Vacuum unit conversion
× 103 6.895 × 104 68.95 6.805
× 10-2 7.031
× 10-2 2.086 1
1, different density of air molecules under pressure
P (ADS) 1 10-3 10-4 10-5 10-6 10-9
n0 (a / cm 3) 4 × 1016 4 × 1013 4 × 1012 4 × 1011 4 × 1010 4 × 107
2, the main properties of vacuum grease
Name component at 20 ℃ saturated vapor pressure (ADS) the maximum operating temperature (℃)
Carbon polymer 2 # 3.1 × 10-8 30
3 # 10-9 35 oxygen compounds
4 # soap grease 10-7 ~ 10-8 130
7501 silicone oil add silica fume 10-6 following -40 ~ +200
12, power conversion unit
Dyne (Dyn) Newton (N) Stein kilograms force (kgf)
1 10-5 10-8 1.02 × 10-6
5, power conversion unit
Wawa thousand units of horsepower
Horsepower (PS) 1 0.735 735
Kilowatt (kW) 1.36 1 1000
Watt (W) 1.36 0.001 1
6, vacuum sealing paste properties
Name vacuum sealing vacuum grease vacuum fat lute
50 # 80 # 30 #
Temperature of 50 ℃ 80 ℃ 30 ℃ 10-7 ~ 10-7 ~ 10-8 ADS ADS 10-8 occasional 5 × 10-4
7, features a variety of rubber sheet
Types of natural rubber, butyl rubber NBR rubber fluoroelastomers
Characteristics of one water-resistance, acid resistance, alkali resistance good good penetration of 23 small oil-resistant acid
Characteristics of two large gas sublimation serious flexibility 26 good venting low penetration rate of small
Range of 1 × 10-5 vacuum 10-7 ADS ADS ADS 10-8 entrusted 10-8
Temperature -30 ~ 80 ℃ -30 ~ 150 ℃ -30 ~ 120 ℃ -20 ~ 200 ℃
8, area unit conversion
Square meters (m2) square centimeters (cm2) square millimeter (mm2) square(sc2) square feet (ft2) square inches (in2)
1 10000 1000000 9 10.7639 1550
9, volume unit conversion
Cubic meters or cubicBritish gallon U.S. gallon (liquid) cubic feet or cubic inches Date
1,100,027 219.98 264.18 35.3147 0.06103 554.37
No. 18,1 mechanical vacuum pump oil, the main performance indicators
Projects from the sport stick (cps) flash point (℃) saturated vapor pressure at 20 ℃ (ADS) weight (g / cm 3) molecular weight (grams)
KK-1 50 ℃ when the (47 ~ 57)
100 ℃ (for 8 ~ 11) of not less than 15 not more than 4 × 10-5 0.86 333
10, made the spread of oil-pumping performance indicators
Grade 1 # 2 # 3 # 274 silicone 275 silicone oil
Saturated vapor pressure (ADS) 20 ℃ not more than 4 × 10-8 2 × 10-8 2 × 10-8 2 × 10-8 1.7 × 10-8
Sports viscosity (cps) 45 ~ 60 55 ~ 65 68 ~ 80 38 ± 3 165 ± 20
Freezing point (℃) is not higher than -15 -15 -15 -10 -14 ~ -18
Flash Point (℃) of not less than 230 230 230> 210> 243
Weight (g / cm 2) 1.05 ~ 1.08 1.09 ± 0.02
11, the type of vacuum pump and its scope of work
Vacuum the scope of work (care) pumps the scope of work (care)
Rotary Vane Vacuum Pump 760 ~ 5 × 10-4 reciprocating vacuum pump 760 ~ 10-2
Slide-valve vacuum pump 760 ~ 5 × 10-3 ~ 10-4 Absorption pump 760
Oil booster 10-1 ~ 10-4 sputtering ion pump 10-4 ~ 10-10
Roots vacuum pumps 10-1 ~ 10-4 titanium sublimation pump 10-3 ~ 10-10
Oil diffusion pump 10-3 ~ 5 × 10-7 molecular pump 10-3 ~ 10-10
Water ring vacuum pump 760 ~ 25 cryopump 10-3 ~ 10-10
12, water at various temperatures under saturated vapor pressure
Temperature stress temperature stress
℃ Pa Torr ℃ Pa Torr
-13 225.4 1.691 -10 386.5 2.149
-7 361.9 271.5 -3 489.6 3.673
0 610.4 4.579 3 757.8 5.685
13, 001 7.513 101,228 9.209
131,497 11.23 171,937 14.53
202,337 17.54 232,808 21.07
273,564 26.74 304,242 31.82
335,029 37.73 376,274 47.07
407,378 55.32 438,638 64.80
4,710,610 79.60 5,012,330 92.51
5,314,290 107.2 5,717,310 129.8
6,019,910 149.4 6,322,840 171.4
6,727,320 205.0 7,335,420 265.7
7,741,870 314.1 8,353,400 400.6
8,762,480 468.7 9,378,460 588.6
9,790,920 682.1 100,101,325 760.0
101,104,980 787.6
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