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Oberdorfer

Oberdorfer Pumps has been manufacturing high-quality, dependable\npumps for over 100 years. We manufacture gear pumps, centrifugal\npumps, rubber impeller pumps, progressive cavity pumps, and roller\npumps. Positive displacement BRONZE gear pumps. Little flow\ndecrease with pump pressure increase. Flow increases with speed\nincrease. Flow from 1-175 GPM (3 - 662 LPM)and pressures from 0-150\nPSI (0 - 10.3 BAR). Pump housings and gears are made of top quality\nbronze, shafts are 303 stainless steel. Bearings are designed of\nhigh performance carbon-graphite material selected for wear\nresistance and long service life. Gear pumps are positive\ndisplacement pumps. Each shaft revolution displaces a definite\namount of liquid relatively unaffected by the back pressure in the\ndischarge line. Shaft speed and flow are directly proportional.\nRecommended pressure limits are 50 PSI for water and\nnon-lubricants, 75 PSI for oil and other lubricants.The maximum\nshaft speed is 1725 RPM. As a general rule, the suction lift should\nbe kept at an absolute minimum by placing the pump as close to the\nliquid source as possible. A gear pump in new conditioncan lift 20\nfeet of water in the suction line. A foot valve (preferably with\nbuilt-instrainer) is recommended at the beginning of the suction\nline. For a first start-up, thepump should be primed to avoid dry\nrunning. Minimum size of the suction pipe is thesize of the pump\ninlet port. For longer suction lines (over 3 feet) or for\nviscousliquids, the pipe should be at least one size or two sizes\nlarger than the pump inletport.\n\n

Oberdorfer

  • N Oberdorfer Gear Pumps Bronze

    Oberdorfer Bronze Gear pumps Pump housings and gears are made of top quality bronze, shafts are from stainless steel 303. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of l9iquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100 psi for water and non-lubricants, 150 psi for oil and lubricants. Maximum shaft speed is 1750 rpm. A relief valve is necessary in the system if the discharge line contains any throttling devices, such as a shut-off valve, a spray nozzle or other restrictive device. This will return the liquid to the suction side or to the tank. The relief valve is also available as part of the pump itself (R-model pumps). However, built-in relief valves are only good for intermittent service. A built-in relief valve is strictly a safety device against overpressure. It will not work successfully as a pressure or flow control device. For this purpose a separate relief valve in the pressure line must be used. Service life will be increase substantially if the liquid pumped is clean and has a lubricity value. These pumps have extremely close tolerances. Fine abrasives like sand, silt, or powder in suspension will destroy pumping ability. Liquids compatible with bronze, stainless steel and the acrylic graphite packing can be pumped. Solvent resistant packings and Teflon® packings are also available. Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow temperature range of _40F to 400F. The acrylic graphite packing is rated to 500F. Freezing liquid in the pump can deform or damage the pump. Viscous liquids such as molasses or oils require a lower pumping speed, in extreme cases as low ass 200 R.P.M. Liquids with specific gravities heavier than water such as dry cleaning fluids require an increase in motor horsepower directly proportional to the increase in specific gravity over water. A rotary gear pump is capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self-priming, a foot valve is recommended. For pumping water directly from streams or ponds, a wire mesh strainer must be used at the beginning of the suction line to prevent stones from entering the pump. Strainer and foot valve are commercially available as combination units. NOTE: For the individual pump performance curves and dimensional drawings, please select a model from below. Used for vegetable oil, biodiesel.

  • N970 Oberdorfer Bronze gear pump 3/4

    Oberdorfer Close coupled 3/4" bronze rotary gear pumps. Available as pump end only PEO or coupled to a NEMA standard frame motor. Pump housings and gears are made of top quality bronze, shafts are from stainless steel 303. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps by Oberdorfer are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100 psi for water and non-lubricants, 150 psi for oil and lubricants. Maximum shaft speed is 1750 rpm. A relief valve is necessary in the system if the discharge line contains any throttling devices, such as a shut-off valve, a spray nozzle or other restrictive device. This will return the liquid to the suction side or to the tank. The relief valve is also available as part of the pump itself (R-model pumps). However, built-in relief valves are only good for intermittent service. If used continuously, the pump will over heat. A built-in relief valve is strictly a safety device against overpressure. It will not work successfully as a pressure or flow control device. For this purpose a separate relief valve in the pressure line must be used. Service life will be increase substantially if the liquid pumped is clean and has a lubricity value. These pumps have extremely close tolerances. Fine abrasives like sand, silt, or powder in suspension will destroy pumping ability. Liquids compatible with bronze, stainless steel and the graphite bushing can be pumped. Solvent resistant packings and Teflon® packings are also available. Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow temperature range of _40F to 400F. The acrylic graphite packing is rated to 500F. Freezing liquid in the pump can deform or damage the pump. Viscous liquids such as molasses or oils require a lower pumping speed, in extreme cases as low ass 200 R.P.M. Liquids with specific gravities heavier than wate such as dry cleaning fluids require an increase in motor horsepower directly proportional to the increase in specific gravity over water. A rotary gear pump is capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self-priming, a foot valve is recommended. For pumping water directly from streams or ponds, a wire mesh strainer must be used at the beginning of the suction line to prevent stones from entering the pump. Strainer and foot valve are commercially available as combination units. Often used in Diesel transfer.

  • N999 Bronze Gear pumps

    Bronze gear pumps with or without electric motors. Pump housings and gears are made of top quality bronze, shafts are 303stainless steel. Bearings are designed of high performance carbon-graphite materialselected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displacesa definite amount of liquid relatively unaffected by the back pressure in thedischarge line. Shaft speed and flow are directly proportional. Recommended pressurelimits are 100 PSI for water and non-lubricants, 150 PSI for oil and other lubricants.The maximum shaft speed is 1750 RPM. Features N999 Series: Compact design eases installation and use in limited space areas. Construction is bronze and stainless steel wetted components. Close tolerance design allows for consistent performance Helical gears for quiet operation. Pump housings and gears are made of top quality bronze, shafts are 303 SS. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100PSI for water and non-lubricants, 150PSI for oil and other lubricants. The maximum shaft speed is 1750 RPM. Close coupled gear pumps are normally supplied with a Buna N lip seal. A lip seal made of Viton(R) is available as an option. For a Viton(R) Seal, add S5 to the pump model number. These pumps are suitable for all liquids that are compatible with bronze. Most common liquids are water, oil, and mild chemicals in the pH range of 4 to 11. Liquids containing solids, abrasives, powders, or paint pigments are definitely not recommended for gear pumps.

  • N26 2 Gear Pump

    Pedistal Rotary Bronze Gear pumps. Design features an outboard ball bearing support for belt drive applications. Self lubricating carbon bearings. Pressures to 140 PSI.

  • Bronze Rotary Gear Pumps

    This Bronze Rotary Gear Pump is popular among OEM users. It is a diesel fuel transfer and heli-arc welding cooling pump featuring an all bronze design and 303 stainless steel shafts with options of non-metallic gears and a variety of shaft seals. Special Features: Bronze Body Helical Gears for Quiet Operation Self-lubricating Carbon Bearings Buna N Lip Seal Carbonator Motor Mount Bronze pumps are suitable for water, oil, and mild chemicals in the pH-range from 4-10. Viscous liquids may be handled with carbonator motors up to a viscosity of 300 SSU. Liquids containing abrasives, solids, powders or pigments are highly detrimental to pump life and mut be avoided.   Tramont, Onan, Cummins

  • N990 Close Coupled Bronze Rotary Gear Pumps

    Oberdorfer Bronze gear pump. Close coupled bronze rotary gear pumps. Available as pump end only PEO or coupled to a NEMA standard frame motor. Pump housings and gears are made of top quality bronze, shafts are from stainless steel 303. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100 psi for water and non-lubricants, 150 psi for oil and lubricants. Maximum shaft speed is 1750 rpm. A relief valve is necessary in the system if the discharge line contains any throttling devices, such as a shut-off valve, a spray nozzle or other restrictive device. This will return the liquid to the suction side or to the tank. The relief valve is also available as part of the pump itself (R-model pumps). However, built-in relief valves are only good for intermittent service. If used continuously, the pump will over heat. A built-in relief valve is strictly a safety device against overpressure. It will not work successfully as a pressure or flow control device. For this purpose a separate relief valve in the pressure line must be used. Service life will be increase substantially if the liquid pumped is clean and has a lubricity value. These pumps have extremely close tolerances. Fine abrasives like sand, silt, or powder in suspension will destroy pumping ability. Liquids compatible with bronze, stainless steel and the graphite bushing can be pumped. Solvent resistant packings and Teflon® packings are also available. Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow temperature range of 40F to 400F. The acrylic graphite packing is rated to 500F. Freezing liquid in the pump can deform or damage the pump. Viscous liquids such as molasses or oils require a lower pumping speed, in extreme cases as low ass 200 R.P.M. Liquids with specific gravities heavier than wate such as dry cleaning fluids require an increase in motor horsepower directly proportional to the increase in specific gravity over water. A rotary gear pump is capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self-priming, a foot valve is recommended. For pumping water directly from streams or ponds, a wire mesh strainer must be used at the beginning of the suction line to prevent stones from entering the pump. Strainer and foot valve are commercially available as combination units.

  • SM103 Magnetic Drive

    Designed to handle highly corrosive liquids that must be pumped under pressure. The Chemsteel pump prevents system contamination while maintaining the purity and integrety of the liquid being pumped. Key attributes include: Slotted bearings to lubricate shaft and gear surfaces. Hydraulic porting to balance axial thrust and to reduce wear. Ample port sizing to redice the likelihood of cavitation when inlet pressure is marginal. Effective housing seals with elastic memory prevent leakage of corrosives. Recirculation heat port versatility. Containment can flush and drain connections.

  • ChemSteel Chemical Gear pump

    Chemsteel chemical pumps are designed to handle common and higly corrosive liquids that mustbe put under pressure. The Chemsteel pump line prevents system contamination while maintaining the purity and integrity of the chemical liquid being pumped. Helical gearing offers noise reduction by as much as 10db, while the tandem pumps double the output flow for a single fluid, or with isolation, handle other fluids in direct ratio to the first. Gear/bearing design allows for "trimming" for optimizing the pump's maximum flow to reach minimum turndown or to match flow to a specific requirement.Connections are 1/4" -1/2" female NPT or BSPT, pump hardware is SS and close couple adapters mount to both NEMA and IEC standard motor frame sizes for world wide acceptance. For chemical pump types centrifugal, magnetic coupled or mechanical sealed, look under the "centrifugal pumps" catagory.

  • 300B Marine AC Water Bronze Pumps

    Oberdorfer Marine pump, Aluminum or Bronze self-priming mechanical sealed pump. Available with or without motor and Pedistal mounted. Used on many OEM marine AC units. Bronze models - Ideal for marine service ( air conditioning, bilge, and sea water recirculating).

  • N991 Bronze Gear Pump

    Oberdorfer Pumps has been manufacturing high-quality, dependable pumps for over 100 years. We manufacture gear pumps, centrifugal pumps, rubber impeller pumps, progressive cavity pumps, and roller pumps. Positive displacement BRONZE gear pumps. Little flow decrease with pump pressure increase. Flow increases with speed increase. Flow from 1-175 GPM (3 - 662 LPM)and pressures from 0-150 PSI (0 - 10.3 BAR). Pump housings and gears are made of top quality bronze, shafts are 303 stainless steel. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 50 PSI for water and non-lubricants, 75 PSI for oil and other lubricants.The maximum shaft speed is 1725 RPM. As a general rule, the suction lift should be kept at an absolute minimum by placing the pump as close to the liquid source as possible. A gear pump in new conditioncan lift 20 feet of water in the suction line. A foot valve (preferably with built-instrainer) is recommended at the beginning of the suction line. For a first start-up, thepump should be primed to avoid dry running. Minimum size of the suction pipe is thesize of the pump inlet port. For longer suction lines (over 3 feet) or for viscousliquids, the pipe should be at least one size or two sizes larger than the pump inletport.

  • Bronze Centrifugal

    Bronze Centrifugal pumps with moderately high pressure. Model 70P used in concrete cutting flat saws like Husqvarna, Diamond Boart, Norton and STW. Coolant to blades for floors, driveways, highways, streets, runways, new and old concrete and asphalt sawing cutting.

  • Bronze Centrifugal Pumps

    Bronze Centrifugal Pumps, Close coupled . The impeller is attached directly to the motor shaft, the seal is a top quality face type mechanical seal. These pumps can handle small impurities in the liquid and the discharge line may be throttled without the need for a relief valve. Flow: 1-100 GPM (3 - 380 LPM) Pressure: 0-60 PSI (0-4.1 BAR) Performance: Flow drops to zero with maximum pressure output. Suction Lift (Water): Zero for straight centrifugal. 15 ft. with foot valve (4.6 meters) Self-priming models to 20 ft. (6.1 meters) Liquid Cleanliness and Viscostiy: Clean or contaminated. Cannot pump viscous liquids above 2000 SSU. Liquid Compatibility: Most common liquids. Noise: Extremely quiet. Power Required: Least amount to start and operate; maximum amount at wide open flow and zero pressure; power demand decreases with pressure increase. Discharge Line: May shut off for extended time periods. Bearing Lubrication Required: No Temperature: -40 degrees F. to 250 degrees F. ( -40 degrees C to 122 degrees C)

  • N992 Gear Pumps

    N992 Gear Pumps. Bronze gear pumps made in the USA

  • Sewage Transfer Macerator

    Sewage Transfer Macerator. Rubber impeller, portable, bronze pump & motor. For water-like applications.

  • N1100 Bronze Gear pump CC 1.25

    Close coupled 1 1/4" bronze rotary gear pumps. Available as pump end only PEO or coupled to a NEMA standard frame motor. Pump housings and gears are made of top quality bronze, shafts are from stainless steel 303. Bearings are designed of high performance carbon-graphite material selected for wear resistance and long service life. Gear pumps are positive displacement pumps. Each shaft revolution displaces a definite amount of liquid relatively unaffected by the back pressure in the discharge line. Shaft speed and flow are directly proportional. Recommended pressure limits are 100 psi for water and non-lubricants, 150 psi for oil and lubricants. Maximum shaft speed is 1750 rpm. A relief valve is necessary in the system if the discharge line contains any throttling devices, such as a shut-off valve, a spray nozzle or other restrictive device. This will return the liquid to the suction side or to the tank. The relief valve is also available as part of the pump itself (R-model pumps). However, built-in relief valves are only good for intermittent service. If used continuously, the pump will over heat. A built-in relief valve is strictly a safety device against overpressure. It will not work successfully as a pressure or flow control device. For this purpose a separate relief valve in the pressure line must be used. Service life will be increase substantially if the liquid pumped is clean and has a lubricity value. These pumps have extremely close tolerances. Fine abrasives like sand, silt, or powder in suspension will destroy pumping ability. Liquids compatible with bronze, stainless steel and the graphite bushing can be pumped. Solvent resistant packings and Teflon® packings are also available. Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow temperature range of _40F to 400F. The acrylic graphite packing is rated to 500F. Freezing liquid in the pump can deform or damage the pump. Viscous liquids such as molasses or oils require a lower pumping speed, in extreme cases as low ass 200 R.P.M. Liquids with specific gravities heavier than wate such as dry cleaning fluids require an increase in motor horsepower directly proportional to the increase in specific gravity over water. A rotary gear pump is capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self-priming, a foot valve is recommended. For pumping water directly from streams or ponds, a wire mesh strainer must be used at the beginning of the suction line to prevent stones from entering the pump. Strainer and foot valve are commercially available as combination units. Often used in Diesel transfer.

  • GearIron Gear Pump

    GearIron®Cast Iron positive displacement helical gear pumps, General Duty series G, H is Heavy duty. Flow: 0-35 GPM (0-132.5 LPM) - Pressure: 0-500. Not for propane. PSI (0 - 34.5 BAR) Performance:Positive displacement. Little flow decrease with pump pressure increase. Flow increases with speed increase. Power: Power demand increases with speed and pressure. Suction Lift (water): 0-20 ft. below pump level (0 - 6.1meters) Liquid Cleanliness and Viscosity: Close tolerances require clean liquids. Viscous liquids require lower pump speeds. Liquid Compatibility: Petroleum products, solvents and fuel oils, soaps, coal tar, asphalt, sealers, resins,non-corrosive liquids, liquid propane. Noise: Helical gear design quiet. Discharge Line: Relief valve necessary if flow is shut off. Temperature: -40 degrees F. to 250 degrees F. (-40degrees C to 122 degrees C) Seal Arrangement: Mechanical or packing Type: Close coupled & Pedestal For a description of the various seal arrangements, and bearing selection table click "Outline Drawing" link. The individual pump model pages have the actual "Dimensional Drawing". The Performance curve link here is a chart for all the pump sizes. On the individual pump model pages they contain the flow curve for that size. Roper® Tuthill® Viking®

  • N9000 Pedestal Bronze Rotary Gear Pumps

    Oberdorfer Pedestal Bronze Rotary Gear Pump. Often used as an oil pump on large ships to pre-lube the bearings, honey production systems. Pump flow is reversible. Bronze Corrosion Resistant Castings Model #'s with E have BSPT Special Cast Bronze Gears Stainless Steel Shafts & Fasteners Formed Ring Seal Packing (Lip & Mechanical Seals on Special Order) Heavy Duty Carbon Bearings (Self Lubricating) Carbon or Bronze (model #'s with L have bronze bearings) Positive Displacement Flow Pumps with relief valve have a R in the model number Drive: Either direct drive with flexible coupling or pulley drive can be used. Make sure both flexible coupling halves are properly aligned. When using a pulley, do not overtighten the belt. Also, to absorb belt side thrust at higher pressures and larger size pumps, an external ball bearing support is recommended. Suction Lift: Close tolerances and the positive pumping action make the rotary gear pump capable of lifting water on the suction side as high as 20 feet. Though gear pumps are self priming, a foot valve is recommended. If possible, wet the gears with liquid to be pumped for the first dry start. Liquid retained in the system and gear chambers serves to “wet†the pump on subsequent starts. Liquids and Temperature: Service life will be increased substantially if the liquid pumped is clean and has some degree of lubricity. These positive displacement pumps have tight tolerances. Fine abrasives like sand, silt, or powders in suspension will accelerate pump wear and reduce throughput. Liquids compatible with bronze and stainless steel can be pumped providing proper seal has been specified (see chemical compatibility or check factory). When possible, flush the pump after each usage. Temperature extremes are detrimental to service life and should be avoided. Basic metals of construction allow a temperature range of -40 to 400F. Some lip and mechanical seal elastomers have a limit of 212oF. (see engineering data or check factory). Allowing a liquid to freeze in the pump can cause damage. By-Pass and Rotation: The pump by-pass is not intended to be a metering or flow control device. Its main purpose is to function as a pressure relief when the desired set point is exceeded, overheating can occur within 5 -10 minutes if the discharge line is completely shut off for extended periods. Reversing rotation reverses the “IN†and “OUT†ports and the location of the by-pass ports have to be reversed. The by-pass valve is factory set at 50 p.s.i. To increase the setpoint, turn the by-pass valve adjusting screw in a clockwise direction. Pumps with relief valve have a R in the model #. Relief valve factory set at 50 PSI. Pump is bi-rotational or reversible. Reversing the rotation reverses the In Outlet ports and the location of the by-pass port has to be reversed.

  • Carpet Cleaner Pump

    High Pressure Centrifugal pump used in carpet cleaners, dispenser-display and pressure washer applications. Nylon pump head, Ryton impeller. Double -insulated motor (non-replaceable brushes last 500-1000 hours). By-pass adapter included. 24" lead wires. when ordering please specify body orientation (click here for more info) - 4th and 5th digit of the model number relate to body orientation- For pressure washers, gas powered click here.