Oberdorfer S9301FCB Stainless Steel Gear Pump for Corrosive Chemical Transfer
The Oberdorfer S9301FCB is a rugged external gear pump built for facilities that move demanding fluids day in and day out. Its 316 stainless steel housing and shafts, paired with a PTFE idle gear and carbon bearings, give it the chemical resistance needed for acids, caustics, solvents, and other aggressive liquids that would wear down softer materials quickly. While gear pumps like this one are common on boats and marine vessels, the S9301FCB is just as much at home in a chemical plant, an agricultural operation, or an industrial processing line, wherever a dependable positive displacement pump is needed.
What sets this pump apart is how it balances durability with practicality. The three-section, o-ring sealed thru-bolt housing makes servicing straightforward, so maintenance teams can rebuild or replace internal components without tearing the whole system apart. The carbon bearings are chosen specifically for wear resistance, helping the pump hold up under continuous duty, while the stainless and PTFE gear combination keeps corrosive chemicals from degrading critical wear surfaces over time. Because it's a positive displacement design, flow stays steady and predictable no matter how system pressure shifts, which matters a great deal when dosing accuracy or consistent transfer rates are part of the job.
The S9301FCB also offers flexibility that a lot of single-purpose pumps can't match. It runs equally well in either direction, so reversing flow is as simple as switching the motor's rotation, and it can handle everything from thin solvents to thick, viscous resins and adhesives without swapping equipment. For plants and operators who need one pump that can adapt to shifting fluid-handling demands without sacrificing corrosion resistance or service life, the S9301FCB is a solid, no-nonsense choice.
Key Features:
- 316 stainless steel housing and shafts for superior corrosion resistance
- Stainless steel drive gear paired with a PTFE (Teflon) idle gear for chemical compatibility
- Carbon bearings selected for wear resistance and long service life
- Three-section, o-ring sealed thru-bolt design for easy servicing and parts replacement
- Bi-directional operation; flow reverses by switching motor rotation
- Positive displacement external gear design for consistent, non-pulsating flow
- Rated to handle viscous fluids up to approximately 100,000 cps (462,000 SSU) at reduced shaft speeds
Applications:
- Chemical transfer and dosing of acids, caustics, and solvents
- Circulation of hydraulic fluids in industrial systems
- Brine injection and beverage cooling processes
- Transfer of adhesives, resins, polymers, and flocculants
- Dosing of fertilizers, biocides, dyes, and bleaching chemicals
- Fluid blending support for oilfield and fracking operations
- Underwater and deep-sea fluid transfer applications
- General industrial, agricultural, and marine fluid handling
Specifications:
- Pump Type: External gear, positive displacement
- Housing Material: 316 Stainless Steel
- Shaft Material: 316 Stainless Steel
- Gear Configuration: 316 Stainless Steel drive gear / PTFE Teflon idle gear
- Bearing Material: Carbon
- Inlet Port: 1-1/2 inch FNPT
- Discharge Port: 1-1/2 inch FNPT
- Maximum Shaft Speed: 1750 RPM
- Maximum Flow Rate: Up to 20 GPM
- Viscosity Range: Up to 100,000 cps (462,000 SSU) at reduced shaft speeds
- Suction Lift: Up to 20 feet (6.1 meters) for new pumps
- Operation: Bi-directional
- Construction: Three-section, o-ring sealed thru-bolt housing
Frequently Asked Questions
Q: Is the Oberdorfer S9301FCB self-priming?
A: Yes. As an external gear pump, it draws fluid through positive displacement action and does not require a separate priming step before startup, provided the pump is not run dry.
Q: What should be avoided when operating this pump?
A: Because gear pumps rely on close internal running clearances, solids, abrasives, and paint pigments should be avoided or filtered out with a suction screen or start-up strainer, since they can accelerate wear and damage the gears.
Q: Does the S9301FCB need a pressure relief valve installed?
A: Yes. Since it's a positive displacement pump, a relief valve should be included in the system to protect the pump from over-pressurization if a downstream valve closes or a line becomes blocked.
Q: What industries rely on the S9301FCB gear pump?
A: It's used across chemical processing, industrial, agricultural, and marine operations, wherever corrosive or difficult fluids need to be transferred reliably.
Q: How is flow direction reversed on this pump?
A: Flow direction is reversed by switching the driving motor's rotation according to the motor wiring diagram; the pump performs equally well in either direction without any modification.
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