Metso has launched the Metso GFF Series™ flip-flow screens, engineered for efficient fine dry screening of difficult and often moist materials. The rugged design delivers stable classification in demanding conditions and enables finer cut sizes required in applications such as sand manufacturing in aggregates segment and high-pressure grinding rolls (HPGR) based closed circuits in mining segment. By strengthening the screening stage, the GFF Series helps customers improve energy efficiency, reduce circulating loads and lower water usage, enhancing productivity in fine product making and comminution processes.
Credit: Metso
Metso GFF Series flip-flow screen
The improved screening performance delivers value in two key areas. In HPGR and downstream grinding circuits, finer and more accurate classification reduces circulating loads and improves overall energy efficiency. In fine aggregate production, high screening efficiency minimizes cross-contamination, supporting consistent product quality, for example in sand manufacturing.
Stable dry screening with improved water efficiency
The GFF Series combines hybrid flip-flow and conventional deck technology with high excitation forces to deliver precise screening in both dry and wet conditions. It achieves cut sizes down to 0.5 mm in dry applications and 0.3 mm in wet applications, while minimizing blinding and pegging. Compared with traditional screening solutions, this results in higher efficiency, reduced process water demand and less energy wasted in downstream grinding, enabling more efficient flowsheet design.
Practical field performance has been a key design driver. The flip-flow deck’s anti-blinding behavior reduces unplanned stoppages, while straightforward access, rugged construction and easy serviceability support faster maintenance, higher availability and a lower total cost of ownership.
Michael Gyberg, Vice President, Screening Equipment Solutions, says:
“Our customers have been asking for a high-performance screen that can handle fine, difficult and often moist materials without forcing them into wet screening. The GFF flip-flow delivers the finer, more accurate cuts needed to support HPGRs and the overall comminution process, making the screen a true enabler of circuit performance.”
Beyond mining and aggregates, large-scale fine dry screening also opens new opportunities in applications such as biomass, fertilizers, construction waste recycling and industrial minerals.
More efficient HPGR circuits
Classification plays a critical role in HPGR flowsheets, influencing energy consumption, circulating loads and productivity. The GFF Series widens the technical envelope for fine cut sizes and throughput, enabling more accurate classification ahead of downstream grinding. The resulting finer particle size distribution improves the efficiency of the entire circuit.
Stefan Sakendorf, Director, HRC products, Metso, adds:
“The much finer screen cuts achieved with flip-flow technology are a major advantage for future HPGR circuits. More accurate classification allows a greater share of the workload to be handled by energy-efficient HPGRs and strongly supports the implementation of highly efficient HRC™e–Vertimill® circuits.”
Expanded screening portfolio and full flowsheet solutions
The GFF Series further expands Metso’s screening portfolio and strengthens its end-to-end comminution offering. Following the introduction of the Grande Series screens in 2025, Metso now offers fit-for-purpose solutions ranging from coarse, high-capacity applications to demanding fine dry screening.
Combined with Metso’s screening media, lifecycle services, HRC™e HPGRs, grinding mills and digital tools, the GFF Series positions Metso as a full flowsheet partner for customers seeking higher productivity, lower energy consumption and reduced water dependency.