China manufacturer 2be4 & Npr2 Series China Pumps Liquid Water Ring Vacuum Pump with high quality

Product Description

Catalogue sheet  for 2BE4 & NPR2

                                                        Liquid Water ring Vacuum pump
  
 
 
 

Main applications

 
Usable in every branch of industry – meets the highest requirements for vacuum and filtration systems. Suitable for any rough vacuum and the conveyance of almost all process gases.
 
 

Features and benefits

 

  • Wear-free and corrosion-resistant
  • Robust and low-maintenance
  • Easy to inspect
  • Variable connections
  • Extremely quiet

 

 

 Performance curves 

 

 Performance range

 
 
 
Performance curves for inlet pressures <160 mbar       only available for 2BE4 30, 40, 50, 60.
 
The performance range are based on operating conditions with saturated  100 % relativer air at a temperature of 20 °C (68 °F), operating water at a temperature of Feuchte und 20 °C, 15 °C 15 °C (60 °F), and a discharge pressure of 1013 mbar (29.92 in Hg abs.).
Tolerance + 5 % for inlet pressure ≥ 250 mbar, acc. to PNEUROP. Toleranz + 5 % ≥ 250 mbar, PNEUROP. Calculation of individual performance curves is done acc. to individual
 Sound pressure level 
 
 

Type / Typ 2BE4 … Surface sound pressure level  and sound power level
  LpA [dB(A)] LWA [dB(A)]
30. / 32. 75 – 82 91 – 98
40. / 42. 77 – 86 94 – 103
50. / 52. 72 – 82 90 – 100
60. / 62. 76 – 91 95 – 110
67. / 72. 76 – 91 95 – 110

The noise levels are measured on bare machines in accordance with EN ISO 2151 and EN ISO 3746 (not including noise emitted from piping and auxiliary equipment). This corresponds to the normal operational state. Values refer to standard rotational speed, inlet and discharge pressures. Values that are specific to a purchase order are available depending on the scope of the order. Actual noise levels can be higher at working place due to background noise and conditions of installation.
 

Speeds and Vibrations 

 
 

Type / Typ 2BE4 … 30. / 32. 40. / 42. 50. / 52. 60. / 62. 67. 72.
Permissible speed range
 
453 – 809 294 – 612 229 – 477 194 – 405 179 – 373 164 – 341
Permissible vibrations (rigid support class)
in mm/s, RMS
< 4.5 < 4.5 < 4.5 < 4.5 < 4.5 < 4.5

 In special cases are excessive vibrations agreed CZPT and permitted. / Measurement according to ISO1571-3.
 
 

 Materials 
Part
 
Teil
 
Material of construction – Werkstoffkombination
Cast iron                                   Cast iron – Stainless steel combination                                    Stainless steel
    B K E H
    Order No. Order No. Order No. Order No.
Vacuum pump 
 
Impeller
   
Spheroidal graphite cast iron
ASTM A 536 Grade 60-40-18 3)
 
Spheroidal graphite cast iron  coated with ceramic 1)
ASTM A 536 Grade 60-40-18 3)
 
Stainless steel
ASTM A 276 316Ti 3)
 
Shaft
 
  
   
Carbon steel 
ASTM A 572 Grade 50 3)
 
Stahl 
S355J2G3 (St52-3N) / 1.571 3)  
 
Shaft bushing
 
   
2BE4:                                  Stainless steel centrifugal casting 
                                            ASTM 532 III A 25% Cr 3)
 
Stainless steel centrifugal casting 
ASTM A 351 CF-10MC 3)
 
  
   
NRP2: Coated shaft in the area of the shaft bushing 
 
—  
 
Port plate
2BE4 3.-2BE4 5.
   
Grey cast iron
ASTM A 48 Class 30 B 3)
                                                      
Stainless steel casting                                                                                              
ASTM A 351 CF-10MC 3)
Port plate
2BE4 6.-2BE4 7.
  Carbon steel 
ASTM A 283 Grade C 3)
 
Stainless steel                                                                                                           
ASTM A 276 316L 3)
 
  
   
Stahl 
S235JRG2 (RSt37-2) / 1.0038 3)
 
                                                      
 X2CrNiMo17-12-2 / 1.4404 3)
                                                      
 
Cone
   
Grey cast iron
ASTM A 48 Class 30 B 3)
 
—                                     —                                      —                                      —                                      —
 
Casing without  partition wall
 
                             
Carbon steel, Polyisoprene (NR)-coated 2)
ASTM A 283 Grade C 3) + Polyisoprene (NR)
                           
                           
Carbon steel, lined with stainless steel
ASTM A 283 Grade C 3) + ASTM A 276 316Ti 3)
                           
 
Casing with
partition wall  
   
Carbon steel, Polyisoprene (NR)-coated 2)
ASTM A 283 Grade C 3) + Polyisoprene (NR)  
                           
—                                                                —                         
(not for 
2BE4 30/32)
 
  Stahl, mit Polyisoprenauskleidung 2)
S235JR (St37-2) / 1.0037 3) + Polyisopren (NR)
 
—                                                                —
                           
 
End shield
   
Grey cast iron 
ASTM A 48 Class 30 B 3)
 
Stainless steel casting 
ASTM A 351 CF-10MC 3)
 
Packings for stuffing box
 
  
   
2BE4:                                 Cotton impregnated (pH appr. 6-8) 
                                                                            
 
NPR2:                                        PTFE,    
 
Ramie-fibre with PTFE 
 
 

 
 An exploded view and further details you can find in our catalogue sheet for 2BE4/NPR2-materials.
 

  1. For coating with ceramic valid 2 % decrease in suction capacity and special warranty conditions. Please contact our GD CZPT sales partner. Max. operating temperature 55 °C (131 °F). / 
  2. Max. operating temperature 65 °C (149 °F)
  3. Or comparable material.

 

 Materials   
Part Teil Material of construction  
(Order code) (Kurzangabe) Cast iron Cast iron – Stainless steel combination Stainless steel
    B K E H
    Order No. Order No. Order No. Order No.
Extended scope of supply  
 
Manifold
(F44/F47)  
 
 
Hosenrohr
(F44/F47) 
 
 
for/bei 2BE4 30…32:      Grey cast iron
                                           ASTM A 48 Class 30 B 1)
 
 
Stainless steel
ASTM A276 316Ti 1)
 
 
 
 
 
 
 
 
 
 
 
                                            Gusseisen mit Lamellengraphit
                                        EN-GJL-200/EN-JL1030 (GG-20 / 0.6571) 1)
 
for/bei 2BE4 40…72:      Carbon steel 
                                           ASTM A283 Grade C 1)
 
                                           Stahl  
                                              S235JRG1+CR / 1.0036 (UST37-2
Edelstahl
X6CrNiMoTi17-12-2 / 1.4571 1)
 
 
 
  
 
Separator (F43)
 
 
Abscheider  (F43)
 
 
Carbon steel
ASTM A283 Grade C 1)
 
 
Stainless steel
ASTM A276 316Ti 1)
 
      Stahl  
S235JRG1+CR / 1.0036 (UST37-2) 1)  
Edelstahl
X6CrNiMoTi17-12-2 / 1.4571 1)  
 
(only for 2BE4)
 
 
(nur bei 2BE4)
 
 
Stahl
S235JRG1+CR / 1.0036 (UST37-2) 1)
 
 
Edelstahl
X6CrNiMoTi17-12-2 / 1.4571 1)
 

 
 1) Or comparable material.
 
 
 

 

Model numbers and order information   
Scope of supply
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Details on page
Cast iron
B
Order No.
Material of construction –
Cast iron – Stainless steel combinations
K                       E
Order No.            Order No.
Bestell-Nr.            Bestell-Nr.
Stainless steel
H
Order No.
Vacuum pump, basic design     
Inlet flange N 1.0 at the top,      discharge flange N 2.0 at the side. 
Flanges acc. to DIN EN 
1092-2
  
 
 
 
 
 
 
 
 
   

               NPR2

 
 
 
 
 
 
 
 
 
 
 
 
 
Shaft sealing
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stuffing box 
with internal sealant 1)
 
   
 
2BE4 …-2BY4
NPR2 …-2BY4
 
2BE4 …-2KY4

 
2BE4 …-2EY4

 


 
 
Stuffing box with external sealant supply
 
   
 
 
 
2BE4 …-2BY3
NPR2 …-2BY3
 
 
2BE4 …-2KY3

 
 
2BE4 …-2EY3

 
 
2BE4 …-2HY3

 
 
Mechanical seal, single acting, with external sealant supply 
   
              Burgmann 
 
              Crane
 
 
2BE4 …-2BY5 or / oder 
2BE4 …-2BY7
 
2BE4 …-2KY5
or / oder 
2BE4 …-2KY7
 
2BE4 …-2EY5 or / oder 
2BE4 …-2EY7
 
2BE4 …-2HY5 or / oder 
2BE4 …-2HY7
 
 
           
 
 NPR2  o.r. / a.A.
 
—  —  — 
 
Mechanical seal,
double acting
 
   
 
 
 
o.r. / a.A.
 
 
o.r. / a.A.
 
 
o.r. / a.A.
 
 
o.r. / a.A.
 
 
 
Casing 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
without partition wall     2BE4 ..0-…. NPR2 ..0-…. 2BE4 ..0-….
2BE4 ..0-….
2BE4 ..0-….
 
with partition wall 2)
 
   
 
 
 
2BE4 ..6-….
NPR2  .6-….
 
 
2BE4 ..6-….

 
 
o.r./a.A.

 
 
o.r./a.A.

 

 
 
 

 Footnotes to page 6,7 and 8
 

  1. Impregnating stuffing box with automatic lubrication  
  2. Design “with partition wall” for 2BE4 30/32 on request
  3. Check, if partial drain flange (F68) is necessary (increasing of operation security)
  4. F23 only for: 2BE4 ..0 -2B.. and 0-2K..;  already included in 2BE4 ..0-2E.. and 0-2H..
  5. Lined with Polyisoprene (F27) is only deliverable with stuffing box with external sealant supply. Max. operating temperature 55 °C (131 °F). Gauge connection N8.7 not available. 
  6. F26: Max. operating temperature 55 °C (131 °F)
Extended scope of supply
Scope of supply
 
   
 
Material of construction pump
(Details on page 4+5 
Cast iron            Cast iron – Stainless steel    Stainless steel combinations
      B K E H
      Order code *) Order code *) Order code *) Order code *)
 
Inlet flange N 1.0 and                
discharge flange N 2.01  at the top:
 
– without partial drain flange
 
     
 
 
F65
 
 
 
 
F65
 
 
 
 
F65
 
 
 
 
F65
 
– with partial drain flange acc. to 
  DIN EN 1092-1
 
 
Discharge flange N2.01 at the top, with mounted
separator 3)                      
 
Discharge flange N2.01  at the top, with mounted
manifold 3)                      
 
Discharge flange N2.0 lateral, with mounted manifold suction- side  
   
 
  
 
F68
 
 
F43 
 
F47
 
F44
 
F68
 
 
F43 
 
F47
 
F44
 
F68
 
 
F43
 
F47
 
F44
 
F68
 
 
F43
 
F47
 
F44
 
 
Casing lined 
with stainless steel 4)
 
End shields in grey cast iron lined with Polyisoprene (NR) 5)
 
End shields in grey cast iron with partially ceramic coating
(erosion protection) 6)
   
 
 
 

 

 
F23
 
F27
 
F26  
 
F23
 
F27
 
   F26  
 
 —
 
F27
 
F26  
 
 —
 
 
 
F26  
 
Operating liquid self-priming
(operation and test)
 
Flange connection acc. to
ANSI B16.5
 
Increase of operating liquid
 
Second shaft extension for tandem drive 
 
Counterclockwise rotation

  • single shaft 
  • with 2nd shaft end

 
Certified acc. to ATEX
   Category 2
 

   
 
 
 
 
 
 
 
 
 
 
 
 
 
F74
 
F62
 
F64
 
F66
 
 
F69 
K98
 
 
F91
 
 
F74
 
F62
 
F64
 
F66
 
 
F69 
K98
 
 
F91
 
 
F74
 
F62
 
F64
 
F66
 
 
F69 
K98
 
 
F91
 
 
F74
 
F62
 
F64
 
F66
 
 
F69 
K98
 
 
F91
 

Footnotes see page 6 / Fußnoten siehe Seite 6.  
 

Extended scope of supply   
Scope of supply
 
   
 
Material of construction pump
(Details on page 4+5  – 
Cast iron     Cast iron – Stainless steel Stainless steel combinations
      B K E H
      Order code *) Order code *) Order code *) Order code *)
for  NPR2  
Flange connection acc. to  ANSI B16.5          
 
 
F62
 
 —
 
 —
 
 —
 
Discharge at bottom
 
   
 
 
F75
 
 
 —
 
 
 —
 
 
 —
 
Sole plates: – U-beam      F45  —  —  —
                     – flat
 
   
 
P45
 
 —   —   — 
Spray nozzle:
Diameter,  material and norm please add in plain text
    P40 
+ Plain text
+ Klartext
 —  —  —
 
Spray nozzle with piping
(shipped separately)
   
 
 
P41
 
 —
 
 —
 
 —
 
Casing (lobe) purge internal 
 
   
 
 
 
P60
 
 
 —
 
 
 —
 
 
 —
 
Separator
 
   
 
o.r. / a.A.
 
 —   —   — 

Footnotes see page 6 /
 

 

Further technical data   
Weights  •  
Vacuum Pump    Extended scope of supply                      
w/o. partition wall
 
with partition wall
 
       F23              F43             F44              F47              F66             F68 K98
Type appr. / ca. t Type appr. / ca. t appr. / ca. kg  
NPR2 620 15.5 NPR2 626 15.6
2BE4 720 14.2 2BE4 726 14.3 205 780 610 610 98 5.2 98
2BE4 670 11.4 2BE4 676 11.5 170 620 520 520 98 5.2 98
2BE4 620  9.1 2BE4 626   9.2 145 580 450 450 67 5.2 67
2BE4 600  8.2 2BE4 606   8.3 120 540 410 410 67 5.2 67
2BE4 520  6.0 2BE4 526   6.0 105 440 280 280 54 5.2 54
2BE4 500  5.5 2BE4 506   5.5 80 410 260 260 54 5.2 54
2BE4 420  3.4 2BE4 426   3.4 65 250 200 200 30 5.2 30
2BE4 400  2.9 2BE4 406  3.0 45 230 180 180 30 5.2 30
2BE4 320  2.0   40 160 91 91 16 5.2 16
2BE4 300  1.6   30 160 80 80 16 5.2 16

                                                                                         
 

Operating liquid rates              
Operating liquid rates (water) for various inlet pressures (1 m³/h = 4.4 US gpm) :                
Type                    mbar:             160         180        200        250         300        350 400 450 550 600 650 700 800
NPR2 62 m³/h: 43.2 43.2 43.2 43.2 43.2 43.2 22.7 22.7 22.7 22.7 22.7
2BE4 72 m³/h: 40.6 41.4 41.9 42.7 42.3 41.4 39.6 37.2 34.7 31.8 28.8 23.3 19.2
2BE4 67 m³/h: 33.9 34.5 35.0 35.7 35.3 34.5 33.1 31.1 29.0 26.5 24.1 19.5 16.0
2BE4 62 m³/h: 28.8 29.4 29.8 30.4 30.1 29.4 28.1 26.5 24.6 22.6 20.5 16.6 13.6
2BE4 60 m³/h: 23.9 24.3 24.6 25.4 25.4 24.2 23.0 21.5 20.1 18.4 16.9 13.7 10.9
2BE4 52 m³/h: 20.7 21.1 21.4 21.8 21.6 21.1 20.2 19.0 17.7 16.2 14.7 11.9 9.8
2BE4 50 m³/h: 17.0 17.4 17.6 18.3 18.3 17.2 16.6 15.4 14.4 13.2 12.1 9.9 7.8
2BE4 42 m³/h: 11.5 12.0 12.3 12.9 13.1 12.9 12.4 11.7 10.9 9.9 8.9 7.1 5.9
2BE4 40 m³/h: 9.0 9.2 9.5 9.9 9.9 9.5 9.0 8.7 7.9 7.5 6.6 5.3 4.2
2BE4 32 m³/h: 7.2 7.3 7.4 7.6 7.5 7.3 7.0 6.6 6.2 5.6 5.1 4.1 3.4
2BE4 30 m³/h: 5.1 5.3 5.3 5.5 5.6 5.3 5.1 4.9 4.4 4.2 3.7 3.0 2.4

 
 Tolerance + 20 %
 
 

Accessories     
Scope of supply   for type  Material of construction – Weight
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Cast iron Cast iron – Stainless steel -Stainless steel combinations

B K, E                                                      H
Order No. Order No. Order No.

appr.

kg

for  2BE4    
Check valve for N 1.1 incl. mounting set 1)    
 
     
  • in sheet steel/stainless steel
  • in chrome-nickel steel

 
 
 
 

  2BE4 30…32 2BY6 920-1BX08

2BY6 920-1HX08
37
37
2BE4 40…42 2BY6 930-1BX08

2BY6 930-1HX08
56 56
2BE4 50…52 2BY6 935-1BX08

2BY6 935-1HX08
107 107
2BE4 60…62 2BY6 940-1BX08

2BY6 940-1HX08
134 134
2BE4 67…72 2BY6 950-1BX08

2BY6 950-1HX08
o.r./
a.A.
 
Pressure indicator for  measuring of inlet pressure  for gas or operating liquid  (range -1 to +0.6 bar below  or above atmos. pressure)           
   
2BE4 …
 
 
2BX9 012-1HD20
 
 
1
 
 
Foundation blocks (DIN 799-1), incl.  machine screws 
(DIN EN 4017)
1 set = 4 pieces
   
 
 
 
 
 
– M30x280, incl. M20x60   2BE4 30…32 2BX9 008-2 28
– M36x340, incl. M36x90   2BE4 40…52 2BX9 003-1 50
– M42x425, incl. M42x120 
 
  2BE4 60…72
 
2BX9 004-2
 
86
 
for NPR2    
on request     NPR2 62   o.r. / a.A.          
 
                 

 
 1) Attention: reducer needed, take notice of pressure drop.
    

2BE4includes 2B44 30/32, 2BE440/42, 2BE450/52,2BE460/62, 2BE467/72.  They have different connection size. Below lists the size for 2BE4 40/42 for your reference.

2BE4 40./42. -2

 

 

 Type
 
      A            B
  inches / mm
C   D E F
 2BE4 40.     82.8        46.0 43.4   51.7 92.9 46.4
  2102

94.1
    2391       1458

1392  

1169

 

1103

 

1314

 

2359

 

1179

 

57.4

 

54.8

 

63.1

 

104.3

 

52.1

 

1603

2648 1323
 2BE4 42
 
 

Connection      a         b c e
Anschluss   inches / mm    
DIN    59.8     69.3 39.9 11.2
  1520

63.0
1600       1840

1760

 

1014

 

284

 

72.4

 

41.3

 

12.5

 

1048

318
ANSI
 

 
 

Connec-     suitable for DIN EN 1092-2  (mm)   suitable for ANSI B16.5 150 lbs  (inches)  
Anschluss       DN d2 d4 D k z R1 DN d2 d4 D k z
N1.0/ 1.01 Inlet flange   PN10 250 22 320 395 350 12 10 1 12 ¾ 16 14 ¼ 12
N1.1 Flange manifold   PN10 300 22 370 445 400 12 12 1 15 19 17 12
N2.0/ 2.01 Discharge flange   PN10 250 22 320 395 350 12 10 1 12 ¾ 16 14 ¼ 12
N2.2 Flange liquid separator   PN10 300 22 370 445 400 12 12 1 15 19 17 12
N3.0 Connection for  operating liquid   PN16 50 M16 102 125 4 2 3/8* 2
N3.2 Connection for sealing  liquid to stuffing boxes  (external supply only)   Rp ¼             Rp ¼            
N4.0 Drain liquid separator   PN10 150 22 212 285 240 8 6 7/8 8 ½ 11 9 ½ 8
N4.2 Flush and drain openings   PN16 50 M16 102 125 4 2 3/8* 2
N4.3 Connection for leakage liquid   Rp ¾             Rp ¾            
N4.41 Optional connection for internal liquid supply of the shaft seal   Rp ½             Rp ½            
N4.6 Screw plugs for total drain   Rp ½             Rp ½            
N8.7 **) Screw plugs for gauge  connection   Rp ½             Rp ½            

 

 

 NPR2 620

 

 

Connec-     suitable for DIN EN 1092-2  (mm)       suitable for ANSI B16.5 150 lbs  (inches)    
Anschluss                DN d2 d4 D k t z1 z2 R1 DN d2       d4      D      k       t z1 z2
N1.0 Inlet flange   PN10 400 26 482 596 515 38 10 6 16 1 1/8  18 ½ 23 ½ 21 ¼ 1 ½ 10 6
N2.0 Discharge flange   PN10 350 22 430 534 460 38 10 6 14 1 1/8  16 ¼   21 18 ¾ 1 ½ 8 4
N2.01 Discharge flange   PN10 350 22 430 534 460 38 7 9 14 1 1/8 16 ¼     21 18 ¾ 1 ½ 6 6
N3.0 Connection for  operating liquid   Rp 3                       Rp 3                                
N3.2 Connection for  sealing liquid to  stuffing boxes  (external supply only)   Rp 3/8                     Rp 3/8                               
N3.9 Connection for  spray nozzle   Rp 2                       Rp 2                               
N4.3 Connection for  leakage liquid   Rp 1                       Rp 1                               
N4.61
 
Screw plugs for  total drain   Rp ¾                      Rp ¾                               
N4.62 Screw plugs for total drain   Rp 2                       Rp 2                               
N8.6 Screw plugs for  casing inspection   Rp ½                      Rp ½                               
N8.7 Screw plugs for  gauge connection   Rp ¾                      Rp ¾                               
N8.8 Screw plugs for lobe purge   Rp ¾                                             Rp ¾                                                    

 
 

 

After-sales Service: Online Support
Warranty: 12months
Oil or Not: Oil Free
Structure: Rotary Vacuum Pump
Exhauster Method: Positive Displacement Pump
Vacuum Degree: Low Vacuum
Customization:
Available

|

Vacuum Pump

Types of vacuum pumps

A vacuum pump is a device that draws gas molecules from a sealed volume and leaves a partial vacuum in its wake. Its job is to create a relative vacuum within a specific volume or volume. There are many types of vacuum pumps, including centrifugal, screw and diaphragm.

Forward centrifugal pump

Positive displacement centrifugal vacuum pumps are one of the most commonly used pump types in the oil and gas industry. Their efficiency is limited to a range of materials and can handle relatively high solids concentrations. However, using these pumps has some advantages over other types of pumps.
Positive displacement pumps have an enlarged cavity on the suction side and a reduced cavity on the discharge side. This makes them ideal for applications involving high viscosity fluids and high pressures. Their design makes it possible to precisely measure and control the amount of liquid pumped. Positive displacement pumps are also ideal for applications requiring precise metering.
Positive displacement pumps are superior to centrifugal pumps in several ways. They can handle higher viscosity materials than centrifuges. These pumps also operate at lower speeds than centrifugal pumps, which makes them more suitable for certain applications. Positive displacement pumps are also less prone to wear.
Positive displacement vacuum pumps operate by drawing fluid into a chamber and expanding it to a larger volume, then venting it to the atmosphere. This process happens several times per second. When maximum expansion is reached, the intake valve closes, the exhaust valve opens, and fluid is ejected. Positive displacement vacuum pumps are highly efficient and commonly used in many industries.

Self-priming centrifugal pump

Self-priming centrifugal pumps are designed with a water reservoir to help remove air from the pump. This water is then recirculated throughout the pump, allowing the pump to run without air. The water reservoir can be located above or in front of the impeller. The pump can then reserve water for the initial start.
The casing of the pump contains an increasingly larger channel forming a cavity retainer and semi-double volute. When water enters the pump through channel A, it flows back to the impeller through channels B-C. When the pump is started a second time, the water in the pump body will be recirculated back through the impeller. This recycling process happens automatically.
These pumps are available in a variety of models and materials. They feature special stainless steel castings that are corrosion and wear-resistant. They can be used in high-pressure applications and their design eliminates the need for inlet check valves and intermediate valves. They can also be equipped with long intake pipes, which do not require activation.
Self-priming centrifugal pumps are designed to run on their own, but there are some limitations. They cannot operate without a liquid source. A foot valve or external liquid source can help you start the self-priming pump.

Screw Pump

The mechanical and thermal characteristics of a screw vacuum pump are critical to its operation. They feature a small gap between the rotor and stator to minimize backflow and thermal growth. Temperature is a key factor in their performance, so they have an internal cooling system that uses water that circulates through the pump’s stator channels. The pump is equipped with a thermostatically controlled valve to regulate the water flow. Also includes a thermostatic switch for thermal control.
Screw vacuum pumps work by trapping gas in the space between the rotor and the housing. The gas is then moved to the exhaust port, where it is expelled at atmospheric pressure. The tapered discharge end of the screw further reduces the volume of gas trapped in the chamber. These two factors allow the pump to work efficiently and safely.
Screw vacuum pumps are designed for a variety of applications. In some applications, the pump needs to operate at very low pressures, such as when pumping large volumes of air. For this application, the SCREWLINE SP pump is ideal. Their low discharge temperature and direct pumping path ensure industrial process uptime. These pumps also feature non-contact shaft seals to reduce mechanical wear. Additionally, they feature a special cantilever bearing arrangement to eliminate potential sources of bearing failure and lubrication contamination.
Screw vacuum pumps use an air-cooled screw to generate a vacuum. They are compact, and clean, and have a remote monitoring system with built-in intelligence. By using the app, users can monitor pump performance remotely.
Vacuum Pump

Diaphragm Pump

Diaphragm vacuum pumps are one of the most common types of vacuum pumps found in laboratories and manufacturing facilities. The diaphragm is an elastomeric membrane held in place around the outer diameter. While it is not possible to seal a diaphragm vacuum pump, there are ways to alleviate the problems associated with this design.
Diaphragm vacuum pumps are versatile and can be used in a variety of clean vacuum applications. These pumps are commercially available with a built-in valve system, but they can also be modified to include one. Because diaphragm pumps are so versatile, it’s important to choose the right type for the job. Understanding how pumps work will help you match the right pump to the right application.
Diaphragm vacuum pumps offer a wide range of advantages, including an extremely long service life. Most diaphragm pumps can last up to ten thousand hours. However, they may be inefficient for processes that require deep vacuum, in which case alternative technologies may be required. Additionally, due to the physics of diaphragm pumps, the size of these pumps may be limited. Also, they are not suitable for high-speed pumping.
Diaphragm vacuum pumps are a versatile subset of laboratory pumps. They are popular for their oil-free construction and low maintenance operation. They are available in a variety of styles and have many optional features. In addition to low maintenance operation, they are chemically resistant and can be used with a variety of sample types. However, diaphragm pumps tend to have lower displacements than other vacuum pumps.

Atmospheric pressure is a key factor in a vacuum pump system

Atmospheric pressure is the pressure created by the collision of air molecules. The more they collide, the greater the pressure. This applies to pure gases and mixtures. When you measure atmospheric pressure, the pressure gauge reads about 14.7 psia. The higher the pressure, the greater the force on the gas molecules.
The gas entering the vacuum pump system is below atmospheric pressure and may contain entrained liquids. The mechanism of this process can be explained by molecular kinetic energy theory. The theory assumes that gas molecules in the atmosphere have high velocities. The resulting gas molecules will then start moving in random directions, colliding with each other and creating pressure on the walls of the vacuum vessel.
Atmospheric pressure is a critical factor in a vacuum pump system. A vacuum pump system is useless without proper atmospheric pressure measurement. The pressure in the atmosphere is the total pressure of all gases, including nitrogen and oxygen. Using total pressure instead of partial pressure can cause problems. The thermal conductivity of various gases varies widely, so working at full pressure can be dangerous.
When choosing a vacuum pump, consider its operating range. Some pumps operate at low atmospheric pressure, while others are designed to operate at high or ultra-high pressure. Different types of pumps employ different technologies that enhance their unique advantages.
Vacuum Pump

The screw pump is less efficient in pumping gases with smaller molecular weight

Vacuuming requires a high-quality pump. This type of pump must be able to pump gas of high purity and very low pressure. Screw pumps can be used in laboratory applications and are more efficient when pumping small molecular weight gases. Chemical resistance is critical to pump life. Chemical resistant materials are also available. Chemically resistant wetted materials minimize wear.
Gear pumps are more efficient than screw pumps, but are less efficient when pumping lower molecular weight gases. Gear pumps also require a larger motor to achieve the same pumping capacity. Compared to gear pumps, progressive cavity pumps also have lower noise levels and longer service life. In addition, gear pumps have a large footprint and are not suitable for tight spaces.
Progressive cavity pumps have two or three screws and a housing and side cover. They are also equipped with gears and bearings. Their mechanical design allows them to operate in high pressure environments with extremely low noise. The progressive cavity pump is a versatile pump that can be used in a variety of applications.
Dry screw compressors have different aspect ratios and can operate at high and low pressures. The maximum allowable differential pressure for screw compressors ranges from 0.4 MPa for 3/5 rotors to 1.5 MPa for 4/6 rotors. These numbers need to be determined on a case-by-case basis.

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editor by CX 2023-04-26