1. Features
UNISTAT is manufactured from graphite-filled PTFE yarn. The high level of graphite minimises the coefficient of expansion considerably ensuring UNISTAT is pressure resistant and a good heat conductor. Due to its chemical stability and high sealing ＆#118alue (k f < 10-20 m 2 ) UNISTAT is particularly suitable for applications in the chemical industry. Due to its low coefficient of expansion UNISTAT withstands extreme changes in temperature.
UNISTAT materials are approved for use in the food processing industries by the MPA.
The soluble chloride content is under 20 ppm. UNISTAT is therefore particularly suited for nuclear power station valves. To avoid gap extrusion at temperatures above 200 °C UNISTAT is used with end rings of GRAFIFLEX 6501-60.
- high sealing effect
- good thermal conduction
- low leakage rates
2. Application
Plunger pumps, valves
3. Operating Conditions
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Pressure: |
Plunger pumps: 800 bar* |
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Valves: 250 bar |
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Temperature: |
- 200 °C to +280 °C |
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Speed: |
Plunger pumps: 2 m/s |
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pH ＆#118alue: |
0-14 |
* installation with end rings
4. Media
Steam, condensate, alkalis, solvents, almost all acids. Exceptions: highly concentrated nitric acid and oleum.
Tested by the Federal Institute for Research and Material Testing, for use against gaseous oxygen up to 40 °C at a pressure of 65 bar and up to 200 °C at a pressure of 50 bar.
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