Question:
I need a tube that fits my 12V Peristaltic Pump for DTF/DTG printers used in a white ink management system. The last one I ordered didn't fit-it wasn't as flexible as the original tube that came with the pump. That's the tube I need. The problem is that the pump keeps burning this tube; even the new pump I just ordered is doing the same. Should I leave the pump off until printing? I also noticed the pump leaking ink even though there are no visible cracks, just burn marks on the tube.
Answer:
Now, regarding your question-peristaltic pump tubing for DTF or DTG white ink systems typically uses C4-size silicone tubing for the pump head. Most systems are designed with adapters that let you connect C3 tubing on either side for easier integration with ink lines. The C4 tubing is slightly thicker and more flexible, allowing the pump rollers to maintain proper compression and ink flow without leaking.
If the tube is burning or showing scorch marks, it's usually due to friction or heat generated by continuous operation of the pump. A few possible causes include:
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Pump Running Continuously - Leaving the pump on for extended periods can cause heat buildup. White ink systems are designed for intermittent use, so it's best to run the pump only during circulation or printing, not continuously when idle.
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Incorrect Tube Material - Some replacement tubes are made from rigid PVC or polyurethane, which are not as heat-tolerant or flexible as silicone. Always use medical-grade or high-flexibility silicone tubing, preferably rated for peristaltic pumps.
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Roller Pressure Too High - If the pump rollers are too tight, they can pinch the tube excessively, causing friction burns. Check the pump's compression adjustment if your model allows it.
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Chemical Compatibility - White inks are heavily pigmented and can react with certain tubing materials, softening or degrading them over time. Always confirm the tube is chemical-resistant to titanium dioxide, which is common in white inks.
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Leakage Without Cracks - Even without visible damage, micro-deformation or softening in the tube can cause leaks under roller pressure. When you notice burn marks or ink seepage, replace the tube immediately to prevent pump damage.
In short, make sure you're using C4-size silicone tubing specifically designed for DTF white ink circulation pumps, and avoid running the pump continuously when not printing.
Addressing printer issues can be a complicated affair due to the hands-on nature of the problems. We aren't able to provide remote troubleshooting or support for printer repairs. However, we do offer an in-person evaluation and repair service through our local diagnostic facility (https://bchtechnologies.com/printer-repair-service). Please note that we operate on a first-come, first-served basis, and due to high demand, it may take a few weeks before we can receive your printer. Our services include full printer repairs or specific component repairs, depending on your needs.
If you prefer to handle it yourself, we encourage self-help and research online-especially through our YouTube channel (https://youtube.com/@bchtechnologies). On our channel's homepage, click the search icon next to "About" and type in your issue (e.g., "DTF pump tubing" or "white ink system"). With over nine years of videos, that's the most efficient way to locate tutorials. YouTube's algorithm may also recommend other helpful resources from the wider printing community.
Thank you again for your patience and support. We greatly appreciate your trust in BCH Technologies, and we're always here to help guide you through your DTF and printer repair challenges.