Memory Packings PTFE
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M emory packings are singleacting sealing elements with excellent sliding properties. They are used primarily for sealing reciprocating pistons and rods as well as for rotary and swiveling applications. The one-piece seal is manufactured from the high-strength fluoroplastic, PTFE or PE-UHMW, with its memory effect resulting from a special manufacturing technique. The memory effect allows the required contact pressure to be achieved without an additional spring element. Benefits • Extremely low friction, constant across a wide temperature range • Outstanding dry-running characteristics • No...

Application Examples Pneumatics Cylinder seal with low displacement force for stick-slip-free operation. Memory packings are used in a wide range of industrial applications: • Automotive industry, e.g. in headlight washer systems, small compressors for pneumatic • Compressors and vacuum pumps, suspensions, ride leveling sys- tems, vibration dampers • Food processing industry, mechanical engineering, e.g. metering devices and packag­ e.g. valves and solenoid valves ing/filling equipment • Pneumatics, e.g. in cylinders and other pneumatic components • Medical and pharmaceutical industry, e.g....

Painting Technology Compressors and Vacuum Pumps Food Processing Industry Wobble piston compressor with cup seal serving as a piston seal in non-lubricated operation (oil-free application). Rod seal used in valves for bottling plants. With minimum clearance space and good flushing properties (aseptic applications). Seal Design and Action 1 Principle 1 � Sharp sealing edge � Back of seal � Flexible sealing lip � Pressure/media side The action principle of all seal types and shapes is identical. The seals differ merely in terms of their geometries and applications. The sealing effect is...

Standard Type EMS Stock Range, Standard Dimensions, Basic Type: EMS Ordering example: EMS – 12 x 6 x 3.6 – HS 21029 EMS HS 21029 = Standard compound PTFE special compound HS 21029, EMS – Piston and Rod Seal; the advanced, second-generation compound is HS 21059. To find the compound combinations best suiting the respective applications see compound table Special dimensions and other compounds available

Piston Seal Rod 0 Groove Depth Groove Width Bf7 T G+0-2 EMT - Piston Seal Cup packing used as piston seal. EMH - Rod Seal | Wiper | Shaft Seal Cap packing used as rod seal/wiper as well as shaft seal. EMTX - Piston Seal Cup packing, with integrated guide, used as piston seal. EMHX - Rod Seal | Wiper | Shaft Seal Cap packing with integrated guide.

For certain application requirements different versions of ready-/easy-to-assemble complete solutions are available as well. Special Versions Benefits: • One-piece piston • Replaces metal piston by plastic piston • Ready-/easy-to assemble versions offering favorable cost-benefit ratio • No damage to seals during assembly/installation • Complete package solutions, including seal and integrated guide, available Complete Piston with Standard Memory Packing EMS Single-acting; piston can be made from aluminum, plastic or steel. Complete Piston with Memory Cup Packing in Plastic Piston -...

Technical Details The memory effect is dependent on a number of different influencing This diagram shows the low displace- factors, such as manufacturing ment force of a memory packing parameters, tool/mold design, seal­ compared to spring-energized seals and a hydraulic seal, a so-called O-ring-pre-loaded PTFE stepped ring When it comes to designing a memory packing, you can trust us to results from the low preload of the draw on years of experience. All memory packing. It offers extremely you need to do is to provide us with favorable friction behavior. your technical operating...

Design and Fitting Instructions (see Spring-Energized Seals chapter, page 30) Assembly with split groove. Assembly with semi-closed groove (snap-in assembly). Snap-in assembly

Piston Seal Assembly with split groove. Assembly with semi-closed groove (snap-in assembly). Snap-in assembly Surface Quality See Spring-Energized Seals chapter. Storage Instructions See Spring-Energized Seals chapter.

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