Maintenance and Reconditioning of Suction Rolls
Besides the operations of regrinding and covering of any suction roll - couch rolls, wet presses and yankee pressure rolls - RIF is also able to provide the overall maintenance and reconditoning of all its components like the suction box, the bearing housings etc.
 
Generally speaking, the suction rolls play a crucial function in the production cycle of the paper sheet and are usually run in demanding operating conditions, subject to  high working loads and at high operating speed; in particular their function is to  remove a huge quantity of water drained from the sheet, which,  in combination with various chemicals, mineral fillers, fibers etc, negatively impact on the various components of the suction roll, itself  producing corrosion, erosion, clogging of the holes of the shell and within the inner suction box.

If not properly subject to the routine checkout and general service work, a suction roll with reduced performance may seriously jeopardize the productivity of the paper machine.

RIF offers overall check-up and general service work of suction rolls, ranging from the basic to the superior grade, on the basis of the maintenance schedule  of any roll; the main phases  are listed in the following: 

         INTERNAL SUCTION BOX :

  • High pressure cleaning / overall washing
  • Checkout and replacement of the nozzles and sealing strips if necessary
  • Checkout and restoration of mechanical parts, manometers, vacuometers and pipings
  • Optimization/modernization  for improvement of performance  and lifetime
  • Renewal and application of protective and anti-oxidation treatment

       HEADS AND JOURNALS :

  • Measurement check of coupling seats with shell and eventual restoration of suitable interference
  • Measurement of bearing seats and renewal by means of grinding and / or metal spraying
  • Renewal of surfaces  and application of protective and anti-oxidation treatment

         BEARING HOUSINGS AND BEARINGS

  • Assessment of condition of bearings / replacement if necessary  
  • Checkout of bearing seats and refurbishing if applicable            
  • Renewal  and application of protective and anti-oxidation treatment

        SUCTION SHELL  : 

  • Through holes cleaning by various methods, depending on hardness of deposits
  • Measurement of coupling seats, restoration of interference with heads seats
  • Assessment of condition of  fixing bores and screws/ remachining or replacement
  • Repair of damages or indentations on the inside surface,
  • Inside grinding of shell

 COMPLETE SUCTION ROLL

  • Dynamic balancing testing
  • Vibration analysis
The dynamic test run of the suction roll is a must to guarantee troublefree performance.


Richiedi informazioni
Chiudi
Request information
Contact*
Company*
Address
City
Country
Zip code
Phone*
Fax
Email*
Website
Message
 
 
Request form
local agent
Contact*
Company*
Address
City
Country
Zip code
Phone*
Fax
Email*
Website
Message
 
 
Request information
Contact*
Company*
Address
City
Country
Zip code
Phone*
Fax
Email*
Website
Message