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Language: English French Polish Portuguese Russian
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Wet Pressing Series (Details)Includes 7 courses for $299/year. Paper Library (Details)Includes 97 courses for $1,499/year.
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Training Time: 14 minutes
Compatibility: Desktop, Tablet, Phone
Based on: Industry Standards and Best Practices
Languages: English, Portuguese, French, Polish, Russian
Though their design and construction are very similar, suction rolls perform several different functions on paper machines, depending on their position. They can be used to remove water from the sheet, transfer the sheet, improve dewatering in a press nip, dewater a felt, stabilize the sheet, or pull steam into the sheet. Roll cover selection should take into account the functions of the roll and the operating conditions.
Felt Cleaning and Conditioning
View Course
Felt Tensioning and Guiding
Roll Presses
Shoe Presses
Wet Pressing Theory
The following key questions are answered in this module:
Where are suction rolls typically located on a paper or board machine?Paper and board machines are typically equipped with multiple suction rolls in the forming and press sections.
What are suction press roll shells constructed from?Suction roll shells are typically constructed of bronze or stainless steel.
What is the flushing shower in a suction roll used for?The flushing shower is used when the paper machine is down to clean and flush stock build up out of the vacuum box and the holes in the roll shell.
What are the most common roll cover materials?Rubber and polyurethane are the two most common roll cover materials. Rubber is very versatile, while polyurethane is tough and wear resistant. These materials can be designed for use in many different applications.
Where are ceramic roll covers used?Ceramic roll covers are extremely wear resistant and have very good release properties. They are often used on center press rolls.
Below is a transcript of the video sample provided for this module:
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