Bottom line: pistons excel at repeatable volume for viscous products; pumps excel at flexible flow control and handling tricky products with the right pump type.
Piston Filling
Pistons dispense a set volume per stroke—great for thick, consistent products where repeatability matters.
Pump Filling
Pumps move product continuously. Choosing the right pump type (gear, lobe, peristaltic, etc.) is key for viscosity and particulates.
Quick Comparison
| Factor | Piston | Pump |
|---|---|---|
| Best for | Viscous, consistent products | Wide product range with correct pump |
| Particulates | Possible with proper valve/nozzle | Often better with lobe/peristaltic |
| Cleaning | CIP-friendly designs available | Depends on pump; sanitary pumps simplify |
| Changeover | Fast for similar products | Good for multi-product lines |
Inputs we need for an accurate quotation
- Product state and behavior (powder flowability, viscosity, particulates, temperature)
- Package format and size range (bag/bottle/jar; material and seal type)
- Fill range and target tolerance (e.g., 100–500 g, ±1–2 g)
- Target output (units/min or hr) and expected runtime per day
- Local utilities (voltage/phase/frequency, compressed air, clean-room/hygiene level)
- Photos or sample pack + label requirements (if any)
Factory acceptance test (FAT) checklist
- Run with your product or a confirmed substitute and record output stability
- Check weight accuracy vs tolerance at different speeds
- Verify sealing integrity (leak test / visual inspection) across a full shift simulation
- Confirm safety, emergency stop, guards, and basic alarms
- Capture test video and final configuration list for handover
Frequently Asked Questions
Which is better for thick sauce?
Often piston, but sanitary lobe pumps can also be excellent depending on the product and cleaning requirement.
Can pumps handle particulates?
Yes, with the right pump type (e.g., lobe) and proper piping/nozzle design.
Which is easier to clean?
Both can be sanitary. The best choice depends on your CIP needs and product stickiness.
What information do you need?
Viscosity, temperature, particulates, container type, target speed, and cleaning method.