FDS – TSG
Twin Speed Gearbox

The Fristam FDS-TSG is a twin-screw pump with an integrated twin-speed gearbox (TSG). This unique gearbox allows the pump to operate efficiently at both low and high speeds, handling thick product during production and thin liquids during CIP, using a smaller motor and less energy than conventional methods.

The TSG features a integrated gearbox with two gear pairs and extended shafts. During product production phases, it runs at a low gear ratio (1:0.5). During CIP, the system switches to a high-speed gear ratio (up to 1:2.0), all while maintaining a single direction of flow.

The twin-speed gearbox enables the FDS-TSG to pump both high-viscosity products and low-viscosity CIP media with a smaller motor. It eliminates the need for oversized motors or costly servo drives, reducing energy use by up to 45% in production and delivering significant cost and CO₂ savings.

The FDS-TSG offers a wide speed range (95–3,000 rpm) and a dual gear ratio that enables precise low-speed metering for viscous products and high-speed flushing for CIP. This makes it ideal for dual-use applications in hygienic industries, improving flexibility while reducing costs.

Yes. The FDS-TSG can handle both production and CIP flows with a single pump. Its twin-speed gearbox allows seamless switching between low-speed product transfer and high-speed CIP cleaning, eliminating the need for separate equipment and reducing footprint and capital expense. However, it should be noted that an ordinary FDS pump is also capable of this.

The FDS-TSG handles flow rates from extremely low (for precise dosing) to over 50 m³/h during CIP. It is suitable for a wide viscosity range—from water-thin liquids to sticky, non-flowing masses, like caramel, pastes or suspensions with entrained air.

Thanks to its gear ratios, the FDS-TSG works with a smaller standard motor (e.g. 11 kW, 8-pole) and a compact frequency converter. It achieves high cleaning speeds and low production speeds without needing a larger motor or external fans, which can be required when switching between such different mediums.

Absolutely. The FDS-TSG is manufactured from 316L stainless steel and designed according to EHEDG principles. It supports full CIP and SIP cleaning with no dead legs, making it ideal for food, dairy, pharma, and biotech production environments.

No. Unlike the standard Fristam FDS, the FDS-TSG always pumps in a single direction. The flow direction remains the same in both production and CIP modes.

In a typical two-shift operation, switching to an FDS-TSG can cut annual electricity use by over 10,000 kWh, saving more than €2,500 and reducing CO₂ emissions by over 5,300 kg per year—without compromising performance.