Oberdorfer S92316CA Stainless Steel ChemSteel Gear Pump for Corrosive Chemical Transfer
The Oberdorfer S92316CA is a 316 stainless steel gear pump end from the ChemSteel S923 series, built for fluid handling jobs where corrosion resistance and reliable, steady flow matter more than anything else. It's a pump end only, meaning it pairs with a separately supplied motor, and it's just as much at home on a chemical processing skid or an agricultural blending system as it is on a boat. That range is really the point of this design: it's a general-purpose workhorse for moving demanding liquids, not a single-industry specialty item.
What sets this pump apart mechanically is the combination of W88 stainless steel drive and idle gears with self-lubricating graphite-carbon bearings, so the internal wear surfaces are protected by the fluid being pumped rather than an external grease system. The PTFE mechanical seal, with its carbon-to-ceramic faces and 316 stainless steel hardware, holds up well against aggressive chemicals while keeping the pump leak-free during continuous duty. The three-section, O-ring sealed housing is thru-bolted for easy teardown, and the helical gearing quiets operation noticeably compared to older spur-gear designs.
In practice, this pump shows up in chemical dosing and transfer lines, brine injection systems, hydraulic fluid circulation loops, beverage cooling setups, and additive or solvent transfer applications, in addition to marine and offshore fluid handling. Because it's bi-directional, the same unit can push fluid in either direction just by reversing motor rotation, which gives engineers real flexibility when laying out piping. As with any positive displacement pump, it should always be installed with a pressure relief valve to protect against blocked-line over-pressurization.
Key Features
- 316 stainless steel housing and shaft construction for strong corrosion resistance
- W88 stainless steel drive and idle gears built for demanding, continuous-duty service
- Self-lubricating graphite-carbon bearings, lubricated by the pumped fluid itself
- PTFE (Teflon) mechanical seal with carbon-to-ceramic faces and 316 stainless steel components
- Three-section, O-ring sealed thru-bolt housing for straightforward servicing and parts replacement
- Helical gearing reduces operating noise by up to 10 dB versus spur gear designs
- Bi-directional operation, reversible simply by switching motor rotation
- Rated for shaft speeds up to 1750 RPM
Applications
- Corrosive chemical transfer and metering, including acids, caustics, and solvents
- Chemical dosing for water treatment and industrial processing lines
- Brine injection and beverage cooling systems
- Hydraulic fluid circulation
- Transfer of adhesives, resins, catalysts, polymers, and flocculants
- Marine and offshore fluid transfer equipment
- Agricultural chemical transfer and blending
Specifications
- Part Number: S92316CA
- Pump Type: External gear, positive displacement, ChemSteel S923 series
- Housing Material: 316 stainless steel
- Shaft Material: 316 stainless steel
- Drive Gear / Idle Gear: W88 stainless steel
- Bearings: Graphite-carbon, self-lubricating
- Seal: PTFE / carbon / ceramic / 316 stainless steel single wedge mechanical seal
- Port Size: 1-1/2 inch FNPT (inlet and discharge)
- Maximum Shaft Speed: 1750 RPM
- Flow Rate: Up to 15 GPM
- Viscosity Range: Up to 100,000 cps (462,000 SSU) at reduced shaft speeds
- Suction Lift: Up to 20 feet (6.1 meters)
- Configuration: Pump end only, motor not included; external pressure relief valve required
Frequently Asked Questions
Q: Does the Oberdorfer S92316CA include a motor?
A: No, the S92316CA is a pump end only. It needs to be paired with a separately purchased motor sized to a compatible NEMA or IEC frame for close-coupled or base-mounted operation.
Q: Is the S92316CA suitable for high-viscosity or thick fluids?
A: Yes, the gear design can handle viscous fluids up to roughly 100,000 cps, though shaft speed should be reduced for the thickest fluids to keep the gears and bearings running efficiently.
Q: What does the "CA" seal designation mean on this pump?
A: It indicates a PTFE (Teflon), carbon, and ceramic mechanical seal with 316 stainless steel hardware, which differs from other S923 variants that use Viton bellows seals or other elastomers suited to different chemicals.
Q: How much maintenance do the bearings and seal require?
A: Because the graphite-carbon bearings are self-lubricating and process-lubricated by the fluid being pumped, they typically need minimal scheduled maintenance, though periodic inspection is recommended for continuous-duty or abrasive service.
Q: Can the flow direction be reversed on this pump?
A: Yes, the pump is bi-directional. Reversing the driving motor's rotation swaps which port serves as suction and which serves as discharge, with no internal modification needed.
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