Sealing technology manual for the process industry - Rotary shaft seals

ROTARY SHAFT SEALS Only Freudenberg offers the original Simmerring® as a rota- ry shaft seal for the sealing of rotary shafts and spindles and the protection of bearings. This sealing system is primarily intended for use in applications involving rotary motion. Simmerring® Radiamatic® HTS II rotary shaft seals are a cus- tom-developed product made of PTFE and can be used in a broad spectrum of food and beverage industry applications. The product stands out because of its low friction, a result of PTFE’s own low coefficient of friction, in conjunction with the low contact pressure exerted on the rotary shaft by the lip. The primary advantage of HTS II rotary shaft seals is their high media resistance, since the media to be sealed come into contact exclusively with PTFE. PTFE is a material that performs exceptionally well in nearly all media and cleaning agents and makes especially hygienic processes in food and beverage production possible. HTS II rotary shaft seals also offer outstanding sealing perfor- mance with minimal contact pressure, which is generated by the geometry of the sealing lip joint and the memory ef- fect of the PTFE. This concept minimizes abrasion while si- multaneously ensuring a reliable sealing performance. Spe- cial variants are also available for more extreme demands, e.g. higher pressures, dead space-free design, or dusty oper- ating conditions. Lastly, the seal’s innovative lip design also makes it possible to affordably reduce the number of com- ponents needed for individual applications. TYPES HTS II 9535 With standard lip for conventional applications HTS II 9536 SL With additional dust lip for use in dirty and dusty environments that pose a risk of foreign objects getting under the sealing lip and in applications involving alternating pressure-vacuum operation HTS II 9538 DL With a double sealing lip for high security standards HTS II 9539 VL Dead space-free version with protruding sealing lip for Hygienic Design applications WADB 9461 • Extremely compact shaft seal for tight installation spaces • To be used only in combination with a secondary seal made of FKM or virgin PTFE on the surface that will come into contact with media HTS II 9541 with twist With dynamic return capability for applications with high liquid level or increased demands on impermeability HTS II EWS • For use at elevated levels of shaft runout • With integrated flexible bellows element • Application limits up to 1 m/s and 3 bar Product portfolio 76

Pages Overview