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Clean operation (oil free), low cost of ownership, highest reliability – these are just a few benefits that customers can appreciate when they use a diaphragm pump for laboratory or industrial applications. With a broad range of diaphragm pumps – ultimate vacuum from 75 to 1 mbar and peak flow rates up to 138 l/min – Welch offers specific pump families and models for a variety of uses.


Diaphragm pumps work completely without oil which has several advantages for the user:

  • Less maintenance compared to other technologies saves time and money
  • Dry vacuum allows cleaner workplace and environment
  • Uncontaminated pumping of gases results in cleaner samples and no risk of oil back-streaming


Overview of Welch Diaphragm Pump Families

DryFast BTpro
Self-Cleaners
High-Capacity
XPRF
Free Air Displacement, cfm
0.9 to 2.5 1.4 to 6 1.2 2.3 to 7.8 4.5 to 6.9
Ultimate Vacuum, torr 40 to 9
15 to 6
9 to 2
56 to 1.5 100 to 25
Chemical Resistant? Yes
Yes
Yes
Yes
Yes
Self-Cleaning Feature? No
No
Yes
No
No
Tunable Vacuum? Yes Select Models Yes
No
No
Explosion-Proof Motor?
No No
No
No
Yes

Clean operation (oil free), low cost of ownership, highest reliability – these are just a few benefits that customers can appreciate when they use a diaphragm pump for laboratory or industrial applications. With a broad range of diaphragm pumps – ultimate vacuum from 75 to 1 mbar and peak flow rates up to 138 l/min – Welch offers specific pump families and models for a variety of uses.


Diaphragm pumps work completely without oil which has several advantages for the user:

  • Less maintenance compared to other technologies saves time and money
  • Dry vacuum allows cleaner workplace and environment
  • Uncontaminated pumping of gases results in cleaner samples and no risk of oil back-streaming

Dryfast

BTpro

Self Cleaners

High Capacity

Explosion Proof Motor

en-BD