The Importance of Sealing Strips and Air Tube for Vacuum Suction Roll

There are many vacuum suction roll used for paper machine, such as vacuum couch roll, vacuum transfer roll, vacuum pick up roll and vacuum press roll. The vacuum suction roll normally are composed of roll body, vacuum box, sealing strips and rubber air tube, spray pipe, regulating screw, and pressure and vacuum indicator instruments. The sealing performance of vacuum suction roll affect the quality of finished paper. And the suction roll sealing performance is affected by sealing strips and air tube, so it is very important to choose good quality and suitable sealing parts for your vacuum suction roll.

Vacuum Chamber Sealing Problem Affect Vacuum Roll Running Ability

The isolation between vacuum chambers mainly relies on a sealing strip, but when the seal is not tight, a series of vacuum problem may occur, which usually leads to an abnormal increase in vacuum degree in low vacuum chambers, thereby affecting the smoothness of paper feeding. At the same time, wear and tear of the edge seal or the spring being stuck by foreign objects (such as pulp) can also cause the edge seal to be loose, leading to edge banding and shedding problems during the paper web transfer process, seriously affecting the stable operation of the paper machine.

The spraying lubricating water is not opened normally or the operating pressure is insufficient (should not be less than 3bar), resulting in dry friction between the sealing block and the shell;

Secondly, if the core cleaning is not carried out for a long time, the sealing block spring or pressurized airbag may fail, affecting the rebound of the sealing block;

In addition, leakage of pressurized air tube can also lead to insufficient operating pressure, which in turn affects the tightness of the seal.

At the same time, improper adjustment and optimization of the edge seal in the vacuum suction area, as well as problems caused by poor matching between the outer shell and the inner core, will periodically affect the sealing effect.

SUN HONG Sealing Strips

SUN HONG has considerable experience in the field of vacuum suction roll sealing strips, and we started using ultra-high molecular weight polyethylene materials at that time. With the increase of paper machine speed, it is no longer guaranteed to be used, and even affects the life of the roller body, such as delamination and low vacuum degree. Serious impact on production. Our company has launched graphite sealing strips. Specially designed for use with vacuum suction rolls. Our experience and knowledge in this area have facilitated the development of our new generation of graphite sealing strips, which are made from the highest quality materials available today and meet the requirements of modern high-tech paper machines. Their development provides maximum safety assurance for the normal operation of vacuum suction rolls.