Engineered to eliminate limitations.
Built to perform.
The TOFLOW PDS pump solves the classic problems of twin-screw pumps —vibration, overheating, and complex maintenance— with a hygienic, precise design that's easy to service.
One single pump for your entire process
The PDS adapts to a wide variety of products and processes, from ultra-viscous concentrates to low-viscosity liquids.
Gentle yet powerful handling
The axial transport principle ensures extremely low pulsation, even at maximum pressure, protecting the most delicate products without sacrificing performance.
Hygiene built in
Mechanical seals fully flushed under constant pressure, with no dead zones or cavities, and a design ready for full sterilization (CIP/SIP).
Simplified maintenance
Quick seal and screw replacement from the front of the pump. Premium materials and smart design for a longer service life with less downtime.
Extreme versatility
Transfers everything from thick concentrates to thin liquids, even with entrained air, with low NPSH and across extreme temperature ranges.
Eliminates the CIP pump
Performs cleaning-in-place with the same pump, no additional equipment needed —saving time, space, and cost.
Efficiency under pressure
Maintains efficiency even under high differential pressures without overheating, thanks to its solid shaft and tight internal tolerances.
Advanced engineering in every detail
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Sophisticated three-piece casing
Seal housing, screw casing, and pump cover, designed for maximum flexibility and easy adaptation to system requirements.
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Semi-cartridge mechanical seals
Fully immersed in the product flow, available in single or double configuration, with front-loading replacement in just a few steps.
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Especially solid shaft
Engineered for maximum rigidity at its critical diameter, reducing heat buildup and extending the pump's service life.
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Sophisticated gearbox
Oversized bearings, constant oil circulation lubrication, and a removable cover for direct access without moving the pump.
The right screw for every application
Screw pitch determines performance: smaller pitches withstand higher pressure and reduce NPSHr, while larger pitches maximize flow rate.
Fine pitch
Standard pitch
Medium pitch
Wide pitch
High flowBuilt for the food and beverage industry
From the lab to the production line, the PDS series and its compact DOSY version cover the full range of processes.
Dairy & concentrates
Gentle handling of shear-sensitive products such as cheese, yogurt, cream, and whey or fruit concentrates.
Beverages & syrups
Pulsation-free transfer of syrups, concentrates, and beverage bases, with excellent dosing behavior.
Sauces & purées
Ideal for products with particulates or high viscosity, protecting product integrity during pumping.
Integrated CIP/SIP
The same process pump performs cleaning and sterilization in place, with no additional equipment.
Precision dosing
The DOSY version handles flow rates from 5 L/h to 900 L/h for laboratory, pilot plant, and specialty production applications.
High differential pressure
Stable performance in low suction pressure or high discharge pressure applications, without overheating.
TOFLOW PDS series specifications
Information subject to ongoing product range development. Contact TOFLOW for special requirements.
| Model | PDS 1 | PDS 2 | PDS 3 | PDS 4 | PDS 5 |
|---|---|---|---|---|---|
| Max. discharge pressure | 25 bar (363 psi) | ||||
| Max. flow rate | 20 m³/h (88 gpm) | 40 m³/h (176 gpm) | 100 m³/h (440 gpm) | 250 m³/h (1,100 gpm) | 500 m³/h (2,200 gpm) |
| DN connection | 15–50 mm | 40–80 mm | 65–150 mm | 80–200 mm | 100–300 mm |
| Max. speed | 3,600 rpm | 2,800 rpm | |||
| Viscosity | 0.5 to 1,000,000 cP | ||||
| Rotation | Clockwise or counterclockwise | ||||
| Max. temperature | 150 °C standard (220 °C special version) | ||||
| Gasket materials | FKM, EPDM, HNBR and FFKM | ||||
| Mounting | Horizontal (B3) standard; vertical optional | ||||
| Mechanical seals | Single or double (flushed or pressurized) | ||||
| Contact materials | AISI 316L | ||||
Source: TOFLOW PDS technical data sheet. Values subject to change depending on configuration.
| Model | PDS DOSY |
|---|---|
| Max. discharge pressure | 10 bar (145 psi) |
| Max. flow rate | Product: 5–900 L/h (1.3–238 gph) · CIP: 3 m³/h (13.2 gpm) |
| DN connection | 10–40 mm (0.39–1.57 in) |
| Max. speed | 4,000 rpm |
| Max. particle size | 12 mm (0.47 in) |
| Screw pitches | 6 sizes available |
| Connections | Standard Tri-clamp, others available |
| Viscosity | 0.5 to 1,000,000 cP |
| Rotation | Clockwise or counterclockwise |
| Max. temperature | 150 °C standard (220 °C special version) |
| Gasket materials | FKM, EPDM and HNBR |
| Mounting | Horizontal (B5) standard; vertical and sideways optional |
| Mechanical seals | Single or single flushed |
| Installation | Self-supporting standard; baseplate optional |
Ideal for laboratory, pilot plant, and high-precision specialty production.