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What is the approximate range of ROUGH vacuum?

1000 mbar(a) to 1 mbar(a)

1 to 10-3 mbar(a)

10-3 to 10-7 mbar(a)

1 to 1000 bar

Why don’t vacuum systems need a dryer?

The air in a vacuum already has a low dewpoint

The air has been sucked through the process and is evacuated directly to atmosphere

Because vacuum always creates dry air

A dryer would reduce humidity in the surrounding area

When would the HUMID version of Atlas Copco GHS-VSD+ range be used?

In circumstances where the water content in the process is not enough

When the humidity of the surrounding area is high

In circumstances where there is a high water content in the process

If a fast evacuation of air is required

Why does the oil in a lubricated vacuum pump need to be inspected regularly?

The process air is drawn through the oil and may contaminate the oil, causing damage to the vacuum pump and downtime

Vacuum thickens the oil

To comply with safety regulations

No need for inspections, just change it once per year

What will happen if you run a vacuum pump with a closed inlet?

Nothing

The pump will reach its ultimate vacuum

It’s going to burst

The safety valves will open

What is the main technical difference between a single and a two stage vacuum pump?

Two stage pumps are always smaller

Single stage pump uses more oil

Two stage pumps can achieve a higher vacuum

Single stage pumps rattle more often

What is the optimum operating pressure range for Atlas Copco GHS VSD+ series vacuum pump?

1 – 2 bar(a)

400 – 10 mbar(a)

1000 – 400 mbar(a)

500 mbar(a) – to 1 x 10 -1mbar(a)

What would be the effect of a 1mm hole in the pipes of the vacuum system?

It will reach vacuum as usual

The vacuum gauge will stop working

Objects might start falling from the conveyor belt

Your energy bill will increase

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