POROSITY MEASUREMENT OF PRESS FELTS ON THE PAPER MACHINE (HSPT)

• This Technical Information Paper1 describes a test procedure for the measurement of relative airflow through a felt running on the paper machine.
• This tester has been used by numerous mills to monitor changes in felt porosity throughout its life.
• The instrument can be used to place a number on running felt porosity, the test is of great value in the comparison of one felt with another or in showing changes across the profile of a given felt.
• It also can be of substantial assistance in differentiating between machine problems and felt problems, evaluating felt cleaning methods, predicting end of felt life, and troubleshooting.

It Provides information on:

• Calibration.
• Calculation of H-S number.
• Development of a standard porosity curve.
• Evaluation of felt cleaning methods.
• Predicting time to batch wash and end of felt life.
• Comparing two or more felts.

It Benefits:

• Engineers.
• Technical Director.
• Analyst.
• Laboratory Personal.