The continuous single-piston screen changer from Maag is based on the proven piston design with two screen cavities that operates without any mechanical seals. It sturdy construction, available in all sizes and designs, guarantees reliable and leak-free filtration of polymer melts for many years. An uninterrupted melt stream and an efficient degassing of the screen cavities allow continuous operation without any production interruptions. This screen changer is characterized by highest filtration quality with maximum system availability.
The large area screen changers from Maag are based on a proven dual piston design that does not require additional seals, and is equipped with application-specific filter elements. This design is ideal for applications requiring large area fine filtration. The seal cavities are tailor-made for the use of basket filters, Omega screens, disc and candle filters. Used are multi-layer filter media made of screen mesh and/or metal fiber fleece up to an active filter area of 15 m².
Maag’s duplex polymer filtration system was designed with considerable input from our customers. The result is a patented system that offers process benefits such as minimized residence time and improved heat transfer efficiency. By combining our modeling and technical Expertise of our patented slide valve design with a PLC controlled actuation, maag’s duplex filter systems can be designed to minimize viscosity losses during switchovers and provide seamless transfers.
Maag multinex filter candles are tailor-made for use in continuously operating dual bolt screen changers of the maag series CSC-P/C. Compared to typical round screen plates, they increase the active screening area up to 60 times, thus reducing significantly ΔP and the flux rate. At the same time, an up to 60 times longer service life of the filter until the next screen change is achieved.
Maag designed simplex systems can be provided with either fixed or removable vessels; a compact preheat station with spare vessel can be provided for locating near the line for quick changeout. They are custom designed to minimize initial pressure drop and maximize filter element life. Our proprietary sizing program, based on more than 20 years of experience in the field, incorporates your operating data to size each system for maximum performance and optimized flow while maintaining compact dimensions.
The discontinuously operating screen changer, equipped with a screen cavity, offers a robust and economic alternative for extrusion and compounding applications which permit a brief interruption in the melt flow when changing the screen. Thus, it is also ideal for batch applications during which an application- related shut-down of the unit permits a screen change after a batch is complete.
The compact single-piston screen changers SSC from maag pump systems provide an alternative for extrusion applications which allow for interruptions in the melt stream during screen changeover. SSC operate without any additional seal and their sturdy construction guarantees reliable and leak-free filtration of polymer melts. The rheologically optimized flow channel directs the melt flow optimally and with a short residence time into the screen cavity. The breaker plate is fitted with screen mesh suitable for the required filtration size. The screen changer is operated by a hydraulic piston.
Manual screen changers from maag have been the first choice of cost-effective filtration systems in extrusion lines for many years. Starting at size 45, the manual screen changers optionally come with transmission gearing. Here, the breaker plate is equipped with patented gearing and a pinion which allows an effortless screen change even in restricted space conditions or high sealing pressures. The manual screen changer guarantees the protection of gear pumps and fine extrusion die gaps from damage and dirt accumulation.
The Maag double-piston screen changer of the CSC-DV series is based on the proven piston design which requires no additional seals. This start-up screen changer combines all functions of a diverter valve and a continuous double-piston screen changers in a single compact unit. This results in a smaller installation dimensions and corresponding shorter residence time of the melt and lower heating requirements making this series to one of the most efficient machines in terms of capacity, spatial requirement, and heating.
Maag Backflush screen changers are based on the proven double-piston design which operates without any mechanical seals and is equipped with four screen cavities. This design is used mainly in recycling applications. Due to its fully automatic backflush function screen service life is maximized and the level of automation of the entire system is increased. Reduced operating costs and an enormous system availability are the main characteristics of this series. The sturdy construction guarantees reliable and leak-free filtration and backflush performance of polymer melts for many years.
Maag area-optimized continuous screen changers are based on the proven double-piston design. Thanks to the optimized oval-shaped screen cavity the available Screen area relative to the piston diameter is maximized resulting in an extreme compact design of these proven machines. With its minimized residence times of the polymer melt and the significantly lower heating requirement due to its compact design, the CSC-PE from maag stands for maximum efficiency and guarantees reliable and leak-free filtration of polymers for many years.
The new generation side plate screen changers come as a standard equipped with a pressureadaptive sealing system. Depending on the system, the required sealing forces are adapted to the melt pressure present. During a screen change procedure one of the screen cavities is always in the melt stream. After a screen change, the screen cavity is flooded thus ensuring a screen changeover without production interruption.