wrote in message
oups.com...
I have just got my new 100 Litre (3hp) upright compressor and notice
that its only charging to 7bar.

I wondered if the gauge was inaccurate, but its got 2 and both read
almost exactly the same.. As I final test, I have a engine
compression
tester which I connect and indeed its at around 7 bar.

Is there any reason why I should not adjust the 'cut off' so that it
fills to 8bar? If it has 8 bar in the tank as opposed to 7, then I
assume am going to get more air out (100 litres more), but its
obviously going to take longer to charge and will put extra pressure
on
the tank and fittings.

Has it been set to 7 intentionally, or is it normal to 'fine tune'
it
during its first few used?

Any info would be appreciated

Jon


Jon,

If it's been sold in the UK it should bear a test plate stating the
test pressure and the safe working pressure - or just conceiveable be
provided with a certificate - though unlikely if sold into the 'hobby'
market.

AWEM