A CASE OF THE VAPOURS
or WHY SEALS DONT
on either image to download a print quality scan
Seals, pipes, joints, mastics,
O rings, cables and sheaths are excellent at keeping water, and other
fluids, out. Sadly many of them just aren’t a barrier to water vapour
– so the fluid gets through anyway!
This seemingly simple effect
can be one of the biggest problems in manufacturing - it causes electronics
to deteriorate, components to fail and products to rot. Not just little
items, but big objects can suffer just as badly – in fact cars,
planes and even rockets have all failed, simply because seals, O rings
and mastics don’t always keep water vapour out.
Versaperm Limited, a world
leader in measuring and testing water vapour permeability, has launched
a new way to measure this easily, quickly and accurately.
The new WVTR (Water Vapour Transmission) MK VI meter gives results that
can be accurate to better than one part per million (with some samples
a few parts per hundred million). Results for some materials can be obtained
in as little as 30 minutes whereas conventional gravimetric testing can
take several days for a single measurement. It can measure the vapour
permeability not just of flat materials but of containers, enclosures,
products and seals as well.
The meter’s highly automated computerised control is easy to use,
requiring at most, minimal training - even to cope with several samples
at a time. Sensitivities are typically in the range 0.05 - 3200g/m2/day
and the instrument can be configured to measure the diffusion rates of
most gaseous elements (water, O2, CO2, hydrocarbons etc).
any sales enquiries to Christopher Roberts, Versaperm Limited ,
10 Rawcliffe House, Howarth Road, Maidenhead, Berkshire, SL6 1AP, UK
Press Information please contact Gerry Palmer @ the Palmer & Rose
Partnership. Tel 01494 637499, fax 0871 9003898, e.mail email@example.com.