Part 550-437 is a replacement seal washer used to create a leak-tight seal between threaded connections on compatible airless spray equipment. This seal washer prevents fluid bypass and pressure loss at critical connection points, ensuring consistent spray performance and reducing the risk of material leakage during operation. Installing a fresh seal washer restores proper sealing integrity and helps maintain rated operating pressure on compatible units.
| Part Number | 550-437 |
|---|---|
| Part Description | Seal Washer |
| Brand | SprayTech |
| Fits | Airless LX-70 Inline Gun |
| Condition | New |
Part 550-437 is a replacement seal washer designed specifically for use with the Airless LX-70 Inline Gun. This seal washer serves as a critical sealing component installed at threaded connection points within the fluid path. Its primary function is to create a positive seal that prevents coating material from escaping through the threads during operation. When the seal washer is compressed between mating surfaces, it fills microscopic gaps that would otherwise allow fluid to seep past, leading to drips, pressure loss, and uneven spray patterns. The washer is manufactured from a durable material selected for compatibility with a wide range of architectural coatings, including latex paints, acrylics, primers, and stains commonly used with airless spraying equipment. Over time, repeated connection cycles, overtightening, or normal wear can cause the seal washer to become compressed, hardened, or deformed. When this occurs, the washer loses its ability to maintain a leak-free seal. Symptoms of a worn seal washer include visible weeping or dripping from the connection point, difficulty achieving or maintaining proper spray pressure, and fluid accumulation around threaded fittings. Replacing the seal washer restores the original sealing performance and helps ensure that the LX-70 Inline Gun operates reliably without material waste or cleanup issues associated with leaks. For service technicians and professional painters, keeping fresh seal washers on hand allows for quick restoration of leak-free connections during routine maintenance or when troubleshooting pressure-related performance concerns.
| Leak prevention | Creates a fluid-tight seal at threaded connections to eliminate drips and weeping |
|---|---|
| Pressure retention | Maintains system pressure by preventing fluid bypass through threads |
| Connection integrity | Provides a replaceable sealing surface that protects metal threads from galling |
| Visible leakage | Fluid seeps from the threaded connection during operation |
|---|---|
| Compressed or hardened washer | Seal washer appears flattened, brittle, or no longer compresses properly |
| Pressure fluctuation | Difficulty maintaining consistent spray pressure traced to connection seal failure |
| Routine maintenance | Replacement during disassembly ensures leak-free reassembly |
Part 550-437 is compatible with the Airless LX-70 Inline Gun. Confirm fitment by verifying the connection point requires a seal washer of this configuration.
| Equipment Model | Component |
|---|---|
| Airless LX-70 Inline Gun | Seal washer for threaded connections |
When addressing leaks or performing maintenance on the Airless LX-70 Inline Gun, these components are frequently inspected alongside the seal washer.
The threaded fitting that connects the hose to the gun should be inspected for thread damage or debris that could compromise seal washer performance.
The swivel fitting allows hose movement; worn seals within the swivel can create leaks that may be mistaken for a failed seal washer.
A clogged filter can cause pressure buildup that stresses connections; inspecting and cleaning the filter supports overall system performance.
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