Tedima GmbH

MultiSeal Special

Where MultiSeal Standard or the MultiSeal set of lips are not first choice because of special installation reasons, TEDIMA offers still further solutions. The configuration of single and double-lip are dimensionally standardized and represent an economic seal for special solutions.

MultiSeal Special is available in several other materials than the standard ones.

Chamber Shaft Seal RotaSeal GD-2

Chamber Shaft Seal

The shaft seal of our production range GD-2 is a shaft seal in a split case. The applied seal rings are threepiece, radially cut and are radially movable within the housing. Because of the split housing, the installation respectively dismounting is considerably simplified. Special assembly handholds make the handling of big seals much easier. Corresponding mounting threads are foreseen in the housings of bigger dimensions. The layout of the seal, the materials of both housing and seal ring can be adapted to the various operating conditions. The seal rings can be supplied in several PTFE compounds (PTFE with filler materials) as well as in various qualities of artificial carbon.

The shaft seal TEDIMA RotaSeal GD-2 is recommended for applications in fans, blowers, compressors, mixing units, centrifuges, gears, steam turbines etc.The application field ranges from high vacuum up to pressures of 30 bar, from slowly rotating shafts up to 150 m/s sliding speed, from operating temperatures of -190°C up to 600°C, from media like pure air up to high-toxic and/or abrasive gases.

The available materials for the seal rings are especially designed for dry running and hence do not need any additional lubrication. So to increase the leak tightness the grease barriers of various seals in the low-pressure version can be activated. Suitable grease types are listed under ‘useful accessories’. In addition, synthetic PTFE grease is available, which is applicable for high chemical requirements. Activating the grease barriers, however, is merely recommendable with low pressures (up to approx. 1.5 bar and with temperatures of max. 300°C).

Chamber Shaft Seal RotaSeal GD-5

Chamber Shaft Seal

The shaft seal of our production range GD-5 is a sliding three-piece carbon seal ring for the application in blowers, agitators, dryers, stirring units, fermenters etc.

The three-piece seal elements are made from PTFEcompound or special carbon and are produced in an adjustable version, i.e. with overlapping mortised, gastight joints. By the garter spring and the existing medium/barrier gas pressure, the seal ring elements are permanently pressed to the shaft respectively the
shaft sleeve. Because of the continuous sliding contact between seal ring and shaft respectively shaft sleeve, latter ones should be furnished with a wear protection. Further details are given in our brochure: Shaft Sleeves Type TWB 2.

Special characteristics:

• Easy mounting and dismounting because of split housing

• Low leakage even with different operating temperatures because of adjustable seal rings

The adjustable seal rings have to be installed depending on the rotation and pressure direction. On this, please follow our installation instruction.

MultiSeal Standard

The High-Performance Shaft Seal

The thermoelastic high-performance seal Multi-Seal is an alternative for mechanical seals and braided packings.

The thermoelastic high-performance seal TEDIMA MultiSeal operates with a seal lip of a modified PTFE material with stopped cold flow. This material is produced in a special process under the brand name ‘TEDEX’. Seal lips made of TEDEX have a considerable memory effect, high elasticity, low friction, high wearing quality and do not need a metallic spring element.

TEDIMA high-performance MultiSeals are especially produced to ensure a reliable seal for rotating shafts with high pressure, high peripheral speed, high temperature, aggressive media, poor lubrication or dry running. With these applications, conventional radial shaft seal rings are not an ideal option because of the Elastomer material of their seal lips.