Oberdorfer N4000R-S3 Bronze Pedestal Gear Pump with Buna Seal 10 GPM
The Oberdorfer N4000R-S3 is a robust bronze pedestal gear pump engineered for reliable positive displacement fluid transfer in industrial, marine, and OEM applications. This pump features precision-cast bronze gears paired with a stainless steel shaft and Buna lip seal construction, delivering consistent performance across demanding operating conditions. With a 10 GPM displacement capacity and maximum operating speed of 1750 RPM, the N4000R-S3 excels in fuel transfer, HVAC systems, irrigation applications, and industrial fluid movement where corrosion resistance and durability are essential.
The pump is designed to handle oils, lubricants, diesel fuel, water, and compatible chemicals within a pH range of 4-10. The built-in internal relief valve is factory-preset at 50 PSIG, providing automatic pressure protection with maximum discharge pressures of 100 PSI for non-lubricants and 150 PSI for oils and lubricants. Its self-priming capability enables suction lifts up to 20 feet, and the operating temperature range spans -40°F to 212°F, ensuring reliable performance in temperature-sensitive environments.
The N4000R-S3 incorporates self-lubricating carbon-graphite bearings for extended service life and reduced maintenance. The pedestal mounting configuration accommodates both flexible coupling and pulley-driven installations, providing installation flexibility for various applications. With a maximum viscosity rating of 50,000 SSU and bronze and stainless steel construction, this gear pump delivers superior corrosion resistance for marine and coastal industrial environments.
Key Features
- Precision-cast bronze gears with stainless steel shaft providing superior corrosion resistance and long service life
- Buna NBR lip seal with metal case spring-energized design for reliable leak-free operation
- Self-lubricating carbon-graphite bearings requiring minimal maintenance with extended service intervals
- Built-in internal relief valve factory-preset at 50 PSIG for automatic system pressure protection
- Self-priming design with maximum 20 feet suction lift capability for installation flexibility
- Compatible with flexible coupling and pulley-driven mechanical power transmission installations
Applications
- Diesel and fuel oil transfer systems for industrial, marine, and mobile equipment applications
- HVAC heating and air conditioning systems requiring consistent fluid circulation and temperature management
- Irrigation and agricultural water transfer applications with self-priming capability requirements
- Waste water sampling and wastewater handling systems requiring chemical-resistant construction
- Industrial fluid transfer systems handling oils, lubricants, and compatible chemicals in manufacturing environments
Specifications
- Port Size: 1/2 inch NPT inlet and discharge connection
- Displacement: 10 GPM gallons per minute at 1750 RPM maximum operating speed
- Maximum Operating Speed: 1750 RPM revolutions per minute
- Materials: Bronze housing, precision-cast gears, stainless steel shaft, carbon-graphite bearings
- Seal Type: Buna NBR lip seal with metal case spring-energized single lip configuration
- Maximum Pressure: 150 PSI for oils and lubricants, 100 PSI for water and non-lubricants
- Operating Temperature: -40°F to 212°F for wide environmental compatibility range
- Maximum Suction Lift: 20 feet for self-priming operation from below-surface fluid sources
- Maximum Viscosity: 50,000 SSU Saybolt Seconds Universal for heavy viscosity fluid compatibility
- Relief Valve: 50 PSIG factory preset internal relief valve protection
Frequently Asked Questions
Q: What makes the Oberdorfer N4000R-S3 suitable for marine and industrial fuel transfer applications?
The N4000R-S3 features bronze housing and stainless steel shaft construction that provides superior corrosion resistance in marine and coastal environments. The Buna seal material is compatible with diesel fuel and petroleum products, making it ideal for fuel transfer systems in boats, industrial facilities, and mobile equipment.
Q: How does the self-priming capability and 20 feet suction lift benefit my application?
The self-priming design with 20 feet maximum suction lift allows you to install the pump below the fluid source level, eliminating the need for foot valves or priming pumps. This is particularly valuable for water transfer, sump applications, and irrigation systems where convenience and reliability are essential.
Q: What is the pressure range for the N4000R-S3 and how does the relief valve provide protection?
The pump delivers a maximum of 150 PSI for oils and 100 PSI for water-based fluids. The built-in internal relief valve is factory-preset at 50 PSIG, automatically bypassing excess fluid to protect your system components and prevent pressure spikes.
Q: What maintenance and support options are available for long-term operation of the N4000R-S3?
Major overhaul kits are available to support maintenance and rebuild requirements, including all necessary replacement components such as gaskets, seals, bearings, and gears to restore pump performance and extend equipment service life.
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