Case Study - How a Chunky Chili Sauce Producer Chose Pneumatic Piston Filler for Spout Bag
By:Salinovate Team
I. Customer Background
The protagonist of this case is a condiment company located in Tianjin, mainly producing various types of chili sauce. The target product to be filled by the required filling machine this time is chunky garlic chili sauce, which contains visible garlic paste particles and chili flakes. This chili sauce retains the traditional craftsmanship of "handmade feeling" and is deeply loved by consumers. Now the customer needs a small automatic spout bag filling machine to expand production appropriately for packaging 220g sauce. Finally, the customer chose the pneumatic piston filler and the following is the specific case study to show you the reasons.

II. Challenges and Needs
The customer's core requirements are very clear:
Requirement | Remark |
Particle integrity | The minced garlic and chili granules must not be damaged during the filling process. |
Filling speed | ≥20BPM |
Cost-effectiveness | Short investment return cycle, suitable for small and medium-sized enterprises. |
Simple to operate | Low worker training costs. |
III. Solution Selection: Why a Pneumatic Piston Pump?
During the selection of filling technology, we had in-depth discussions with the customer and compared two solutions:
Item | Servo Control Piston Pump | Pneumatic Control Piston Pump |
Filling volume control | Servo control | Pneumatic control |
Filling accuracy | ±0.5-1% | ±1-2% |
Filling speed | Single head piston pump filling system can meet 20-25BPM for 220g filling weight. | |
Price | Higher | Lower |
Particle Processing Capacity | Piston type is gentle on particles. | |

IV. Decision Basis
1) The customer's accuracy requirement is moderate (±3g is acceptable).
2)The target speed is 20-25 bags/minute, which single head pneumatic system fully meet.
3)Cost-effectiveness is key: pneumatic control type is cheaper.
4)The pneumatic piston exerts less pressure on the granules, ensuring granule integrity.
Ultimately, the customer selected a single-head pneumatic piston type spout bag filling machine(with capping function).
V. Equipment Configuration
Working Module | Configuration | Remark |
Filling system | Pneumatic piston pump | Relatively accurate measurement, gentle on particles. |
Filling nozzle | Drip-proof design | After filling, the nozzle is drawn back to prevent dripping. |
Bag sorting system | Manual bagging | Suitable for small to medium batches |
Screw cap system | Mechanical hand | The torque is adjustable to accommodate bottle caps of different sizes. |
Control | PLC touch screen | Simple to operate, workers can learn it in 10 minutes. |
VI. Test Performance
The filling machine underwent pre-delivery inspection testing at the factory; details can be found in our company news called Garlic Chili Sauce Spout Bag Fill Seal Machine Inspection Test Completed. The entire machine operated smoothly during testing, and the filling accuracy met the customer's requirements.
VII. Summary: A Cost-Effective Choice for Small and Medium-Sized Condiment Enterprises
This case demonstrates that servo control pump is not necessary in all scenarios. For the following situations, a pneumatic piston pump type spout bag filling machine is a better choice:
1)Sauces containing granules: disallow the damages to the granules
2)Filling speed requirement: 15-30BPM(depend on filling volume)
3)Limited budget: seeking high cost-performance
If you are also looking for spout pouch filling solutions for sauces containing granules, please feel free to contact us.



