The Pannevis GT gas-tight filter from Larox is a completely enclosed design that can continuously process virtually any solvent based product in a sealed housing, while operating under a continuously re-circulated nitrogen or other inert gas blanket. The filter housing is also designed to easily meet cGMP (current Good Manufacturing Practice) making it especially suitable for pharmaceuticals and biotech products.
Gas tight filters are currently used for many pharmaceuticals, both intermediate and final, as well as fine chemicals, bio-products, solvent-processed foodstuffs, solvent wetted organic solids, and pyrophoric materials. With over 120 production scale units installed worldwide, Larox is the world leader in solvent-based vacuum belt filtration with the Pannevis GT filter.
Pannevis GT filters offer all the advantages of the standard RT filter including co- or counter-current washing, reflux washing, vibration, all forms of mechanical compression and either hot gas or infra-red drying. They can be configured in many different combinations of the above options for multi-step processing exactly as the standard RT filters.
The housing is normally operated with a few millimeters of water gauge over-pressure inside. The nitrogen is pulled from the housing during the vacuum stroke by the vacuum pump, where the condensate is removed, and the “dry” nitrogen is then returned to the housing. A very small make-up of nitrogen is required to compensate for nitrogen exiting with the wet filter cake.
The floor and roof of the housing are rounded while the sidewalls are flat. This ensures easy cleaning. Hinged windows in the sides and lights in the roof ensure complete visibility. The windows also provide local access within the housing. Clean-in-place (CIP) is a standard option and the standard filter is designed for sanitary operation as all dead spots are eliminated, windows and nozzles are angled to drain back into the housing and internal surfaces can easily be polished to a specified level.
As with all RT filters, the RT-GT filter is extremely reliable and maintenance is simple. All the major maintenance items including the cloth drive and bearings, air cylinders and cloth tracking actuators are mounted outside the housing, so it is not necessary to access the inside of the filter for normal scheduled maintenance. Where internal access is required for things such as cloth change or replacement of cloth tracking rollers, access is via the windows or large diameter man-ways in the filter housing or via removable housing end panels.
Larox is now Outotec!
Now, Outotec’s expertise in minerals and metals processing is merged with Larox’s expertise in solid-liquid separation. The new dream team offers innovative and sustainable solutions and services for the whole value chain from mine to metal and chemical process industries. The dream team is the winning formula to customers, as Larox’s filtration solutions and services complete perfectly Outotec’s solution and service offer.
Outotec innovates, develops and delivers sustainable technology and service solutions to minerals, metals, chemical and energy industries.
Outotec collaborates lifelong with its customers in order to optimize the utilization of raw materials and energy efficiency as well as to minimize
the environmental impact and operating costs.
Outotec develops, designs, manufactures and supplies industrial filters and is a leading technology company in its field. Outotec is a full service filtration solution provider in solid and liquid separation. Comprehensive aftermarket services throughout the lifespan of the Outotec solution form an essential part of our operations. Companies in Mining and Metallurgy, Chemical Processing and related industries benefit from our high-efficiency process technologies, products and solutions.
Outotec provides its clients with an unrivalled combination of process expertise and service. Outotec delivers complete solutions, which exceed the goals for product quality, yield, value and consistency. Outotec helps its clients to simplify their production processes, improve the profitability of the processes and help to save energy in an environmentally friendly way. All solutions are designed for application-specific needs to meet all process performance requirements of clients and their customers.