

SprayTech part 50512 is a back up ring designed to support and protect the o‑ring in high‑pressure applications on compatible SprayTech Airless sprayers. This ring prevents extrusion of the o‑ring under pressure, ensuring a reliable seal and extending seal life. Replacing a worn, cracked, or missing back up ring restores proper sealing integrity and prevents leaks in the fluid section.
| Part Number | 50512 |
|---|---|
| Part Description | Back Up Ring |
| Brand | SprayTech |
| Fits | SprayTech Airless EP2300 SE, EP2300, EP2400, EP2510 |
| Condition | New |
The SprayTech 50512 Back Up Ring is a critical sealing support component used in the fluid section or manifold of compatible SprayTech Airless sprayers. It is installed alongside an o‑ring to prevent extrusion of the o‑ring under high pressure. The back up ring provides a rigid support that allows the o‑ring to maintain its shape and sealing force, even during pressure spikes and cycling.
Over time, back up rings can become worn, cracked, or deformed due to pressure cycling, chemical exposure, or improper installation. A damaged back up ring may allow the o‑ring to extrude into gaps, leading to seal failure, pressure loss, and fluid leaks. Replacing the back up ring restores proper support for the o‑ring, ensuring reliable sealing and extended seal life.
| Supports o‑ring | Prevents extrusion of the o‑ring under high pressure |
|---|---|
| Maintains seal integrity | Helps the o‑ring maintain proper shape and sealing force |
| Extends seal life | Reduces wear on the o‑ring, prolonging service intervals |
| Visible damage | Cracks, deformation, or wear on the back up ring |
|---|---|
| O‑ring extrusion | Signs that the o‑ring has been forced into gaps |
| Pressure loss / leaks | Seal failure leading to fluid bypass or external leakage |
| During o‑ring replacement | Always replace when the associated o‑ring is serviced |
SprayTech part 50512 is compatible with the following SprayTech Airless sprayer models. Always confirm fitment using the correct parts diagram for your exact model and serial number.
| Models | Component |
|---|---|
| SprayTech Airless EP2300 SE | Back Up Ring |
| SprayTech Airless EP2300 | Back Up Ring |
| SprayTech Airless EP2400 | Back Up Ring |
| SprayTech Airless EP2510 | Back Up Ring |
When replacing the back up ring, these associated components are often inspected and replaced at the same time to ensure a complete repair.
The back up ring works with the o‑ring. Replace both together for a reliable seal.
If the fluid section is being serviced, replace all packings and seals.
Check mating surfaces for damage or debris that could affect sealing.