EVAC AG - Now supplied by John Morris Scientific
John Morris Scientific
Scientific Instrument Supplier
John Morris Scientific are proud to be appointed as the new distributor for EVAC AG within Australia, New Zealand and the islands of the South West Pacific. Based in Switzerland, EVAC AG is an international leader in quick-release connections for high-demand vacuum and process technology applications including ultra high vacuum and high pressure hydraulics.
Scientific Instrument Supplier
EVAC AG offer a wide range of standard and custom made chain clamps, flanges, fittings, seals and bellows, including:
KF Systems are frequently used for rough to high vacuum, up to 10E-9 mbar (100 nPa), or peak pressure up to 20 bar (2 MPa), depending on the flange diameter, seal material, and geometry of the centre ring. While inner centre rings are used for vacuum applications, outer centre rings are used for overpressure. Combinations of both are available, where both conditions are likely to occur.
KF connections are available in sizes NW10/16 up to NW50 according to ISO. An additional size, KF NW63 is also available from EVAC with appropriate seals (elastomer, aluminium) and chain clamps.
CeFiX® Systems are the next generation of the old Conflat® (CF) system. They allow customers to create a EUHV leakproof connection within seconds. This connection (< 10E-11 mbar, <1 nPa) can carry an overpressure of up to 300 bar (using especially certified chain clamps with TÜV approval). This is achieved by using very hard nickel seals, even impossible to penetrate by a CF knife edge, but easily compressed using the gear-type force-multiplying mechanism of CeFiX® chain clamps. This technology requires only 50% of the CF compression force at seal surface in order to achieve gas-tight intermetallic diffusion bonds.
With a particle-free area-pressing mechanism, seals can now be re-used up to 10 times due to the fact that smooth overlapping areas do not exhibit the leaking deficiencies of the deep CF groove imprints. Another advantage of the wide overlapping area and wide 200 to 400µm crossection is its extensive thermocycling capability with a sheer range of -271 to +450 oC, usually breaking the fragile CF knife edge just after one cycle.
Tapered™ Systems allows customers to create a leak proof connection within seconds by tightening 1-2 screws (elastomer seals = 1 screw and aluminium edge seals = 2 screws in order to get a better force distribution). They are available in standard sizes from NW80 up to NW250 although larger sizes up to NW700 are available on request. Flanges are available in stainless steel as well as in glass (Duran®, quartz).
sTeRIc-clamp™ Systems provide a gap free connection for customers who need to meet cleaning in place (CIP) requirements. The seamless transition in between flanges, as well as the special wave design of bellows allows for in-situ brush cleaning of the system without opening and inserting bacteria or other contaminants from the outside. sTeRIc-clamp connections are available in sizes NW8 up to NW80 as standard.
For further information please contact John Morris Scientific on 1800 251 799 or email [email protected]