The Clogging Reasons and Solving Ways for the Water Jet Focusing Tubes

???The clogging reasons and solving ways for the water jet focusing tubes

In the process of abrasive waterjet cutting, the tungsten carbide water jet focusing tube is a vital component. After all, it is in this tube where high-pressure water and abrasives are focused on an efficient cutting jet. And the water jet tube’s inner size is very small. Then It is often clogged during this procedure.??

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The reasons for clogging are spawned by four primary issues: moisture, oversized particles, foreign debris, and dust.

? Moisture. Moisture can cause abrasive to clump and then clog.

? Oversized particles. The abrasive particle distribution must be such that the largest grain is no larger than 1/3 of the mixing tube ID (internal diameter). So, if you are using a 0.76mm tube, the largest particle must be smaller than 0.25mm or you will very likely get clogging the mixing tube over time as 3 grains try to exit the mixing tube at the same time.

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? Debris. Debris in the garnet delivery system is usually caused by carelessly cutting open the bag of garnet or by not using a trash screen atop the garnet storage hopper. Make sure debris isn’t in with your abrasive or you can cause stoppage of cutting by clogging.

The proportion of dust and fines Dust increases static electricity and can cause the non-smooth abrasive flow to the head. Dust-free abrasives flow better. And fines are particles that are too small to serve any useful cutting action.

How do I clear a clogged water jet focusing tube??

Clear blocked tungsten carbide focusing tubes can be a menace – consider the force applied to the debris when forced into the focusing tube at 55,000 psi!?

1. Remove the waterjet cutting tube and abrasive feed hose from the waterjet cutting head.?

2. Turn the abrasive focus tube upside down and refit the clamping collet and retaining nut.

3. Insert the focusing tube into the water jet cutting head and secure it.?

4. Restart the pump with water only and open the water jet cutting head for 1-2 seconds.?

Your waterjet focusing nozzle should now be clear and ready to cut!