Before［ Tube / Cap nut pipe thread coupling ］

The customer was using a tube with a cap nut pipe thread coupling for piping carrying recirculated cooling water around a dust cover injection molding machine. However, the tube would become unpressurized when the machine stopped, causing it to collapse. Water would then leak from between the tube and coupling when the tube was once again pressurized after starting the machine. Production would stop, resulting in issues interfering with work, such as production loss and the need to perform troubleshooting.

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