Page 44 - Schmalz - Vacuum Components

2_Kap_VT_EN_2016_VT_KAT 18.02.16 09:35 Seite 44
PA01019111_inh_EN.pdf
Vacuum Knowledge
Basic Vacuum Knowledge and Vacuum Terminology
PA01019111_inh_EN.pdf The Atmosphere and its Effects on Vacuum Technology PA01019111_inh_EN.pdf

Schmalz - The Company The air pressure (ambient pressure) depends on the elevation of

the location as well as the temperature at that site. As shown in
the diagram, the air pressure at sea level is 1,013 mbar. At an Ambient pressure at altitude (2,000 m) = 763 mbar
elevation of 600 m (location of the J. Schmalz GmbH in Glatten,
Vacuum Knowledge Germany) air pressure is reduced to 938 mbar. At a height of
2,000 m, the air pressure is only 763 mbar.
Ambient pressure at altitude (600 m) = 938 mbar
This pressure loss also has an effect on working with a vacuum.
The pressure drop with increasing height also reduces the maxi-
Vacuum Suction Cups mum pressure difference that can be attained and therefore the Ambient pressure at
sea level (0 m) = 1,013 mbar‚
maximum holding force. Per 100 m increase in elevation, the air
pressure drops by about 12.5 mbar.

Special Grippers A vacuum generator that generates an 80% vacuum, achieves
a vacuum value of -810 mbar at sea level (ambient pressure =
1,013 mbar); at 2,000 m (ambient pressure = 763 mbar) a
vacuum generator only achieves -610 mbar. The possible holding
Vacuum Grip- ping Systems force of a vacuum suction cup drops proportionally to the vacuum
value that can be attained. This means the application at sea
level presents the best case scenario.

Mounting Elements Important:
All data in this catalog refer to an ambient pressure of 1,013 mbar and an ambient temperature of 20°C.

Vacuum Generators

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Index of Products

44

PA01019111_inh_EN.pdf