Efficient lightweight board making with OptiFlo Gap headbox
Valmet's OptiFlo Gap and OptiFlo Layering Gap headboxes provide:
One or two-layer gap forming headbox for efficient lightweight board making
The new OptiFlo headbox family brings together our unrivaled expertise and new technology, opening the door to improved quality and increased productivity in all forming applications. Valmet’s high-performance headbox is an ideal solution for single- and two-layer applications, in order to meet today’s high boardmaking demands on containerboard production.
High-performance headbox for demanding gap forming applications
The key elements of the OptiFlo Gap headbox are its completely redesigned headbox turbulence generator and a slice channel built using composite wedge technology. These innovations allow a consistent and disturbance-free slice jet. The key objectives of the OptiFlo Gap headbox are first to achieve optimal fiber suspension fluidization and then to maintain this optimal fluidization without disturbance across the forming section.
Experiences from several production machines show that homogenous slice jet quality yields excellent board properties. This gap forming headbox design maximizes the utilization of raw material strength potential, which enables the use of more cost-effective raw materials.
Excellent layer coverage as a result
Top side view of brown (40 gsm) on grey (40 gsm) linerboard sample, total 80 gsm.
The two-layer OptiFlo Gap headbox delivers good layer coverage. All hydraulic components of the headbox have been designed to minimize slice jet and board sheet disturbances to reach this. Valmet’s high-performance headbox provides a robust hydraulic performance and excellent board properties with uniform basis weight and fiber orientation profiles within an extended operating window. This means increased operating performance and adaptability to varying production conditions. OptiFlo II and OptiFlo Pro headbox applications are available under the renewed names OptiFlo Layering Gap headbox and OptiFlo Gap headbox.
|OptiFlo Gap at SAICA PM11, UK:
The record-breaking start-up speed was 1,105 m/min with a basis weight of 95 g/m2. Three days later the first sellable paper reels were produced and tested, reaching the first customer shortly afterwards.
Customer succes stories
The intelligent giant - Bohui Zibo BM6
A giant was born when Bohui started their new BM 6 – the widest and largest of its kind in Asia. From the initial start-up to the conversion to printing paper production, machine optimization has been supported from Valmet’s Performance Center.
Saica’s PM 11 breaking records from the kick-off
Valmet’s OptiConcept containerboard machine in UK is breaking world speed records from the beginning and production started 15 days earlier than originally planned.
Mondi Świecie ECO7:Economy meets ecology
“I see Mondi Świecie emerging as the preferred solutions provider for containerboard in Europe. Customers will automatically identify it as the best supplier, and competitors will identify it as the best benchmark,” says Maciej Kunda, CEO of Mondi Świecie SA.
Responsible packaging at Orora B9
Orora's Botany mill in Australia is home to one of the world's top-performing paper machines. Replacing old machines with Valmet paper machine has slashed energy use by 34%, cut water consumption by 26% and reduced waste by 75%.