© Chip silo © Plug screw ® Blow back valve (S) Digester © Discharge Screw / Feed Screw © Pressurized Refiner ® Main Motor Disc diameter Throughput capacity* Disc diameter Throughput capacity* 'Throughput capacities are based on chip bulk density of 180 kg b.d./m3 and may vary depending on wood species and fiber quality

High performance Only the best available solution on the market is good enough to serve our customers For more than a century, Pallmann has been developing and building machines for the size reduction industry. Pallmann’s market leading position is a result of our philosophy to provide our customers efficient and at the same time precise, robust and long lasting machines and complete systems. Application The Pallmann Refining System PR produces high quality fiber for MDF/HDF and insulation boards made out of wood chips, sawdust and shavings as well as annual plants. Pallmann Refiner Systems reflect...

Blow back valve Opposite to the plug screw the blow back safety valve seals the digester when no plug is available. During operation it splits and loosens the plug formed by the plug screw. The blow back safety valve system is operated by a solid steel pneumatic cylinder for control of counter pressure to the plug screw feeder. Digester vessel The digester is made of stainless and acid proof steel according to the applicable pressure vessel code, rated at 13 bar pressure. It provides sufficient presteaming time for softening of the chips by its usable volume of up to 20 m3. Thanks to its conical...

PALLMANN Refiner System PR exchange of worn refiner segments. The segment fixing bolts are mounted from the backside without interrupting the grinding area. Together with the accurately pre-assembled segments, this ensures homogeneous and high quality fiber. The grinding gap of all Pallmann refiners is adjusted by a precise hydraulic servo system at extremely close tolerances allowing calibrated fiber quality. The reliable and heavy duty Pallmann bearing design is unique in the industry. Only the radial guidance of the shaft is taken by roller bearings. The dominating axial thrust of the grinding process...

Refiner blow valve The fiber is discharged to the dryer through the blow valve, designed as an adjustable orifice-type valve. The special features of this valve are its easy and reliable positioning by a hydraulic cylinder as well as its unsurpassed wear resistance. Fiber diverter valve Pallmann provides with its compact diverter valve a reliable and most robust component channelling fiber either to the start-up cyclone or to the dryer. By its designed features, the valve is virtually maintenance free. PLC and HMI-control system The Pallmann refining system is equipped with state-of-the-art PLC...

Customer benefits • Heavy duty design of all components to assure best refining conditions and long service life. • Functional units completely assembled and test run in our workshop, allowing swift installation and commissioning. • Maintenance-friendly design of single components maximizing up-time and minimizing spare part cost. • Extra long drainage and plug pipe section for even fiber moisture and economic dryer operation. • Drop-in designed elements allowing swift exchange of wear and spare parts. • Arrangement of discharge and feeding screws on the same level allows a very even dosing of...

TOP PERFORMANCE IN SIZE REDUCTION Pallmann Pallmann is the leading manufacturer of size reduction machinery for the wood products industry. Pallmann Maschinenfabrik designs, manufactures and supplies tailor-made, individual or complete solutions for the processing of raw material for MDF, OSB and particleboard plants. At its headquarters in Zweibrucken, Pallmann company operates the world’s largest research and development center for size reduction technology as well as a training and service center. More than 100 test machines are available for the preparation of various raw materials including subsequent...