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What causes an airless sprayer to fail to build pressure?

Release Date:

Jul 20,2021

An airless sprayer is a high‑end device that delivers a large flow rate, powered by a brushless DC motor and equipped with electronic pressure regulation and a digital pressure display. Compared to conventional models, this advanced airless sprayer boasts a longer service life and can handle a wide variety of coating applications. If you encounter a situation where the putty fails to build up pressure during spraying, it’s essential to identify the underlying cause.

Airless sprayer It is a high‑capacity airless sprayer that employs a DC brushless motor, electronic pressure regulation, and a digital pressure display, making it a premium‑grade model. Compared with conventional models, this new‑generation airless sprayer boasts a longer service life and can handle a wide variety of decorative applications. If you encounter the issue of insufficient pressure during putty spraying, it’s essential to identify the underlying cause.

It is very likely caused by an air leak in the feed pipe, specifically at the joint of the feed pipe. O If the sealing ring is damaged, this phenomenon may also occur. Alternatively, at the joint between the feed hose and the feed elbow, if the connecting nut is not tightened properly, air leakage can result. All of these factors can lead to… Airless sprayer The phenomenon of insufficient pressure has occurred. Additionally, the large and small steel balls and valve plates inside the pump have become stuck together. If the ball valve is not moving, cleaning the large and small steel balls and the sliding plates should resolve the issue.

If the steel ball and valve disc inside the pressure relief valve become seized, air trapped in the pump housing will no longer be able to vent properly. At this point, you can initiate the pressure‑relief procedure and clean the steel ball and valve disc within the relief valve, restoring it to normal operation. The causes outlined above are the primary reasons why an airless sprayer fails to build pressure, along with corresponding troubleshooting steps. Airless sprayer Primarily, a plunger pump is used to pressurize the coating, thereby achieving high pressure.

Under such high pressure, the coating material is conveyed through a high-pressure hose into the spray gun, where the nozzle releases the pressure to create an atomized mist, forming an extremely dense coating on the wall surface. Since the coating is applied by the spray gun, it’s important to select a nozzle with an appropriate orifice size that matches the specific spray equipment. In most cases, tungsten‑carbide nozzles are preferred because they are more durable, produce finer and more uniform atomization, and deliver superior results. This type of spray equipment plays a crucial role in coating applications for automobiles, chemical‑process equipment, and both interior and exterior walls of buildings.

When using an airless sprayer, it’s essential to pay close attention to the coating thickness; only then can you achieve a more uniform finish. At the point where the spray gun connects to the nozzle, many components must be kept consistent—typically following the manufacturer’s specifications. If multiple coats are required, alternate between top-to-bottom and bottom-to-top strokes rather than spraying in a single direction, ensuring an even application.

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