PFI Mill

Description

Code: E.504

Use

For grinding/beating pulp in laboratory quantities under standardized conditions (30 g).

Device description

The PFI mill is used to grind cellulose samples on a laboratory scale. Correct grinding is the first important step in producing test sheets of the appropriate quality. The heart of the PFI mill consists of two rollers: an inner toothed roller (grinding body with 33 knives) and a smooth grinding sleeve. A cellulose sample that has been weighed and prepared with the standardized disintegration device (code: P.401.x) is placed in the grinding container and distributed evenly over the entire inner wall. Then the grinding media is lowered into the grinding sleeve. After pressing the start button, the rollers rotate at different speeds in the same direction. The grinding process starts automatically. Due to the contact pressure of exactly 3.33 N/mm, the pulp is ground under constant standardized conditions. After opening the mill, the ground pulp is removed and the Schopper-Riegler value (°SR) is determined. The device is available for further grinding and a grinding curve can be created.

Features

• Grinding chamber and roll made of sturdy stainless steel
• Toothed belt drive
• Automatic process start after pressing a button
• Beating of 24 – 30 g pulp with a concentration of 10 % (max. 300 ml of suspension)
• Grinding body stops after beating process automatically and moves back to the center of the grinding chamber after the preset number of revolutions
• Adjustable grinding gap
• Grinding chamber bottom can be opened for comfortable cleaning and emptying
• Special device for cleaning the toothed roll
• Constant contact pressure (weights): no influence of compressed air fluctuations during grinding
• Digital display of operating hours
• Work performance in W (measurement constant)
• Grinding energy in kWh during the process

Applicable standards

ISO 5264-2; DIN-EN 25264-2; TAPPI T248; SCAN C24; PAPTAC C7

Connections

Specifications