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Bronze Gear Pumps

Reliable in Harsh Conditions

Our bronze gear pumps are the ideal solution for corrosive or chemically sensitive liquids. Thanks to the properties of bronze, they provide reliability and safety. These pumps are built with high-quality bronze housings and helical gears. Shafts are made of stainless steel. Available with either bronze bearings and grease fittings or self-lubricating carbon bearings. Dynamic sealing options include packing, lip seals, or mechanical seals depending on application needs. Static O-ring cover seals eliminate issues common with traditional gaskets. 

Key Features: 

  • Corrosion-resistant bronze castings and gears 

  • Stainless steel shafts and fasteners 

  • Heavy-duty carbon bearings (self-lubricating) 

  • Positive displacement flow 

Designed to handle both lubricating and non-lubricating fluids with pH from 4 to 11, and temperatures up to 400°F (204°C). Suitable for highly viscous fluids up to 100,000 cP (462,000 SSU). Flow rates up to 175 GPM (662 LPM), differential pressures up to 150 psi (10.3 bar), and suction lift capabilities up to 20 feet (6.1 meters). 

Discover Our Range of Bronze Gear Pumps

Close Coupled

The motor and pump are directly coupled, without an intermediate shaft or external bearing. Compact design, often used where space saving is important. 

Technical Specification:

  • Flows up to 60 GPM  (227 LPM) 

  • Pressures to 150 PSIG  (10.3 bar) 

  • Bronze & SST Wetted Components 

  • Carbon Bearings, Self-Lub 

  • Up to 1 ½” (38mm) in size 

  • Motor Options Available 

Pedestal

Pump mounted on a so-called bearing base (pedestal), which requires connection to the engine via a shaft and clutch. Typical in industrial applications, where the rigidity of the system and the possibility of servicing the drive elements separately are important. 

Technical Specification:

  • Flow 0 to 170 GPM  (643 LPM) 

  • Pressure 0 to 150 PSIG  (10.3 bar) 

  • Up to 2” (51mm) in size 

  • Bronze Corrosion Resistant Casting 

  • Stainless Steel Shafts & Fasteners 

  • Heavy Duty Carbon Bearings (self-lub) 

  • Optional Lip Seals & Mechanical Seals 

  • Multiple Options on Motor Drives 

Carbonator

This type of gear pump is used in the food industry, especially in the production of carbonated drinks (hence the name "carbonator"). Often made of stainless steel, designed to circulate liquids under pressure. 

Technical Specification:

  • Flows to 4 GPM (15 LPM) 

  • Pressures to 150 PSIG (10.3 bar) 

  • Port Sizes to 3/8” (9.5 mm) 

  • Bronze Body & Bronze Spur Gears 

  • Self-lubricating Carbon Bearings 

  • Buna N Lip Seal & Mechanical Seal available 

  • Uses a circular clamp, similar to a hose clamp, as means of attaching the pump to a machined hub on a Carbonator motor.  

  • Advantages are compactness and economy due to the elimination of the adapter casting 

Simplify Your Pump Selection Process

Our Oberdorfer Pump Selection Chart makes it simple to compare models, flow rates, pressure capabilities, and power requirements under different operating conditions. This helpful tool will guide you in choosing the right pump for your specific application.

Oberdorfer Pump Selection Chart

Our Range of Bronze Gear Pumps