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Controlled Tomato Particle Reduction and Continuous Sauce Depositing with Fristam FS Shear Technology

Eliminating Depositor Blockage and Production Downtime Through Inline Retrofit Blending

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Introduction to the application and industry overview

Industrial production of pizza sauces, ready-meal tomato bases and food-to-go sauce components requires accurate control of tomato particle size, viscosity and solids suspension to ensure reliable depositing and consistent finished-product appearance. Oversized vegetable particulates can block depositing nozzles, filling heads or dosing systems, creating inconsistent throughput that caused 250 hours of unplanned downtime annually.

Inline rotor-stator shear blending enables repeatable particle size reduction without over-shearing viscosity, supporting continuous hygienic processing and stable depositing performance across large-scale sauce manufacturing.

Customer brief

A pizza manufacturer producing tomato sauce for continuous depositing was forced to stop production multiple times each day to clear tomato pieces that were too large for their sauce depositing machine. These interruptions caused downtime, labor disruption and reduced line efficiency, creating pressure to find a reliable particle-size-control solution.

The processor wanted to find a way to modify their current system to reduce large tomato chunks while maintaining the desired sauce body and viscosity, avoiding the common problem of turning the sauce into an overly thin liquid.

Fristam FSP shear blender, US version

Fristam’s solution

Fristam recommended integrating an FS shear blender with a 3521-rotor stator combination into the existing sauce transfer system. With this configuration of rotor-stator design intermeshed teeth generated controlled mechanical shear and turbulence, which enabled predictable tomato particle size reduction, without pureeing – preserving the sauce viscosity and body.

Trial set-up

1. Tomato sauce was transferred through the existing line using a Fristam positive displacement pump feeding a batch tank.

2. The Fristam FS 3521 Shear Blender was installed inline within the current blending and transfer configuration.

3. Sauce passed through the rotor-stator shear zone, where oversized tomato particles were uniformly reduced.

4. Shear intensity was controlled to ensure particle reduction without viscosity loss or over-processing.

5. The processed sauce was delivered to the depositing machine for operational evaluation.

6. Continuous production confirmed stable depositing, consistent texture and elimination of blockage-related downtime.

Fristam’s solution

A successful outcome with the Fristam FS Shear Blender

The FS Shear Blender successfully reduced tomato chunk size while preserving sauce consistency, preventing pieces from obstructing the depositing machine. As a result, production interruptions were eliminated and the manufacturer achieved significant uptime improvement, with an estimated at 250 hours of downtime saved annually.

Impressed by the consistency, reliability and operational savings, the processor proceeded to install multiple FS Shear Blenders across the facility, ensuring long-term performance in pizza sauce production.

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Sustainability benefits

Sustainability benefits

  • Reduced product waste from interrupted processing
  • Lower energy consumption linked to downtime and restart cycles
  • Efficient use of existing processing infrastructure
Financial benefits

Financial benefits

  • Elimination of daily production stoppages
  • Estimated 250 hours of downtime saved per year
  • Improved line efficiency and labor utilization
  • Cost-effective inline retrofit rather than full system replacement
Other benefits

Other benefits

  • Hygienic inline design compatible with food manufacturing standards
  • Seamless integration with positive displacement pumping systems
  • Proven scalability for ready-meal, sauce and food-to-go production lines
  • Strong value proposition for OEMs, system integrators and project engineers
Process / Product quality benefits

Process / Product quality benefits

  • Controlled tomato particle size reduction without over-shearing viscosity
  • Stable sauce body, texture and solids suspension
  • Reliable continuous depositing performance
  • Repeatable product consistency across production batches

Similar applications

  • Controlled inline shear blending is widely used across tomato-based sauces, ready-meal fillings and food-to-go condiments where particle size must remain below depositor or dosing limits while maintaining authentic texture and mouthfeel.
  • Comparable requirements occur in pasta sauces, curry bases, salsa-style toppings and vegetable-inclusion sauces, all of which depend on uniform solids distribution and stable viscosity for automated filling.
  • Beyond sauces, similar particle-control challenges exist in prepared meal components, soup inclusions and protein-based ready-meal systems, where continuous depositing reliability and hygienic processing are essential for high-volume manufacturing.

In addition to Mixing & Blending Technology – check out Fristam’s full range of Pumping Technologies suitable for the Food Industry.

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