Separation and texture damage pull the process in opposite directions
The line may need enough movement to keep oil and solids distributed, but excessive agitation or repeated pumping can change texture, release more oil or damage herbs and nuts. Mixer geometry, speed, dwell and low-level performance must be tested.
Record the largest nut or herb pieces, oil separation rate, product temperature and how the recipe changes through the batch. Consecutive jar checks should include solids and oil distribution as well as total fill weight.
Oil separation
Measure how quickly free oil rises and whether refill or pauses change the next doses.
Herbs and fibres
Audit long leaves and fibres through every valve, bend and nozzle.
Nuts and cheese
Check largest firm pieces, abrasion and damage through the chosen pump or metering route.
Surface smearing
Control nozzle withdrawal and cut-off to keep jar necks and sealing areas clean.
Choose the pack before finalising the filling machine
Container opening, stability, closure, sealing surface and decoration determine how the product can be presented, filled and transferred. Use commercial samples from the intended supplier and include dimensional variation in the trial.
| Pack route | Application considerations |
|---|---|
| Small glass jars | Common premium format; small openings can restrict pieces and demand accurate nozzle positioning. |
| Plastic pots | Allow wide access and foil or lid sealing, but flange contamination must be tightly controlled. |
| Pouches | Need stable opening and seal protection from oil migration and herb strings. |
| Foodservice tubs | Larger doses require stable containers, controlled product feed and practical lid application. |
Build the machine route from product feed to finished pack
Controlled agitation
Maintain the target distribution without turning the product into a different texture.
Open product path
Size valves, manifolds and nozzles around the largest pieces and fibres.
Low-shear pumping
Compare pump types and speeds using representative product before and after filling.
Oil-tight cut-off
Assess drips, smears and oil films on the pack finish or rim.
Dose and distribution checks
Record total fill plus oil and solids consistency across sequential packs.
Cleaning
Plan removal of oily residues, herbs and trapped particulates from all product-contact areas.
Closing, sealing, labelling and coding are part of the same acceptance test
Pesto jars may use screw or twist-off caps, while pots use foils or lids. Oil on the closure contact area can reduce seal quality or label adhesion. The line should include controlled headspace, clean cut-off, closure verification and enough conditioning time before decoration.
Agree measurable results for dose, presentation, closure or seal, label, code, reject handling and sustained output. A fast isolated filler cycle does not prove an integrated production line.
Scale automation from weekly demand—not headline speed
Convert saleable weekly demand into available production minutes, then allow for warm-up, replenishment, cleaning, changeovers, inspection, rejects and operator tasks. Desktop, compact, two-head and multi-head systems are planning bands rather than guaranteed capacities.
Desktop or semi-automatic
Manual pack presentation with assisted filling, capping or labelling. Prioritise flexibility and manageable cleaning.
Compact or two-head line
Coordinated conveyor stages, repeatable presentation and selected automatic feeding or closing.
Multi-head automatic line
Integrated container, closure, inspection and end-of-line handling with a defined acceptance run.
Representative trial checklist
Use the most difficult normal combinations—not only an ideal batch and pack.
- Highest and lowest oil separation tendency.
- Largest nuts, herbs and fibres.
- Full and low hopper levels.
- Start, middle and end of batch distribution.
- Product before and after pumping for texture comparison.
- Jar finish or pot flange cleanliness.
- Closure or seal result and leakage checks.
- Cleaning of oily and particulate residues.
Common questions
A piston or pump-based filler with suitable passages and controlled agitation may be assessed. The right option depends on solids, oil separation, texture, dose, pack and cleaning.
Use gentle agitation or circulation designed for the recipe and test performance at full and low product levels. Excessive mixing can damage texture.
Yes, provided the nozzle and product path pass the largest pieces and the jar opening allows safe clearance. Small jars also increase cap and label handling requirements.
Control product distribution, headspace, nozzle cut-off and pack transfer, then inspect the finish or flange before applying the cap, foil or lid.