Bronze Fitted 1BF60512 1" 1/2 115/230 1 Bronze Fitted 1AI30734 1" 3/4 230/460 3 Cast Iron 1BF30734 1" 3/4 230/460 3 Bronze Fitted 2BF30734 1-1/4" 3/4 230/460 3 Bronze Fitted 1AI91034 1" 1 230/460 3 Cast Iron 2AI30734 1-1/4" 3/4 230/460 3 Cast Iron 2AI60734 1-1/4" 3/4 230/460 3 Cast Iron 2BF60734 1-1/4" 3/4 230/460 3 Bronze Fitted 1AB40312 1" 1/3 115/230 1 All Bronze 1AB10312 1" 1/3 115/230 1 All Bronze 1BF31512 1" 1-1/2 115/230 1 Bronze Fitted 1BF32012 1" 2 115/230 1 Bronze Fitted 1AB21512 1" 1-1/2 115/230 1 All Bronze 1AB10512 1" 1/2 115/230 1 All Bronze 1AI91534 1" 1-1/2 230/460 3 Cast Iron 1AB10534 1" 1/2 208-230/460 3 All Bronze 1AB11534 1" 1-1/2 208-230/460 3 All Bronze 1AB10334 1" 1/3 208-230/460 3 All Bronze 1AB40334 1" 1/3 208-230/460 3 All Bronze 1AB10712 1" 3/4 115/230 1 All Bronze 1AB50534 1" 1/2 208-230/460 3 All Bronze 1AB20534 1" 1/2 208-230/460 3 All Bronze 1AB10734 1" 3/4 208-230/460 3 All Bronze 1AB20512 1" 1/2 115/230 1 All Bronze 1AB11034 1" 1 208-230/460 3 All Bronze 2AB10512 1-1/4" 1/2 115/230 1 All Bronze 2AB10534 1-1/4" 1/2 208-230/460 3 All Bronze 1AB11012 1" 1 115/230 1 All Bronze 1BF91034 1" 1 230/460 3 Bronze Fitted 1AB11512 1" 1-1/2 115/230 1 All Bronze 1AB21012 1" 1 115/230 1 All Bronze 1AB20712 1" 3/4 115/230 1 All Bronze 1AB20734 1" 3/4 208-230/460 3 All Bronze 1BF91534 1" 1-1/2 230/460 3 Bronze Fitted 2BF91034 1-1/4" 1 230/460 3 Bronze Fitted 2AB10712 1-1/4" 3/4 115/230 1 All Bronze 2AB10734 1-1/4" 3/4 208-230/460 3 All Bronze 2AB11034 1-1/4" 1 208-230/460 3 All Bronze 2AI91034 1-1/4" 1 230/460 3 Cast Iron 2AB11534 1-1/4" 1-1/2 208-230/460 3 All Bronze 1AB81034 1" 1 208-230/460 3 All Bronze 1AB22012 1" 2 115/230 1 All Bronze 1AB81534 1" 1-1/2 208-230/460 3 All Bronze 2AB20734 1-1/4" 3/4 208-230/460 3 All Bronze 2AB20712 1-1/4" 3/4 115/230 1 All Bronze 2AB11012 1-1/4" 1 115/230 1 All Bronze 2AI91534 1-1/4" 1-1/2 230/460 3 Cast Iron 2AB12034 1-1/4" 2 208-230/460 3 All Bronze 1BF92034 1" 2 230/460 3 Bronze Fitted 2AB21012 1-1/4" 1 115/230 1 All Bronze 1AI92034 1" 2 230/460 3 Cast Iron 2AB11512 1-1/4" 1-1/2 115/230 1 All Bronze 2AB82034 1-1/4" 2 208-230/460 3 All Bronze 2AB81034 1-1/4" 1 208-230/460 3 All Bronze 1AB30534 1" 1/2 230/460 3 All Bronze 1AB60534 1" 1/2 230/460 3 All Bronze 2AB81534 1-1/4" 1-1/2 208-230/460 3 All Bronze 2AB21512 1-1/4" 1-1/2 115/230 1 All Bronze 1AB82034 1" 2 208-230/460 3 All Bronze 2BF92034 1-1/4" 2 230/460 3 Bronze Fitted 2BF91534 1-1/4" 1-1/2 230/460 3 Bronze Fitted 2AB12012 1-1/4" 2 115/230 1 All Bronze 2AI92034 1-1/4" 2 230/460 3 Cast Iron 1AB30734 1" 3/4 230/460 3 All Bronze 2AB60734 1-1/4" 3/4 230/460 3 All Bronze 2AB30734 1-1/4" 3/4 230/460 3 All Bronze 2AB22012 1-1/4" 2 115/230 1 All Bronze 1AB91034 1" 1 230/460 3 All Bronze 2AB91034 1-1/4" 1 230/460 3 All Bronze 2AB91534 1-1/4" 1-1/2 230/460 3 All Bronze 1AB92034 1" 2 230/460 3 All Bronze 1AB91534 1" 1-1/2 230/460 3 All Bronze 2AB92034 1-1/4" 2 230/460 3 All Bronze PERFORMANCE CURVES REPAIR PARTS WEIGHTS AND DIMENSIONS OPTIONAL MECHANICAL SEALS BROCHURE Goulds 3642 Series Centrifugal Pump Brochure INSTALLATION MANUAL Goulds 3642 Series Centrifugal Pump Installation Manual REPAIR PARTS Goulds 3642 Series Centrifugal Pump Repair Parts Pump Products application engineers are standing by to help you find the right pump, as well as to provide price quotes, stocking availability and shipping information. 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