Airless Sprayer / Elite part 762-079 is an upper seat and O-ring assembly designed to create a leak-proof seal in the valve system on compatible sprayer models. This combined unit includes the precision-machined seat and its integrated O-ring, providing a reliable sealing surface for the valve ball or poppet. Replacing a worn, pitted, or damaged upper seat and O-ring restores proper valve sealing, prevents fluid bypass, and ensures consistent pump performance.
| Part Number | 762-079 |
|---|---|
| Part Description | Upper Seat & O-Ring |
| Brand | Airless Sprayer / Elite |
| Fits | Airless Sprayer 1100 XC; Elite E15, G40 |
| Condition | New |
The 762-079 Upper Seat & O-Ring is a combined sealing assembly that provides a precision seating surface for the valve ball or poppet in the pump of compatible sprayer models. It includes both the machined seat and its integrated O-ring, ensuring proper sealing and easy installation.
The upper seat is a critical component in the valve system, working in conjunction with the valve ball or poppet to control fluid flow. During operation, the valve element seats against this precision surface, creating a seal that prevents backflow and maintains system pressure. The integrated O-ring provides a secondary seal between the seat and the pump housing, preventing external leaks. This combined assembly simplifies replacement and ensures proper fit and sealing.
Over time, the seat surface can become worn, pitted, or scored due to the constant impact of the valve element and the flow of material. The O-ring can also become compressed, hardened, or damaged from chemical exposure and pressure cycling. A worn or damaged seat and O-ring assembly can cause internal leakage, pressure loss, poor priming, and external leaks. Replacing the complete upper seat and O-ring assembly restores proper valve sealing, ensures reliable pump operation, and prevents fluid loss.
| Valve sealing | Provides precision surface for valve ball/poppet to seal against |
|---|---|
| Secondary sealing | Integrated O-ring prevents external leaks between seat and housing |
| Flow control | Essential for proper one-way valve operation |
| Pressure loss | System cannot maintain operating pressure |
|---|---|
| Backflow issues | Material flows backward through the valve |
| External leaks | Fluid escaping around the seat area |
| Visible wear / pitting | Seat surface is damaged or O-ring is hardened/cracked |
Part 762-079 is compatible with the following sprayer models. Always verify fitment using your equipment's parts diagram before ordering.
| Model | Component |
|---|---|
| Airless Sprayer 1100 XC | Upper Seat & O-Ring |
| Elite E15 | Upper Seat & O-Ring |
| Elite G40 | Upper Seat & O-Ring |
When replacing the upper seat and O-ring, these associated components are often inspected or replaced at the same time.
The mating component that seals against the seat; inspect for wear.
Other valve parts that work in conjunction with the upper seat.
The component that holds the seat; inspect for damage.
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