Part number 800-333 is a Back-Up Ring PTFE used in Airless Sprayer 1140 I and IA, 840 I and IA; Advantage 1100, 700; Helix FR, VR; Impact 1140, 1640, 740-840, 840, 840 I and IA, 740, 1140 I and IA, 1040; PowrTex 1200SF; and Performer 1140 IX models. This PTFE ring is installed behind an O‑ring to prevent extrusion under high pressure, ensuring seal integrity in pump and fluid sections. Replacing a worn or damaged back‑up ring restores reliable sealing and prevents fluid leaks.
| Part Number | 800-333 |
|---|---|
| Part Description | Back-Up Ring PTFE |
| Brand | Multiple |
| Fits | Airless Sprayer 1140 I, 1140 IA, 840 I, 840 IA; Advantage 1100, 700; Helix FR, VR; Impact 1140, 1640, 740-840, 840, 840 I, 840 IA, 740, 1140 I, 1140 IA, 1040; PowrTex 1200SF; Performer 1140 IX |
| Condition | New |
The 800-333 Back-Up Ring PTFE is a critical sealing component used in various Airless Sprayer, Advantage, Helix, Impact, PowrTex, and Performer models. It is designed to be installed behind an O‑ring in high‑pressure applications to prevent the O‑ring from extruding into the clearance gap.
Made from PTFE (polytetrafluoroethylene), this back‑up ring offers excellent chemical resistance, low friction, and the ability to withstand high pressures and temperatures. It ensures that the O‑ring remains properly seated, maintaining a leak‑tight seal and extending the life of the sealing system. Over time, back‑up rings can become worn, cracked, or deformed, leading to O‑ring extrusion and seal failure. Replacing a damaged back‑up ring restores seal integrity and prevents fluid leaks that can cause pressure loss and equipment damage.
| O‑ring protection | Prevents O‑ring extrusion into clearance gaps under pressure |
|---|---|
| Seal integrity | Maintains proper O‑ring position for leak‑free sealing |
| Pressure resistance | Allows O‑ring to withstand higher pressures |
| Visible wear / damage | Cracks, deformation, or surface damage |
|---|---|
| O‑ring extrusion | O‑ring shows signs of nibbling or extrusion into gap |
| Fluid leaks | Leaks occurring past the seal assembly |
| Disassembly | Always replace back‑up ring when servicing O‑rings |
Part number 800-333 is compatible with the following models. Always confirm fitment using the correct parts diagram for your exact model and revision.
| Brand / Model | Component |
|---|---|
| Airless Sprayer 1140 I | Back-Up Ring PTFE |
| Airless Sprayer 1140 IA | Back-Up Ring PTFE |
| Airless Sprayer 840 I | Back-Up Ring PTFE |
| Airless Sprayer 840 IA | Back-Up Ring PTFE |
| Advantage 1100 | Back-Up Ring PTFE |
| Advantage 700 | Back-Up Ring PTFE |
| Helix FR | Back-Up Ring PTFE |
| Helix VR | Back-Up Ring PTFE |
| Impact 1140 | Back-Up Ring PTFE |
| Impact 1640 | Back-Up Ring PTFE |
| Impact 740-840 | Back-Up Ring PTFE |
| Impact 840 | Back-Up Ring PTFE |
| Impact 840 I | Back-Up Ring PTFE |
| Impact 840 IA | Back-Up Ring PTFE |
| Impact 740 | Back-Up Ring PTFE |
| Impact 1140 I | Back-Up Ring PTFE |
| Impact 1140 IA | Back-Up Ring PTFE |
| Impact 1040 | Back-Up Ring PTFE |
| PowrTex 1200SF | Back-Up Ring PTFE |
| Performer 1140 IX | Back-Up Ring PTFE |
When replacing a back‑up ring, these components are often inspected or replaced at the same time to ensure complete sealing system reliability.
The mating O‑ring should always be replaced with the back‑up ring.
Inspect the sealing groove for damage or corrosion.
Check for scoring that could damage seals.
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