AMT Pump 285J-K5-285X-301-VS Cast Iron Pump End with Silicon Carbide/Viton Seal
If you've got an AMT 285J or 285K self-priming centrifugal pump with a motor that's still in good shape, there's no reason to replace the whole unit when the pump end wears out. The 285J-K5-285X-301-VS is a complete cast iron pump end, built to bolt right onto your existing motor and get the pump back in service without the extra cost of a full replacement. It comes with the 285X-301-VS silicon carbide/Viton mechanical seal and O-ring already installed, so there's no separate seal kit to source or fit before you can put the pump back to work.
This pump end carries over the same design AMT is known for in its 285 series: a dual volute housing that reduces radial load on the motor shaft, a centerline discharge that helps prevent vapor lock, and a self-cleaning semi-open impeller that handles a bit of debris without losing prime. It's rated to self-prime to 20 feet of lift and move up to 82 GPM at heads to 70 feet, with 1" and 1-1/4" NPT suction and discharge ports that match standard piping without adapters. The upgraded silicon carbide/Viton seal extends the working temperature range up to 200°F and holds up better than a standard Buna-N seal when the pumped liquid is a little more aggressive or runs warmer than average.
This is a general-purpose industrial and commercial pump end — it isn't limited to marine or boating use. Shops, farms, plant maintenance crews, and rental fleets use this same pump end for washdown, dewatering, boosting, and liquid transfer jobs across a wide range of non-flammable, non-abrasive fluids. If you already own a compatible AMT 285J or 285K frame and just need a dependable, seal-equipped pump end to bring it back to spec, this is a straightforward, drop-in solution.
Key Features
- Silicon carbide/Viton mechanical seal and O-ring pre-installed at the factory
- Cast iron pump end construction for durability in industrial duty cycles
- Dual volute design to reduce radial load on the motor shaft
- Centerline discharge to help prevent vapor binding
- Self-cleaning, semi-open impeller for handling light debris
- Self-primes to 20 feet of lift
- Pump end only — designed to fit onto compatible existing 285J/285K series motors
- Extended temperature tolerance up to 200°F with Viton seal components
Applications
- General liquid transfer and dewatering
- Washdown operations in industrial and agricultural settings
- Pressure boosting for water supply lines
- Recirculation for tanks, holding basins, and process loops
- Pump end rebuilds for existing AMT 285J/285K installations
- Non-flammable, non-abrasive fluid handling in commercial and plant environments
Specifications
- Port Size: 1" and 1-1/4" NPT (suction and discharge)
- Construction: Cast iron pump end housing
- Seal: Silicon carbide/Viton mechanical seal with Viton O-ring (285X-301-VS, installed)
- Impeller: Self-cleaning, semi-open type
- Maximum Flow: Up to 82 GPM
- Maximum Head: Up to 70 feet
- Self-Priming Lift: Up to 20 feet
- Maximum Fluid Temperature: Up to 200°F (with Viton seal)
- Compatibility: AMT 285J and 285K series self-priming centrifugal pumps
- Motor: Not included — pump end only, designed to mate with an existing compatible motor
Frequently Asked Questions
Q: Does this pump end include a motor?
A: No. The 285J-K5-285X-301-VS is a pump end assembly only and is designed to be installed onto a compatible existing AMT 285J or 285K motor frame.
Q: What makes the silicon carbide/Viton seal option different from the standard seal?
A: The silicon carbide/Viton seal is more resistant to wear and higher operating temperatures than the standard Buna-N seal, making it a better fit for warmer or slightly more demanding fluid conditions.
Q: Can this pump end be used for anything other than water?
A: It's built for non-flammable, non-abrasive liquids compatible with cast iron, silicon carbide, and Viton components. It's suited to a wide range of general industrial, agricultural, and commercial fluid-handling tasks, not just water.
Q: Is any assembly required after purchase?
A: The mechanical seal and O-ring arrive pre-installed, so the main step is mounting the pump end to your existing motor and reconnecting the suction and discharge piping.
Q: Will this fit any AMT pump model?
A: This pump end is designed specifically for compatible AMT 285J and 285K series self-priming centrifugal pump frames — always confirm your existing model number before ordering to ensure a proper fit.
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