Part 700-821 is a Teflon ring/seal designed to provide a leak-free seal in the fluid section of compatible airless sprayers. This ring prevents material from bypassing the piston or rod, ensuring consistent pressure and smooth operation. Replacing a worn, hardened, or damaged Teflon seal restores spraying efficiency and prevents costly fluid leaks.
| Part Number | 700-821 |
|---|---|
| Part Description | Teflon Ring/Seal |
| Brand | OEM Replacement |
| Fits | Airless Sprayer 330, 340 International, 440 XC, 550 XC, 640 XC; Advantage 400, 500; Epic 447ex, 660ex; Helix LP; Impact 340, 400; PowrLiner 2800, 3100; RentSpray Series and more |
| Condition | New |
The 700-821 Teflon Ring/Seal is a precision-molded component that fits within the fluid section of numerous airless sprayer models. Constructed from durable Teflon material, it provides excellent chemical resistance and low friction while maintaining a positive seal around the moving piston or rod. This seal is essential for building and holding the high pressures required for airless spraying applications.
With extended use, Teflon seals can become compressed, hardened, or nicked, allowing material to leak past the piston. This results in pressure loss, uneven spray patterns, and material waste. A compromised seal may also allow fluid to enter unwanted areas, leading to more extensive repairs. Replacing the 700-821 Teflon ring restores the integrity of the fluid section and ensures consistent, reliable performance.
| Pressure containment | Prevents fluid from leaking past the piston during the pumping stroke |
|---|---|
| Low friction operation | Teflon material reduces wear on moving components |
| Chemical resistance | Withstands a wide range of coatings and solvents |
| Pressure drop | Sprayer cannot maintain consistent operating pressure |
|---|---|
| External leakage | Fluid visible around the throat or packing nut |
| Material bypass | Paint seeping past the seal during priming or operation |
| Hardened seal | Teflon has lost flexibility and no longer conforms to mating surfaces |
Part 700-821 is compatible with the following airless sprayer models. Always verify fitment using your equipment's parts diagram before ordering.
| Model | Component |
|---|---|
| Airless Sprayer 330 | Teflon Ring/Seal |
| Airless Sprayer 340 International Model | Teflon Ring/Seal |
| Airless Sprayer 440 XC | Teflon Ring/Seal |
| Airless Sprayer 440 I | Teflon Ring/Seal |
| Airless Sprayer 440 IX | Teflon Ring/Seal |
| Airless Sprayer 550 XC | Teflon Ring/Seal |
| Airless Sprayer 540 IX | Teflon Ring/Seal |
| Airless Sprayer 640 XC | Teflon Ring/Seal |
| Airless Sprayer 640 I | Teflon Ring/Seal |
| Airless Sprayer 640 IX | Teflon Ring/Seal |
| Airless Sprayer 640 GXC | Teflon Ring/Seal |
| Advantage 400 | Teflon Ring/Seal |
| Advantage 500 | Teflon Ring/Seal |
| Epic 447ex | Teflon Ring/Seal |
| Epic 447HPX | Teflon Ring/Seal |
| Epic 660ex | Teflon Ring/Seal |
| Epic 660HPX | Teflon Ring/Seal |
| Epic 690 GX | Teflon Ring/Seal |
| Epic 690HPG | Teflon Ring/Seal |
| Helix LP | Teflon Ring/Seal |
| Impact 340 | Teflon Ring/Seal |
| Impact 400 | Teflon Ring/Seal |
| Impact 640 I | Teflon Ring/Seal |
| Impact 640 IA | Teflon Ring/Seal |
| Impact 640 | Teflon Ring/Seal |
| Impact X410 | Teflon Ring/Seal |
| Impact X440 | Teflon Ring/Seal |
| Impact X540 I | Teflon Ring/Seal |
| Performer 640 I | Teflon Ring/Seal |
| PowrLiner 2800 | Teflon Ring/Seal |
| PowrLiner 3100 | Teflon Ring/Seal |
| PowrLiner 1800M | Teflon Ring/Seal |
| PowrLiner 2800M | Teflon Ring/Seal |
| ProMark II | Teflon Ring/Seal |
| RentSpray450 | Teflon Ring/Seal |
| RentSpray600 | Teflon Ring/Seal |
| RentSpray650 | Teflon Ring/Seal |
| RentSpray600 Impact | Teflon Ring/Seal |
| RentSpray500 | Teflon Ring/Seal |
| RentSpray700 | Teflon Ring/Seal |
| RentSpray Plus | Teflon Ring/Seal |
When servicing the fluid section, these related parts are commonly inspected and replaced alongside the Teflon ring.
If the piston surface is scratched or worn, a new seal will not hold pressure effectively.
Upper seals that work in conjunction with the Teflon ring; replace as a set for complete sealing.
Often includes all seals, rings, and gaskets needed for a complete fluid section overhaul.
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