Description

When your Hypro transfer pump starts leaving puddles under your equipment or you notice the flow rate dropping off, worn seals are usually the culprit. Hypro’s polypropylene pumps see hard use moving water and liquid fertilizers, and over time those seals take a beating from pressure cycles and chemical exposure. This complete seal kit gets your pump back to like-new performance without the cost of a replacement pump.

What You’re Getting

Complete seal package with diffuser gasket, pump body O-ring, flapper valve, seal O-ring, and mechanical seal
Quality components designed specifically for Hypro 3430-series pump tolerances and operating conditions
Chemical-resistant materials that handle modern fertilizers and agricultural chemicals
Everything needed for a complete pump rebuild in one convenient kit

Built for Real Farm Work

This seal kit fits Hypro 3430-series transfer pumps commonly found on nurse tanks, spray rigs, and liquid fertilizer applicators. These polypropylene pumps are workhorses for moving water, liquid fertilizer, and other agricultural fluids where corrosion resistance matters. Whether you’re filling spray tanks or transferring liquid fertilizer, this pump keeps the flow going when you need it.

Made to Last

Each seal is specifically sized and made from materials designed to handle the pressure and chemical exposure inside your transfer pump. The mechanical seal assembly handles the rotating shaft loads while the gaskets and O-rings prevent external leaks. These aren’t generic hardware store seals – they’re engineered for agricultural pump applications.

Installation Notes

The key to success is cleanliness – any contamination ruins new seals immediately. Clean all surfaces thoroughly before assembly and use assembly lube on all seals during installation. Take your time with the mechanical seal – proper alignment prevents premature failure. Most rebuilds take 1-2 hours if you work methodically.