How to Choose a Liquid Packaging Machine – 5 Key Questions

From water-thin to honey-thick – a quick guide for buyers

      Not all liquid packaging machines are the same. The wrong choice leads to leaking bags, inaccurate fills, and constant downtime. Use these 5 questions to find the right machine for your liquid.

1. What is your liquid’s viscosity?

Viscosity Example Recommended Filler
Low (like water) :Water, alcohol, oil Gravity or electromagnetic pump
Medium (like honey): Shampoo, ketchup Piston pump with suck-back
High (like paste): Glue, peanut butter Large piston pump + heating

2. What bag type and speed do you need?

· Bag types: Back seal, 3-side seal, stand-up pouch, spout pouch.
· Speed: Low (<30 bags/min) = pneumatic control. High (>60 bags/min) = servo-driven.
· Gas flushing: Needed for oxygen-sensitive liquids (juice, oil).

3. How often do you clean or change products?

· Same product daily: Removable hopper and pipes are enough.
· Frequent flavor/color changes: Choose clamp connections – no tools needed.
· High hygiene (dairy/pharma): Must support CIP (Clean-in-Place).
· Material standard: Food/pharma requires 304 or 316L stainless steel + FDA seals.

4. Does the machine prevent dripping and ensure accuracy?

· Anti-drip: Must have suck-back or cut-off function after each fill.
· Accuracy: Aim for ±1% or better.
  · Low viscosity → electromagnetic flow meter
  · Medium/high viscosity → servo piston pump
· Optional: Online checkweigher for automatic correction.

5. What after-sales support does the supplier offer?

Before ordering, confirm:

· ✅ Can you test my actual liquid sample on the machine?
· ✅ Do you provide CE or other required certifications?
· ✅ Are spare parts (seals, nozzles, valves) quickly available?
· ✅ Do you offer remote video support?

Get a Recommendation for Your Liquid

     Guangzhou Penglai Packaging Machinery Co., Ltd offers a free liquid packaging machine assessment.