

Part number 0509655 is an outlet valve seat that provides a sealing surface for the outlet valve in compatible sprayer pumps. This precision component ensures a tight shutoff and prevents backflow of fluid. It is compatible with Advantage GPX 165; Advantage GPX 220; SprayTech GPX 165; SprayTech GPX 220; SprayTech GPX1600; and SprayTech LC1600 models. Replacing a worn or damaged outlet valve seat restores proper valve sealing and maintains pump pressure.
| Part Number | 0509655 |
|---|---|
| Part Description | Outlet Valve Seat |
| Fits | Advantage GPX 165; Advantage GPX 220; SprayTech GPX 165; SprayTech GPX 220; SprayTech GPX1600; SprayTech LC1600 |
| Condition | New |
The 0509655 outlet valve seat is a precision-machined component that forms the stationary sealing surface for the outlet valve in compatible sprayer pumps. It is specifically designed for use with Advantage GPX 165; Advantage GPX 220; SprayTech GPX 165; SprayTech GPX 220; SprayTech GPX1600; and SprayTech LC1600 models. During operation, the outlet valve ball or poppet is forced against this seat by pressure and spring force, creating a leak-proof seal that prevents fluid from flowing back into the pump during the intake stroke. The seat is typically made from a hard, wear-resistant material such as carbide or hardened steel to withstand the repeated impact of the valve and the abrasive nature of paints. Over time, the valve seat can become worn, pitted, or damaged due to contamination, cavitation, or normal wear. A damaged seat will allow fluid to leak past the valve, causing loss of pressure, poor priming, and reduced efficiency. Symptoms of a faulty outlet valve seat include difficulty building pressure, the pump losing prime when stopped, or visible wear on the seat surface. Replacing a worn outlet valve seat with this genuine part restores a positive seal and reliable valve operation. This ensures that the pump can generate and maintain the high pressures required for airless spraying. When replacing the seat, it is recommended to install a new valve ball and inspect the valve cage and spring for wear.
| Valve sealing | Provides surface for valve to seal against |
|---|---|
| Backflow prevention | Prevents fluid return to pump |
| Pressure retention | Helps maintain system pressure |
| Pressure loss | Unable to build or maintain pressure |
|---|---|
| Loss of prime | Pump loses prime when stopped |
| Visible wear | Seat pitted, scored, or worn |
| Leakage | Fluid leaking past valve |
Part number 0509655 is compatible with the following sprayer models. Always verify using your equipment's serial number and parts manual.
| Brand / Series | Specific Models |
|---|---|
| Advantage GPX | 165, 220 |
| SprayTech GPX | 165, 220, 1600 |
| SprayTech LC | 1600 |
When replacing the outlet valve seat, inspecting these associated components can help ensure a complete repair.
Seals against seat; replace if worn.
Provides closing force; check for weakness.
Houses seat; check for damage.