• Hard chromium
• Chromium Teflon
• Wolfram carbide
• Wolfram carbide & Teflon
• Nitrile-rubber NBR, black
• Hydrated nitrile-rubber HNBR, red
• Hypalon CSM, blue
• Silicone rubber, pink or light brown
In addition, rubber-sheathed rolls can be fitted with seamless, etched Teflon socks to ease the detachment of the sheath.
TEVO® spreader roll with Direct Drive is applicable for all positions in a paper machine. Operating speed of the roll can be adjusted precisely with the web speed.
At low speeds the Direct Drive is supplied with a planetary gear for the use, for example, in press and drying section of a pulp machine.
Your existing spreader roll can be modified to a TEVO® Direct Drive roll during a roll overhaul.
Both steel-clad and rubber covered TEVO® spreader rolls can be equipped with a hydraulically adjustable bow height.
TEVO® Vari-Bow is easy and reliable to use. The roll is supplied together with hydraulic hoses and hand pump. It is suitable especially for size press, coater and slitter applications.
A spreader roll with variable curvature helps to define the needed bow height for future spreader rolls with fixed bow height to be used at the same position.
Turning of the shaft is carried out with the help of a small-size electric gear motor, it can be done either from the roll end or directly from control board.
In addition, sensors can be mounted for the shaft adjustment unit to keep a limited turning range.
Motorized shaft adjustment is a good choice for such a position where spreader roll is situated in a narrow place or high in the upper part of a pulp or paper machine.
TEVO®-spreader rolls cooling is achieved with pressurized air, its use is safe and it doesn’t expose roll parts to corrosion. Pressurized air going through the roll cools off simultaneously the shell and bearings.
An air-cooled TEVO® spreader roll is a very good solution to eliminate any markings caused by excess heat for susceptible paper grades.
ROLLS FACTORY | RAAHE | FINLAND