Sealing technology manual for the process industry - Guide strips

GUIDE STRIPS Guide strips are used in various machines for the food and beverage industry to compensate for the lateral forces and deflections occurring. This requires a high pressure resistance of the material. At the same time, the material used must have sufficient flexibility to prevent it from being damaged during assem- bly. In food and beverage applications where guide strips have direct contact with the medium, the materials used must comply with the legal framework. Comparable com- binations of approved materials demonstrated in a bench- mark that they do not withstand the high forces, e.g. in homogenizers, and have a propensity to gap extrusion. This leads to increased wear and thus to a significantly reduced service life. Guide strips made of PTFE Y005 ensure low wear and a much longer durability thanks to minimized extrusion propensity. PTFE Y005 is a special compound and consists of a virgin, high-grade pure PTFE and a filler. THE ADVANTAGES AT A GLANCE • High compressive strength with simultaneous flexibility • Resistant to CIP/SIP cleaning media • Low extrusion propensity • Low wear ensures a long service life • Different sizes up to 200 mm available at short notice • Food-grade materials Extrusion length PTFE-MATERIAL Y005 (VIRIGN) K202 (CARBON-FILLED) G216 (GLASS FIBER-FILLED) 1,6 1,4 1,2 1,0 0,8 0,6 0,4 0,2 0 80 °C (176 °F) 120 °C (248 °F) Extrusion length in mm APPENDIX PRODUCT PORTFOLIO MATERIALS RESISTANCE & PURITY ENGINEERING PLASTICS ELASTOMERIC MATERIALS TECHNICAL FUNDAMENTALS INTRODUCTION 87

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