Diaphragm Vacuum Pumps

Diaphragm pumps utilize a flexible pocket to transfer gases. The repeated expanding / collapsing of the diaphragm pocket combines with one-way valves on either side of the diaphragm to move gas. The movement of the diaphragm is created by a piston's rise and fall.

The use of chemically resistant (e.g.fluorocarbon) materials in the diaphragm construction can produce pumps that are highly resistant to chemical attack.  Welch offers a variety of chemical resistant diaphragm vacuum pump designs for Laboratory Applications.

Click Catalog No. for more information
 Model / image Flow, L/min Ult. Vac, torr Application Catalog No. 2014 Price

2019 Diaphragm Vacuum Pump

37 150
  • Vacuum filtration
  • SPE

2019B-01

$795

 

 Model / image Flow, L/min Ult. Vac, torr Application Catalog No. 2014 Price

2014 Diaphragm Vacuum Pump

35 40
  • Vacuum filtration
  • SPE
  • Rotary evaporation of volatile solvents

2014B-01

$1360

  

Model / Image Flow, L/min Ult. Vac, torr Application Catalog No.

 2014 Price

DryFast Hi-flow Diaphragm Vacuum Pumps

50 35
  • Vacuum filtration- multiple funnels

2037B-01

$2090
70 35
  • Vacuum filtration- multiple funnels
  • Vacuum ovens
  • Automated systems
  • Aspiration

2047B-01

$2470

 

Model / Image Flow, L/min Ult. Vac, torr Application Catalog No.

 2014 Price

DryFast 9 torr Diaphragm Vacuum Pumps 25 9
  • Rotary evaporation of mid-volatility solvents - to 1 liter

2034B-01

$2090
35 9
    • Rotary evaporation of mid-volatility solvents - to 10 liter
    • DNA pelleting

      2044B-01

      $2470

       

      Model / Image Flow, L/min Ult. Vac, torr Application Catalog No.

       2014 Price

      DryFast Ultra - 2 torr Diaphragm Vacuum Pumps 25 2
      • Rotary evaporation of low-volatility solvents - to 1 liter

      2032B-01

      $2710
      35 2
        • Rotary evaporation of low-volatility solvents - to 10 liter
        • Small vacuum ovens
        • Centrifugal concentrators

        2042B-01

        $3060

         

        Model / Image Flow, L/min Ult. Vac, torr Application Catalog No.

         2014 Price

        High Capacity - 4 head Diaphragm Vacuum Pumps 100 6
        • Rotary evaporation of mid-volatility solvents - to 20 liter

        2054B-01

        $3935
        65 1.5
          • Rotary evaporation of low-volatility solvents - to 20 liter
          • Vacuum ovens
          • Centrifugal concentrators

          2052B-01

          $3755

           

           Model / Image Flow L/min Ult. Vac, torr Application Catalog no. 2014 Price
          High Capacity - 8 head Diaphragm Vacuum Pumps 173 6
          • Evaporation of mid-volatility solvents - scale-up 

          2064B-01

          $4995
          221 56
          • Multiple user filtration / utility vacuum network

          2067B-01

          $5595
          116 1.5
          • Rotary evaporation of low-volatility solvents - scale-up
          • Vacuum ovens
          • Centrifugal concentrators

          2062B-01

          $4495