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1. Corrugated roller with diameter of 320mm is made from alloy steel 48CrMo and ground accurately with heat treatment technology. It is plated with hard chrome on the surface with surface hardness up to HRC 55-60. 2. Independent pneumatic sizing mechanism 3. Lubricated with high temperature grease 4. All paper lead shafts, preheating cylinders and forcing shafts are ground and plated with hard chrome on the working surface. 5. The size roller is finely curved reticulate pattern with 24 wires/inch and plated with hard chrome, allowing less amount and more eveness of sizing. 6. The driving part uses independent enclosed oil immersed gear case in the manner of shaft drive. 7. Digital display of glue spread and electric adjustment thereof 8. Flute profile: UV 9. Provided with electric size separation 10. Variable frequency control of drive force 11. The outer facing preheating cylinder has a diameter of 415mm， and pressure roller has a diameter of 320mm 12. Upper corrugated roller is mounted on a seat that is easy to dismount. 13. All rollers use straight-way stainless steel drainage device in their drain system, providing independent draining, centralized retting and removed bypass design, which can be free of maintenance for the whole service life, saving stop valve and check valve, simplified installation and maintenance of the return circuit. 14. Steam pressure of 1.1-1.2Mpa, and water is discharged through a siphon 15. Provided with high pressure centrifugal fan, with a silencer
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