DST-1 Tied Diaphragm Manual Operating Valve for Semiconductor industry |
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1.Ultra Clean
- Tied-Diaphragm design
- Particle-free & Dead-space free
- Assembled, Leak test and packaging are all performed in a class 10 clean room
2.Key Features
- High Flow rate
- Purge performance is improved
- Seat Cassette is replaceable easily
3. Safety
- Double Sealed design in gland nut part
Valve for the manufacturing of Semiconductors/LCD/Solar panel
Contaminant-free gas for manufacturing
In the field of semiconductors, various high purity gases are used at each manufacturing stage, e.g. in the formation of oxide film and dry etching, and as the ambient gas for single crystal culture. For the manufacturing of super-LSI through hyperfine processing with submicron accuracy, clean stainless-steel valves are used which produce no micro-dust, moisture content or oil. These stainless-steel valve greatly enhance product yield.
Grade | Surface roughness at gas wetted surface | Cleansing method | Assembly | Seal test | Pressure test | Packing |
---|---|---|---|---|---|---|
Grade 20 | Rmax below 0.8micrometer | DI water | Clean room(Class10) | High purity Nitrogen, Snoop testing or by Helium leak detector | High purity Nitrogen, pressured snoop testing | Clean packed with high purity Nitrogen filled |
Grade 25 | Rmax below 1.0micrometer | DI water | ||||
Grade 30 | Rmax below 4.0micrometer | Organic Solvent |
CV Value
・For Use: 0.6
・For Filling: 0.6
・Maximum service pressure: 20.00Mpa (200Bar)