Low-Shear Transfer for Next-Gen Plant Proteins: The FDS Twin Screw Pump Advantage
March 21, 2026
Next-gen plant proteins demand a level of handling precision that most production lines aren't built for. And it's not the one most people assume. Consumers want the chew, the bite, the fibrous pull of real meat. Getting that right is far harder than it looks. Because it's not just about the recipe. Itโs about how you physically move the protein through the production line that matters just as much as what goes into the formulation.
Most processing lines still rely on progressive cavity pumps or gear pumps. These traditional options generate high-shear forces that physically tear apart the long-chain molecules in pea or soy protein isolates. The result is denatured protein, ruined texture, and a product that falls flat on the shelf. Switching to a twin screw pump setup isn't just an equipment upgrade. For next-gen protein manufacturers, it's basically a product quality decision..
Working Principle of Screw Pump Technology
A twin screw pump uses two intermeshing screws that rotate inside a sealed cylindrical casing. The screws don't actually touch each other or the casing walls at any point. Instead, they create a series of closed cavities that carry the product axially, meaning straight forward along the length of the screw.
Think of it like a continuously moving seal. The product doesn't get flung outward. It doesn't get spun around. It travels forward in a near-pulsation-free flow, gently, without much mechanical interference. This axial movement is fundamentally different from lobe or centrifugal pumps, which push liquid outward in radial paths and introduce shear in the process. For plant proteins with fragile molecular structures, that difference translates directly into product quality.
Key Differences between Twin Screw Pump Types for Food Processing
Not every twin screw pump suits food processing environments. The category is divided into industrial and hygienic variants. Choosing incorrectly creates contamination and compliance risks. Industrial pumps focus on pressure and flow. Hygienic designs prioritise sanitation and cleanability. Understanding this difference early helps manufacturers avoid serious problems later.
| Parameter | Industrial Twin Screw Pump | Hygienic Twin Screw Pump (Fristam FDS) |
|---|---|---|
| Rotor Design | Contacting screws mesh under pressure | Non-contacting rotors, no metal-to-metal contact |
| Contamination Risk | Higher, due to rotor wear and contact | Minimal, eliminates metal particle risk |
| Typical Industries | Oil and gas, chemicals, marine | Food, beverage, dairy, pharma, plant-based proteins |
| Hygiene Certification | Not applicable | 3-A and EHEDG certified |
| CIP Capability | Limited or absent | Full CIP and SIP compatible |
| Shear Level | Moderate to high | Low, preserves product integrity |
The "2-in-1" Advantage of the FDS Twin Pump
A standard twin pump configuration in most plants requires separate equipment for production runs and cleaning cycles. That means extra piping, more maintenance points, and capital sitting on the floor earning nothing for a big chunk of the working day.
The twin screw pump in Fristam's FDS series does both jobs with a single unit. At lower RPMs, it moves dense viscous protein pastes and emulsions smoothly across the line. Crank up the speed, all the way up to 3,600 RPM, and that same pump handles thin CIP cleaning fluids with viscosity as low as 1 cP. No separate bypass lines needed. No secondary pump installation. The FDS series accommodates viscosities from near-water all the way up to 1,000,000 cP, covering everything from protein-infused beverages to thick peanut-style protein doughs.
Precision Dosing: The FDS Nano Twin Screw Pump
Scaling the main protein transfer line is one challenge. But what happens at the additive dosing stage? Lab-grown fats, natural heme compounds, precision enzymes, and concentrated flavour systems all require micro-dosing with almost zero margin for error. Overdose and you waste expensive ingredients. Underdose, and the product formulation is off. A standard pump simply doesn't carry the sensitivity for this kind of work.
The FDS Nano Twin Screw Pump from Fristam is developed specifically to fill this gap. The nano twin screw pump delivers flow rates as low as 5 L/h, scaling up to 500 L/h depending on process requirements. Despite its compact footprint, it handles viscosities up to 1,000,000 cP with the same gentle, low-shear transfer as the larger FDS units. The dosing accuracy makes it highly reliable not just for full-scale production but also for small-batch R&D work where formulation consistency is absolutely critical.
Fristam designed it as the world's smallest twin screw pump, and that's not a marketing claim. The size reduction comes without compromising precision, hygiene, or performance. CIP is supported within the same unit, which keeps sanitation workflows simple even at the micro-dosing stage.
Critical Twin Screw Pump Applications in Plant Protein
The twin screw pump applications across a plant-based protein facility actually span more of the production line than most process engineers initially account for:
Extruder Feeding: Delivers steady, pulsation-free flow directly to twin-screw extruders. Consistent inlet pressure is what drives consistent fibre formation in textured protein products. Any pulsation here causes visible defects in the final structure.
Emulsification Transfer: Plant-based fat and protein emulsions are delicate. A high-shear pump breaks the emulsion bond during transfer, and you won't get it back. The Fristam Twin Screw Pump series keeps the bond intact all the way to the next stage.
Filling and Packaging: Final products like chunked stews, high-protein spreads, or plant-based dairy often contain solid particulates. The twin screw pump moves these gently without crushing or product loss.
CIP Fluid Handling: The same pump handles line cleaning without any auxiliary equipment. In many facility configurations, this eliminates a dedicated CIP return pump.
Enzyme and Additive Dosing: Handled precisely by the FDS Nano at flow rates that the main pump line simply can't match.
Conclusion
The plant-based protein market isn't slowing down, and neither are the quality standards that come with it. What worked for first-generation products won't survive the consumer expectations of what's coming next. From raw slurry to final fill, your line needs to handle protein as carefully as your formulation team does.
The twin screw pump from Fristam's FDS series brings together gentle handling, high-pressure capability, CIP versatility, and precision dosing into one certified, hygienic platform. Whether you're running a large-scale extrusion line or fine-tuning a new formulation at bench scale, there's an FDS configuration that fits your process..
Ready to upgrade your transfer process? Explore the full FDS series and find the right pump for your facility at Fristam.
Frequently Asked Questions
1. How is a twin screw pump better than a centrifugal pump for plant protein processing?
Yes, it will. Shear breaks down the fibrous protein chains that give plant-based products their texture, and most conventional pumps do exactly that. The FDS series eliminates this problem by handling the product gently, which means less denaturation and a more consistent final product.
2. Will switching to a twin screw pump actually improve my product quality?
Yes, it will. Shear breaks down the fibrous protein chains that give plant-based products their texture, and most conventional pumps do exactly that. The FDS series eliminates this problem by handling the product gently, which means less denaturation and a more consistent final product.
3. How easy is it to clean and maintain the FDS twin screw pump on a busy production line?
The FDS series is fully CIP and SIP compatible, so it cleans itself as part of your existing sanitation routine without needing to be dismantled. Front-loading seals make any manual maintenance quicker and simpler. Most facilities find it significantly reduces downtime compared to older pump setups./p>
4. Can one pump handle both my production and cleaning cycles?
Yes, and that's one of the biggest operational advantages of the FDS series. The same pump handles thick protein pastes during production and switches to thin CIP cleaning fluids by simply adjusting the speed. It removes the need for a separate CIP pump, which saves floor space and reduces overall maintenance costs.
5.Is a twin screw pump suitable for small batch or R&D production?
Absolutely. The FDS Nano Twin Screw Pump from Fristam is specifically built for low flow rate applications, starting from as little as 5 L/h. Its precise dosing capability makes it ideal for R&D environments where formulation accuracy matters and expensive additives can't afford to be wasted.
