ANVER Vacuum Lifters, Vacuum Sheet and Plate Lifters, Vacuum End-EffectorsEffect of Atmospheric Pressure on Vacuum Level
The Possible Vacuum Attained is based on your Altitude
Basically,
The higher you are, the less vacuum you can attain.

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The basic formula is:

Current Atmospheric Pressure x Max. Rated Level of a Vacuum Pump
                                                                          29.92" Hg
(absolute vacuum)

It is important to consider the relationship between atmospheric pressure and altitude as it affects vacuum pump performance.  

Because free air is less dense at higher altitudes (i.e. lower atmospheric pressure) operation at these higher altitudes has the effect of reducing the capacity and maximum vacuum levels attainable.  In general flow is not affected, just the maximum vacuum level attainable.

Refer to the following table to correct for vacuum pump performance at various altitudes.

Vacuum Gauge Reading When Read at Altitude 

Altitude Above 
Sea Level 
(feet)
Altitude Above 
Sea Level
(meters)
Atmospheric 
Pressure
(psi)
Maximum Vacuum 
Level Attainable
(inches Hg)
Vacuum Level 
Loss at Altitude
Maximum Vacuum Level Possible at 
this Altitude
0 0 14.70 29.921 - -
1000 305 14.16 28.9 3.4% 96.6%
2000 610 13.66 27.8 7.1% 92.9%
3000 914 13.16 26.8 10.4% 89.6%
4000 1219 12.68 25.8 13.8% 86.2%
5000 1524 12.22 24.9 16.8% 83.2%
6000 1829 11.77 24.0 19.8% 80.2%
7000 2134 11.33 23.1 22.8% 77.2%
8000 2438 10.91 22.2 25.9% 74.1%
9000 2743 10.50 21.4 28.6% 71.4%
10,000 3048 10.10 20.6 31.3% 68.7%
11,000 3353 9.71 19.8 33.9% 66.1%
12,000 3658 9.34 19.0 36.5% 63.5%
13,000 3962 8.97 18.3 39.0% 61.0%
14,000 4267 8.62 17.5 41.4% 58.6%
15,000 4752 8.28 16.9 43.6% 56.4%

 

Conversion Chart:

Pg-psig Pa-psia In. Hg -mbar Torr -mm Hg % Vacuum
0.00 14.70 0 0.00 760.0 0.0 0.0
0.49 14.24 1 33.86 734.6 25.4 3.3
0.98 13.75 2 67.72 709.2 50.8 6.6
1.47 13.26 3 101.58 683.8 76.2 9.9
1.96 12.76 4 135.44 658.4 101.6 13.2
2.45 12.27 5 169.30 633.0 127.0 16.5
2.95 11.78 6 203.16 607.6 152.4 19.8
3.44 11.29 7 237.02 582.2 177.8 23.1
3.93 10.80 8 270.88 556.8 203.2 26.4
4.42 10.31 9 304.74 531.4 228.6 29.7
4.91 9.82 10 338.60 506.0 254.0 33.0
5.40 9.33 11 372.46 480.6 279.4 36.3
5.89 8.84 12 406.32 455.2 304.8 39.6
6.38 8.35 13 440.18 429.8 330.2 42.9
6.87 7.86 14 474.04 404.4 355.6 46.2
7.36 7.36 15 507.90 379.0 381.0 49.5
7.86 6.87 16 541.76 353.6 406.4 52.8
8.35 6.38 17 575.62 328.2 431.8 56.1
8.84 5.89 18 609.48 302.8 457.2 59.4
9.33 5.40 19 643.34 277.4 482.6 62.7
9.82 4.91 20 677.20 252.0 508.0 66.0
10.31 4.42 21 711.06 226.6 533.4 69.3
10.80 3.93 22 744.92 201.2 558.8 72.6
11.29 3.44 23 778.78 175.8 584.2 75.9
11.78 2.95 24 812.64 150.4 609.6 79.2
12.27 2.45 25 846.50 125.0 635.0 82.5
12.76 1.96 26 880.36 99.6 660.4 85.8
13.26 1.47 27 914.22 74.2 685.8 89.1
13.75 0.98 28 948.08 48.8 711.2 92.4
14.24 0.49 29 981.94 23.4 736.6 95.7
14.70 0.00 29.92 1013.00 0.0 760.0 100.0

Click here for a conversion table of the above and other common units of measure: Conversion Calculators

Our applications engineers are always available to assist you in selecting the right vacuum lifter. Call or e-mail us for assistance.

Click here for more information on Vacuum Lifter Safety Standards.


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