P-01
Fruit and vegetable purées
Often pumpable but non-Newtonian, with pulp, fibres and temperature-dependent viscosity.
- Ask first
- Viscosity curve, pulp content, fibre length
- Watch
- Fouling, pressure drop, texture change
Applications / product fit
Tube-in-tube sterilizer applications for viscous and particulate foods.
Purée, paste, sauce and concentrate are useful market labels, but equipment fit depends on measurable properties: rheology, particles, fibres, fouling, heat sensitivity, corrosion risk and the required process.
P-02
Tomato paste and concentrates
Concentration, Brix, temperature and shear history can materially change flow behaviour.
- Ask first
- Brix, rheology method, inlet condition
- Watch
- Burn-on, pump duty, product recovery
P-03
Sauces, soups and prepared foods
Formulations may combine a viscous carrier with discrete pieces that must survive pumping and thermal treatment.
- Ask first
- Particle dimensions, concentration, hardness
- Watch
- Passage clearance, residence distribution, separation
P-04
Jams and fruit preparations
Sugar, solids, pectin and fruit pieces can influence heat transfer, viscosity and cleaning demand.
- Ask first
- Soluble solids, pieces, gel behaviour
- Watch
- Local overheating, fouling, finish temperature
P-05
Pulp-rich juices and beverages
Fibres or soft particles may rule out narrow passages even when the liquid phase is not highly viscous.
- Ask first
- Pulp percentage, fibre length, particle distribution
- Watch
- Settling, shear, downstream filler clearance
P-06
Other pumpable formulations
Dairy desserts, plant-based products and liquid foods with particulates may be candidates after a product-specific review.
- Ask first
- Full formulation class, allergen and fouling profile
- Watch
- Cleaning segregation, protein or starch deposit
Particle fit
“With particles” is not an engineering specification.
Describe the largest particle in three dimensions, not only a nominal diameter. Include shape, concentration, hardness, fibre length, breakage sensitivity and whether the product can be sampled.
Shape
Fibre
3 axes
Passage fit is only one check.
Pump clearance, pressure drop, heat penetration, residence time, filler interface and desired particle integrity all belong to the decision.
Screening matrix
Early signals for technology comparison
| Product signal | Tube-in-tube review | Comparison question | Evidence still needed |
|---|---|---|---|
| Viscous, pumpable, limited solids | Candidate to evaluate | Which geometry manages pressure drop and run length? | Rheology curve and fouling trial |
| Fibres or soft particulates | Geometry-specific candidate to evaluate | Which passage and pump protect clearance and integrity? | Three-axis particle distribution |
| Low-viscosity homogeneous liquid | One option to evaluate | Which concept meets the duty and project economics? | Run length, pressure and economics |
| Large, hard or fragile pieces | Fit unknown without product evidence | What passage, pump and filler clearances are required? | Integrity target and sample trial |
| Severe burn-on tendency | Fit unknown without run-length evidence | What test can compare viable heating concepts? | Representative sample testing |
This matrix is a planning aid, not a performance guarantee or process validation.
Fit starts with a sample description
Tell us what must pass through the tube intact.
Product data and representative samples make the first equipment conversation faster and more responsible.
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