CH-3706 Leissigen Switzerland
phone +41 (0)33 847 16 47 fax +41 (0)33 847 16 63

Materials/ Pressure range

Membrane collars
All standard and special constructions are available in the following materials:
Mixture (Compound):
Continuous Temperature range
in °C on the seal lip:
Nitrile rubber NBR
-20 to +100°C
Mineral oils, mineral fats, suds, water, dust, air,
sea water
Ethyl Propylene Diolefin Polymer EPDM
-40 to +170°C
Steam, water, suds Note: For lubrication, use only grease with a silicone base!
Silicon rubber MQ
-50 to +180°C
Mineral oils, mineral fats with low sulphur content

Fluorine rubber FPM
-30 to +200°C
Mineral oils, many chemicals,
sea water, water, suds

Additional special materials are available at short notice, if desired FDA and BGA conform.

Support Parts
The support parts of a normal design are produced from unalloyed steel as per DIN 1624 (St. 12). For special designs, stainless and acid proof steel can be used as per DIN 1.4301 or 1.4571. For DIN 1.4571 corrosion or chemical proof and non-magnetic designs are available.

Pressure Range
During pressurization, the short sealing lip with its short moment arm requires no additional supports (in contrast to normal radial spring seals) and can accommodate much higher pressure ranges. In the range of >6 bar please consult with our technical dept. and note the pressure when ordering. For fluctuating pressures (negative to overpressure) the structural shape AC will be used.

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