

Part number 0288771 is a diaphragm assembly used in compatible sprayer systems to create a flexible seal and transfer pressure. This component is critical for the operation of certain pumps or regulators. It is compatible with HVLP Airspray ProFinish AS1130 and SprayTech ED655 models. Replacing a worn or damaged diaphragm assembly restores proper pressure control and prevents leaks.
| Part Number | 0288771 |
|---|---|
| Part Description | Diaphragm Assembly |
| Fits | HVLP Airspray ProFinish AS1130; SprayTech ED655 |
| Condition | New |
The 0288771 diaphragm assembly is a flexible sealing and actuating component used in specific applications within compatible sprayer systems. It is specifically designed for use with HVLP Airspray ProFinish AS1130 and SprayTech ED655 models. A diaphragm is a thin, flexible disc that seals an area while allowing for movement or pressure transfer. In sprayer systems, diaphragms are commonly found in regulators, pumps, or valves. In a pressure regulator, the diaphragm senses output pressure and moves to control the valve, maintaining a set pressure. In a pump, a diaphragm can be the driving element that moves fluid. This assembly includes the diaphragm itself, which is typically made from a durable, flexible material like rubber or PTFE, along with any supporting plates, backing discs, or seals that are part of the unit. The diaphragm must be flexible yet strong to withstand repeated flexing and pressure cycles. Over time, diaphragms can become fatigued, cracked, or torn, leading to loss of pressure control, erratic operation, or leaks. Symptoms of a faulty diaphragm assembly include the sprayer failing to build or maintain pressure, pressure surging, air bubbles in the fluid (if used in a pump), or visible leakage from the regulator or pump body. Replacing a worn or damaged diaphragm assembly with this genuine part restores proper sealing and pressure control. This ensures that the sprayer operates reliably and delivers consistent performance. When replacing, it is important to ensure the diaphragm is correctly seated and that all related components are clean.
| Pressure regulation | Maintains set pressure in regulators |
|---|---|
| Fluid pumping | Acts as driving element in diaphragm pumps |
| Sealing | Provides flexible, leak-proof barrier |
| Pressure loss | Unable to build or maintain pressure |
|---|---|
| Erratic operation | Pressure surging or fluctuation |
| Fluid leakage | Leaks from regulator or pump body |
| Visible damage | Cracked, torn, or fatigued diaphragm |
Part number 0288771 is compatible with the following sprayer models. Always verify using your equipment's serial number and parts manual.
| Brand / Series | Specific Models |
|---|---|
| HVLP Airspray | ProFinish AS1130 |
| SprayTech ED | 655 |
When replacing the diaphragm assembly, inspecting these associated components can help ensure a complete repair.
Works with diaphragm in regulators; check for wear.
Provides counter-force; check for fatigue.
Inspect for damage or debris.