# Liquid Ring Vacuum Pump Vacuum Adsorption

Recently, there are many customers who ask about the application of liquid ring vacuum pump in vacuum adsorption handling. Therefore, the manufacturer of EVP vacuum pump will introduce vacuum adsorption and its application principle. Vacuum adsorption is a simple summary of the use of vacuum pumps or vacuum generators to create pressure differences to achieve adsorption clamping and handling objects.

Vacuum adsorption is a common application of vacuum pumps, such as vacuum handling and CNC machining centers. The main principle is to use the vacuum pump to vacuum at the suction cup to create pressure difference to hold various workpiece objects.

In the application of liquid ring vacuum pump in vacuum adsorption and transportation, how can we know how much adsorption force the vacuum sucker will produce?

The estimation of vacuum adsorption force is mainly based on pressure formula, that is, F = PS. In the application of vacuum adsorption, the calculation method will be adjusted slightly, as follows:

F(101-P absolute pressure)x S sucker area X 10-2

In the formula, F is the absorptive force produced by vacuum sucker in theory, unit: Kgf; P absolute pressure is the absolute vacuum degree achieved in the application of vacuum pump, unit is KPa; 101 is the standard atmospheric pressure value, so it needs to be adjusted according to the situation in some special altitude areas; S sucker area is the effective area of vacuum sucker, unit is KPa. Square centimeter (cm2).

For example, through a vacuum pump, the vacuum suction cup can achieve a vacuum of 10 kPa, so the pressure difference between the vacuum cup and the atmospheric pressure is 101-10=91 kPa. At this time, the effective area of the vacuum suction cup is 10 square centimeters, and then the adsorption force is 91 x 10 x 0.01, that is to say, the vacuum suction cup can theoretically reach about 9.1 Kgf.

The basic principle of the liquid ring vacuum pump for vacuum adsorption is that the suction port of the vacuum suction cup is connected with the vacuum pump or the vacuum generator. After the start of the vacuum pump or vacuum generator, the air inside the suction cup is pumped out to form a vacuum state with pressure of P2. When the pressure of P2 is lower than that of P1, the pressure difference is formed. The workpiece will be absorbed under the pressure difference between the external pressure and the internal vacuum. Once the vacuum is destroyed, the adsorption force will disappear and the workpiece will be separated.

In vacuum adsorption handling, the higher the vacuum degree inside the sucker, the greater the pressure difference, the tighter the sucker and the workpiece are attached to each other; the higher the pumping speed and flow rate between the vacuum pump and the vacuum generator, the easier the vacuum degree inside the sucker will be maintained, and the shorter the reaction time of vacuum adsorption; the larger the contact area between the sucker and the workpiece, the higher the vacuum degree, the greater the adsorption force. In addition, in practical application, the vacuum adsorption capacity is also affected by the structure of vacuum sucker, sucker material, sucker and workpiece surface fit, as well as the direction and speed of workpiece adsorption and transportation.

Vacuum adsorption is commonly used in various industries for the transportation of objects with smooth and impermeable surfaces that are not suitable for clamping, such as electronics, light industry, printing products, as well as the transportation of various forgings, stampings, etc. In life, the most common application is vacuum adsorption hook, so the understanding is relatively simple.

Vacuum adsorption is a very easy-to-master transfer technology. Using vacuum technology to regulate, control and monitor can effectively improve the efficiency of parts and components in automation and semi-automation production. In addition, the liquid-ring vacuum pump for vacuum adsorption has the advantages of cleaning, stable adsorption, reliability and no damage to the surface of the adsorbed objects. Therefore, vacuum adsorption technology has been widely used in various fields, and even the liquid-ring vacuum pump has a relatively outstanding performance in the application of vacuum adsorption and transportation.

2BE1 Series Liquid Ring Vacuum Pump

 Model Speed(Driving mode) Shaft power Motor power Ultimatevacuum Max. capacity Weight (excl.motor) r/min KW 380V hpa M³/hr M³/min kg 2BE1-102 1450 (direct)1750 (V-belt) 6.08.0 Y132M-4-7.5Y160M-4-11 33hpa(-0.097MPa) 246290 4.14.8 110 2BE1-103 1450 (direct)1750 (V-belt) 8.211.1 Y160M-4-11Y160L-4-15 33hpa(-0.097MPa) 340412 5.76.9 125 2BE1-152 1450 (direct)1625 (V-belt) 1750 (V-belt) 12.515.0 17.2 Y160L-4-15Y180M-4-18.5 Y180L-4-22 33hpa(-0.097MPa) 450510 535 7.58.5 8.9 175 2BE1-153 1450 (direct)1100 (V-belt) 1300 (V-belt) 1620 (V-belt) 1750 (V-belt) 16.310.6 13.4 19.6 22.3 Y180M-4-18.5Y160L-4-15 Y180M-4-18.5 Y180L-4-22 Y200L-4-30 33hpa(-0.097MPa) 600445 535 648 700 10.07.4 8.9 10.8 11.7 200 2BE1-202 980 (direct)790 (V-belt) 880 (V-belt) 1100 (V-belt) 1170 (V-belt) 1300 (V-belt) 18.213.4 16.3 23.8 25.7 30 Y200L2-6-22Y180M-4-18.5 Y180M-4-18.5 Y200L-4-30 Y200L-4-30 Y225S-4-37 33hpa(-0.097MPa) 750590 670 860 888 950 12.59.8 11.2 14.3 14.8 15.8 460 2BE1-203 980 (direct)790 (V-belt) 880 (V-belt) 1100 (V-belt) 1170 (V-belt) 1300 (V-belt) 29.521.2 24.8 34 38 42 Y250M-6-37Y200L-4-30 Y200L-4-30 Y225M-4-45 Y225M-4-45 Y250M-4-55 33hpa(-0.097MPa) 1080870 980 1210 1320 1390 1814.5 16.3 20.2 22.0 23.2 530 2BE1-252 740 (direct)565 (V-belt) 660 (V-belt) 830 (V-belt) 885 (V-belt) 938 (V-belt) 3823.7 31.8 45 54 60 Y280M-8-45Y200L-4-30 Y225S-4-37 Y250M-4-55 Y280S-4-75 Y280S-4-75 33hpa(-0.097MPa) 17001200 1500 1770 2000 2100 28.320.0 25.0 29.5 33.3 35.0 870 2BE1-253 740 (direct)565 (V-belt) 660 (V-belt) 740 (V-belt) 792 (V-belt) 820 (V-belt) 880 (V-belt) 940 (V-belt) 5437.2 45 50.8 60 68 75.1 88 Y315M-8-75Y225M-4-45 Y250M-4-55 Y280S-4-75 Y280S-4-75 Y280M-4-75 Y280M-4-90 Y315S-4-110 33hpa(-0.097MPa) 24501690 2100 2340 2560 2640 2780 3050 40.828.2 35 39 42.7 44 46.3 50.8 930 2BE1-303 740 (direct)590 (direct) 466 (V-belt) 530 (V-belt) 583 (V-belt) 660 (V-belt) 740 (V-belt) 9865.5 48 58 64 79.8 96 Y315L2-8-110Y315L2-10-75 Y250M-4-55 Y280S-4-75 Y280S-4-75 Y280M-4-90 Y315S-4-110 33hpa(-0.097MPa) 40003200 2520 2820 3100 3550 3840 66.753.3 42 47 51.7 59.2 64 1700 2BE1-305 740 (direct)590 (direct) 490 (V-belt) 530 (V-belt) 583 (V-belt) 660 (V-belt) 740 (V-belt) 10870 55 61 68 90 110 Y355M1-8-132Y355M1-10-90 Y280S-4-75 Y280S-4-75 Y280M-4-90 Y315S-4-110 Y315M-4-132 33hpa(-0.097MPa) 45203750 3150 3380 3700 4090 4550 75.362.5 52.5 56.4 61.2 68.1 75.8 1820 2BE1-353 590 (direct)390 (V-belt) 425 (V-belt) 464 (V-belt) 530 (V-belt) 560 (V-belt) 620 (V-belt) 660 (V-belt) 12163 72 85 95 110 133 152 Y355L2-10-160Y280S-4-75 Y280M-4-90 Y315S-4-110 Y315M-4-110 Y315L1-4-132 Y315L1-4-160 Y315L2-4-185 33hpa(-0.097MPa) 53003580 3700 4100 4620 5000 5500 5850 88.359.7 61.7 68.3 77.0 83.3 91.7 97.5 2300 2BE1-355 590 (direct)390 (V-belt) 420 (V-belt) 464 (V-belt) 523 (V-belt) 590 (V-belt) 660 (V-belt) 13675 80.8 95 113 136 182 Y355L2-10-160Y280M-4-90 Y280-4-90 Y315S-4-110 Y315M-4-132 Y315L1-4-160 Y315L2-4-200 33hpa(-0.097MPa) 57004180 4260 4850 5230 6000 6510 9569.7 71 80.8 87.1 100 108 2450 2BE1-403 330 (V-belt)372 (V-belt) 420 (V-belt) 472 (V-belt) 530 (V-belt) 98110 131 160 213 Y315M-4-132Y315M-4-132 Y315L1-4-160 Y315L2-4-200 Y355M2-4-250 33hpa(-0.097MPa) 48605400 6470 7380 8100 8190 107.8 123.0 135.0 3750 2BE1-405 330 (V-belt)372 (V-belt) 420 (V-belt) 472 (V-belt) 530 (V-belt) 100118 140 170 216 Y315M-4-132Y315L1-4-160 Y315L2-4-185 Y315L2-4-200 Y355M2-4-250 33hpa(-0.097MPa) 60006700 7500 8350 9450 100.0111.7 125.0 139.2 157.5 3900

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