Liquid Ring Vacuum Pump for Food Processing

Vacuum is a part of today’s industrial life. It is difficult to imagine any chemical industry, food processing industry or process equipment that does not use vacuum to improve process efficiency. With the progress of technology, the application of vacuum is increasing day by day.

The meaning of vacuum refers to the state of a gas below an atmospheric pressure in a given space, which is a physical phenomenon. In addition, it offers great advantages in heating and oxygen sensitive materials. There are many vacuum-dependent applications in the food industry. The vacuum required by the food industry is in the absolute vacuum range of 1-600 millibars (relative to the vacuum pressure measured by absolute zero vacuum), and is applied to the transportation, processing, filling and packaging of food, clean operation and the creation of appropriate sanitary conditions. The liquid ring vacuum pump is used to generate the required absolute vacuum pressure.

 

2BE3 liquid ring vacuum pump for fractionation:

2BE3 liquid ring vacuum pump for fractionation

 

Speed
(Driving mode)[r/min]
Max. shaft power[KW] Motor power[KW] Max.  Capacity[m3/h]    [m3/min] Ultimate vacuum[mbar] Weight (excl.motor)[Kg]
2BE3- 40 300 (V-belt / gear box) 64.8 6-75 4200 70 160 4050
330 (V-belt / gear box) 75 6-90 4650 77
350 (V-belt / gear box) 86.5 110 4680 81
390 (V-belt / gear box) 99 110 5460 91
430 (V-belt / gear box) 117 132 6000 100
498 (V-belt / gear box) 135 160 6900 115
530 (V-be t / gear box) 148 185 7440 124
570 (V-belt / gear box) 167 200 8000 133
2BE3- 42 300  (V-belt / gear box) 100 6-110 5850 97.5 160 4200
350  (V-belt / gear box) 109 132 6300 105
390  (V-belt / gear box) 133 160 7650 127
449  (V-belt / gear box) 157 185 8550 142
490  (V-belt / gear box) 180 200 9200 154
530  (V-belt / gear box) 200 220 10100 168
570  (V-belt / gear box) 225 250 10600 177
2BE3- 50 236  (V-belt / gear box) 128 160 7500 125 160 6000
266  (V-belt / gear box) 140 160 8500 142
300  (V-belt / gear box) 173 200 10000 167
336  (V-belt / gear box) 235 250 11400 190
366  (V-belt / gear box) 261 280 12500 208
420  (V-belt / gear box) 278 315 13700 228
2BE3- 52 236  (V-belt / gear box) 168 185 9000 150 160 6500
266  (V-belt / gear box) 175 200 10560 176
336  (V-belt / gear box) 260 280 13800 230
366  (V-belt / gear box) 285 315 15000 250
421  (V-belt / gear box) 331 400 16800 280
468  (V-belt / gear box) 416 500 18450 307
2BE3- 60 236  (gear box) 204 250 11820 197 160 8900
265  (gear box) 243 280 14200 236
295  (gear box) 285 315 15900 265
340  (gear box) 365 400 17400 290
370  (gear box) 386 450 19400 323
2BE3- 62 200  (gear box) 195 250 13200 220 160 92500
230  (gear box) 260 315 15180 253
266  (gear box) 300 355 17300 288.3
297  (gear box) 348 400 19300 322
330  (gear box) 395 450 21300 355
372  (gear box) 490 560 24000 400
2BE3- 67 180  (gear box) 250 315 14500 242 160 12200
210  (gear box) 285 315 18000 300
270  (gear box) 415 450 22800 380
300  (gear box) 465 560 25800 430
330  (gear box) 545 630 27720 462
370  (gear box) 670 800 30960 516
2BE3- 72 190  (gear box) 338 400 20100 335 160 15000
210  (gear box) 395 450 23760 396
240  (gear box) 475 560 27000 450
270  (gear box) 550 630 30000 500
300  (gear box) 642 710 33600 560
2BE3-80N

 

 

190  (gear box) 507 560 30000 500 160 19000
210  (gear box) 585 630 32280 538
240  (gear box) 710 800 36600 610
270  (gear box) 849 900 40800 680
300  (gear box) 796 10000 44800 748
2BE3-90N 170  (gear box) 570 630 39000 650 160 24500
195  (gear box) 730 800 46800 780
210  (gear box) 815 900 49800 830
230  (gear box) 925 1000 52800 880
245  (gear box) 1035 1120 55800 930
2BE3-100N 155   (gear box) 730 800 48000 800 160 31000
165   (gear box) 840 900 51300 855
175   (gear box) 900 1000 54000 900
190   (gear box) 995 1120 59400 990
200   (gear box) 1146 1250 62400 1040

 

Fractionation is used to separate components whose boiling points are close to each other. For example, fractional vacuum distillation is used to separate fatty acids or their esters. Multistage steam ejector system or combination of steam ejector and liquid ring vacuum pump is used to produce the required vacuum level of 10 MB absolute value. The water discharged to the steam condensate or liquid ring vacuum pump of water purification equipment usually contains a large amount of fatty acids. Dry vacuum pumps are not suitable because the oil components may start to carbonize.

 

2BE1 liquid ring vacuum pump for vacuum filtration:

2BE1 liquid ring vacuum pump for vacuum filtration

 

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

 

The vacuum required for the filter product depends on the thickness and porosity of the cake. The pressure drop of thick filter cake is high and the absolute vacuum level is 300 millibars. The pressure drop on the porous cake is quite small, making the absolute vacuum level of 600 millibars suitable. The liquid ring vacuum pump is usually used for vacuum filtration.

 

2BV liquid ring vacuum pump for vacuum drying:

2BV liquid ring vacuum pump for vacuum drying

 

Curve No. Model Max. suction capacity Ultimate vacuum
mbar(MPa)
Motor power
kW
Speed
r.p.m
Operating liquidflow rate
L/min
Noise
dB(A)
Weight
kg
m3/min m3/h
60V 2BV2-060 0.45 27 33mbar
(-0.097MPa)
0.81 2840 2.5 62 37
61V 2BV2-061 0.86 52 1.45 2840 2.5 65 41
70V 2BV2-070 1.33 80 2.35 2860 3 66 66
71V 2BV2-071 1.83 110 3.85 2880 4.7 72 85
110V 2BV5-110 2.75 165 4 1440 7.2 63 120
111V 2BV5-111 3.83 230 5.5 1440 8.8 68 150
121V 2BV5-121 4.66 280 7.5 1440 11 69 210
131V 2BV5-131 6.66 400 11 1460 16 73 280
161V 2BV5-161 8.33 500 15 970 22 74 390
110V 2BV6-110 2.75 165 4 1440 67 63 150
111V 2BV6-111 3.83 230 5.5 1440 10 68 200
121V 2BV6-121 4.66 280 7.5 1440 12 69 230
131V 2BV6-131 6.66 400 11 1460 17 73 315
161V 2BV6-161 8.33 500 15 970 23 74 426

 

For vacuum drying, the initial absolute vacuum level of 20-50 millibars is required, and the final absolute vacuum level is about 1-4 millibars. As the filtration process proceeds, water must be sucked deeper and deeper from the hole of the cake, and the pressure drop on the cake increases. The condenser (plate or brine tube heat exchanger) located upstream of the water ring or dry vacuum pump must have sufficient capacity, large size and deep cooling facilities to remove the maximum (water) steam. Plate or salt tube heat exchangers are usually used for this purpose.

 

2SK liquid ring vacuum pump for freeze-drying:

2SK liquid ring vacuum pump for freeze-drying

Model Suction capacity Ultimate vacuum Power speed Water supply Inlet/outlet diam Water inlet
m³/min MPa(G) KW r/min L/min DN(mm) (mm)
2SK1.5 1.35 -0.097 4 1440 10-15 40 G1/2”
2SK-3 2.7 -0.098 7.5/11 1440 15-20 40 G1/2”
2SK-6 5.4 -0.098 15 1460 25-35 65 G1/2”
2SK-12 10.8 -0.098 22/30 970 40-50 100 G1/2”
2SK-20 18 -0.098 45 740 60-80 125 G3/4”
2SK-30 27 -0.098 55/75 740 70-90 125 G3/4”

 

In order to prolong the shelf life of food and maintain basic nutrients, vacuum-assisted freeze-drying (in which water is frozen and sublimated) is applied. The initial vacuum should be about 20-50 MB absolute value to avoid sudden formation of a thick ice layer, making further sublimation almost impossible. Then the absolute vacuum can be gradually reduced by increasing the capacity of the commonly used dry vacuum pump (screw pump).

 

DLV Liquid Ring Vacuum Pump for Vacuum Packaging of Food with Plastic Bag Film :

DLV Liquid Ring Vacuum Pump for Vacuum Packaging of Food with Plastic Bag Film

 

Model Motorspeed Motor power Max. suction capacity Min. inlet pressure
kw HP m3/h CFM mbar Inch Hg a
DLV-120 1450 4.0 5.4 145 85 33 1.0
1750 5.5 7.4 174 102 33 1.0
DLV-180 1450 5.5 7.4 186 109 33 1.0
1750 7.5 10.1 223 131 33 1.0
DLV-300 1450 7.5 10.1 283 167 33 1.0
1750 11.0 14.8 314 185 33 1.0
DLV-350 1450 11.0 14.8 342 201 33 1.0
1750 15.0 20.1 411 242 33 1.0
DLV-400 1450 15.0 20.1 425 250 33 1.0
1750 18.5 24.8 475 280 33 1.0

 

For vacuum packaging operations, the absolute vacuum required may not be too high (up to 100 mbar). Excessive vacuum increases the risk of food being sucked into the vacuum system. Vacuum cans between vacuum pumps and vacuum packers help to minimize fluctuations in vacuum and maintain a constant vacuum level, since speed is essential in vacuum packaging operations. The common vacuum sources used in food packaging operations are oil lubricated rotary vane pumps, oil ring pumps or Venturi systems with compressed air or nitrogen as power fluids, which are part of the packaging machine.

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