Gasket System 3000
Pfaudler - Glass-Lined & Alloy Systems
Why are gaskets so important for glass-lined equipment?
General purpose of gaskets is to avoid leakages, but for glass-lined equipment, it’s a lot more: the gasket protects the integrity of the glass-lined vessels and reactors.
A wrong gasket choice or poor maintenance of the torques may result in destroying the glass-lined vessels. Small leakages of highly corrosive media at the nozzles or at the manway, creeping outside onto the flange surface, may undermine the glass at the flange edges, where the glass ends. This can then result in chipping of the glass layer destroying the glass on the flange surface and consequently the vessel itself, so that a complete re-glassing is needed to repair.
The German regulation ”TA-Luft” certified Pfaudler PTFE Gasket Systems 3000 (AF3000/ GR3000/ UF3000/ CP3000) has been developed with the above risk in mind. Efficiency and safety are the keywords of their design.
What are the requirements for gaskets in glass-lined systems?
The Pfaudler Gasket System 3000 meets the following requirements:
- Suitable for glass-lined surfaces, with low surface pressure. Perfect sealing of all glass-lined nozzles;
- Same chemical resistance as glass-lined vessels in design conditions;
- High compressibility to compensate inequalities of the glassed surfaces of flanges;
- Safe compensation of compression at varying pressures and temperatures in the vessel, i.e. residual elasticity after tightening;
- Dimensional stability even for large diameters;
- Easy and safe handling for installation on site.
A large gasket range for all process conditions and nozzle configurations:
All gaskets of the Pfaudler Gasket System 3000 are designed for safe use in highly aggressive and toxic environments at temperatures from -60 to +230°C.
They meet the requirements of the “TA-Luft” regulation regarding emissions and air protection and by FDA conformity are suitable for highly pure pharma processes.
For different diameters of the flanges and various pressures in the equipment, the following details refer to the different types of existing gaskets:
WT: small diameters, pressures up to 40 bar with AF3000 aramid fibre inserts
WT conductive: like WT, but electrically conductive with GR3000 graphite inserts
WKT: intermediate pressures, large diameters with AF3000 inserts + UF3000 filler compound
WKTG: like WKT, but with bull nose PTFE envelope up to 3 mm, diffusion tight
WKTV: like WKT, but with PTFE envelope specially shaped for high-vacuum processes
WTR: like WT, but with wedge shaped AF3000 inserts to offset angle tolerances on agitator nozzles