RotoFormer was originally developed for TwinRoll Evolution, the latest generation of TwinRoll presses from Metso. Now this new pulp inlet device is available for upgrading the DPA, DPB and TRP TwinRoll presses.

Upgrading to RotoFormer yields a number of benefits. The increased vat angle of the press and improved pulp distribution and formation provide significantly greater capacity for a broad range of inlet consistencies while delivering greater washing efficiency. Upgrading to RotoFormer also minimizes the risk of plugging in the inlet device.

RotoFormer consists of a pulp inlet box and a rotating screw
The inlet box is open toward the roll surface. The screw maintains the flow of the pulp in the inlet box and its function is to distribute and form the pulp for optimal consistency and throughput. The special design of RotoFormer allows a pulp feed consistency between 3% and 11%, enabling capacity increases of up to 30%.

An upgrade includes RotoFormer, a new and improved spray pipe, longitudinal air seals and upgraded air pressurized end seals for presses with water adjusted end seals.

Upgrade information
RotoFormer is easy to install. It is bolted to existing holes on the press. Almost no modifications are needed for the DPB and TRPB presses, but some adjustments of the vat are necessary for the DPA and TRPA presses. Installation takes approximately three days for the DPB and TRPB presses, and five days for the DPA and TRPA presses. The main press drive and the pre-breaker drive may need to be upgraded to handle a capacity increase.