Welch Vacuum Pump Selection Guide
Reference the Pump Technologies illustration to ensure you have the best understanding of your vacuum pump. The Pump Quick Selection Chart can be used as an efficient guide to purchasing the correct pump depending on your intended application. This chart provides quality information for common laboratory applications and practices.
Pump Technologies
Features:
- Chemical Resistant
- Vacuum to 0.75 Torr
- Oil-Free
- DC Motor Option on select models
- Shop the Welch DryFast Diaphragm Pump, 2037B-01
Features:
- Moderate Vacuum/Pressure
- Wide Flow Range
- General Vacuum Usage
- Oil-Free
- Vacuum to 5 Torr
- Shop the Welch WOB-L Pump, 2567B-50
Features:
- Compact Oil-Seal Design
- Deep Vacuum
- Quiet
- Portable
- Shop the Welch CRVpro Rotary Vane Pump, 3041-01
- Also available with Explosion Proof Motor or Chemically Resistant
Features:
- Deep Vacuum
- Rugged Oil-Seal Design
- Good Chemical Tolerance
- Advanced Chemical Resistance Option
- Shop the Welch ChemStar Belt-Drive Pump, 1402N-01
Features:
- Deep Vacuum
- Oil-Free
- Advanced Chemical Resistance
- Plug and Play
Application Selection Guide
Types of Applications:
- Volatiles
- Low B.P.
- Samples 0-5 Liter
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
ATMOSPHERIC BOILING POINT:
EXAMPLE
SOLVENTS:
ROTO-VAP
FLASK VOLUME:
Self Cleaning System with Regulator, Gauge, Condensate Jars
35L/min.
9 torr (12mbar)
9 torr (12mbar)
35L/min.
9 torr (12mbar)
35L/min.
2 torr (2.7mbar)
80°C
110°C
110°C
Methylene chloride, Chloroform, Ethanol
Trichloroethylene, n-Propyl alcohol, Heptane, Water, Toluene, Acetic Acid
Trichloroethylene, n-Propyl alcohol, Heptane, Water, Toluene, Acetic Acid
1L, 2L,
10L, 20L
10L, 20L
1L, 2L,
10L
20L
DryFast Collegiate Diaphragm Pump
35L/min.
40 torr
(53mbar)
40 torr
(53mbar)
80°C
Methylene chloride, Chloroform, Ethanol
1L, 2L,
10L, 20L
10L, 20L
Types of Applications:
- DMF
- Toluene
- Other Non-Volatiles
- Samples 0-5 Liter
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
ATMOSPHERIC BOILING POINT:
EXAMPLE
SOLVENTS:
ROTO-VAP
FLASK VOLUME:
Self Cleaning System Programmable with
Condensate Catchpots
Condensate Catchpots
35L/min.
2 torr (2.7mbar)
2 torr (2.7mbar)
35L/min.
2 torr (2.7mbar)
35L/min.
2 torr (2.7mbar)
35L/min.
2 torr (2.7mbar)
110°C
160°C
160°C
160°C
Trichloroethylene, n-Propyl alcohol, Heptane, Water, Toluene, Acetic Acid
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
1L, 2L,
10L, 20L
10L, 20L
1L, 2L,
10L
10L
10L
High-Capacity PTFE
Diaphragm Pumps
Diaphragm Pumps
65L/min.
1.5 torr
(2mbar)
1.5 torr
(2mbar)
160°C
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
DMF
Pentanechloroethane
20L
High-Capacity
Diaphragm Pumps
Diaphragm Pumps
119L/min.
1.5 torr
(2mbar)
1.5 torr
(2mbar)
160°C
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
DMF
Pentanechloroethane
20L
DryFast Ultra PTFE Pump
35L/min.
2 torr (2.7mbar)
2 torr (2.7mbar)
35L/min.
2 torr (2.7mbar)
25L/min.
2 torr (2.7mbar)
110°C
160°C
160°C
Trichloroethylene, n-Propyl alcohol, Heptane, Water, Toluene, Acetic Acid
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
1,1,2,2, - Tetrachloroethane
DMF
Pentanechloroethane
1L, 2L,
10L, 20L
10L, 20L
1L, 2L,
10L
1L, 2L
Types of Applications:
- DNA Pelleting
- SpeedVac® & CentriVap®
- Process Applications
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
Types of Applications:
- Schlenk Line
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
ChemStar Pumps
1400N-01
If interested, please contact
us for more information.
If interested, please contact
us for more information.
25L/min.
<1 millitorr
(1.3x10-4 mbar)
<1 millitorr
(1.3x10-4 mbar)
Types of Applications:
- Ultimate Vacuum Below 0.1 mbar
- Preserve Food & Pharmaceuticals
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
VAPORS:
FREE AIR DISPLACEMENT AT 60Hz:
CRVpro Direct Drive Rotary
Vane Vacuum Pumps
Vane Vacuum Pumps
Chemical Vapors
Chemical Vapors
Chemical Vapors
Chemical Vapors
Chemical Vapors
Chemical Vapors
67L/min.
67L/min.
100L/min.
133L/min.
133L/min.
160L/min.
Types of Applications:
- Separate a Solid Product from a Liquid Mixture or Solvent
- Sample Preparation
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
VACUUM REGULATION:
# OF FILTERS:
FILTRATION SOLVENT/MEDIA:
CHEMICAL EXAMPLES:
Types of Applications:
- Cell Harvester
- Plate Washer
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
Types of Applications:
- Aspiration
- Removal and Disposal of Liquids
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
Welch Aspiration Station - With gauge, regulator, 1200 mL autoclabable trap with liquid blockage system
34L/min.
27.2 in. Hg (93mbar)
27.2 in. Hg (93mbar)
Types of Applications:
- Drying
- Degassing
- Moisture Determination
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
VACUUM OVEN VOLUME:
Types of Applications:
- Dry Sequencing Gels
UNIT:
RECOMMENDED WELCH VACUUM PUMP/SYSTEM:
MODEL #:
FLOW RATE x VACUUM:
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