DirecTorr Vacuum Pumps

From $2,543.95
List Price From $2,855.00

These Welch Directorr Vacuum Pumps offer steady, non-fluctuating vacuum to 0.4 µ Hg. Units operate at sound levels less than 60dBA and easily fit on most lab benches. Anti-suck-back valve protection ensures vacuum integrity. Pumps accept standard hose or ISO flange connectors.

Viton® O-rings and seals resist chemical attack; reliable seal design tolerates high-vapor loads. Modular doweled construction ensures continuous peak performance and easy maintenance. Made in USA.

Key Features

  • Ideal for providing vacuum to centrifugal concentrators, vacuum ovens, freeze dryers, SEMs or transfer lines
  • Exceptionally quiet and portable
  • 12-month warranty
Specifications for Welch Vacuum Direct Drive High-Vacuum Pumps
  1/4 HP Pump 3/4 HP Pump
Free Air Displacement @ 60 Hz: 1.8 cfm (51 L/min.) 7.7 cfm (218 L/min.)
Max. Vacuum: 2 x 10-3 Torr 3 x 10-4 Torr
Pump Speed @ 60 Hz: 3450 1725
Inlet Tubing: 7/16" I.D. 13/16" I.D.
Sound Level: 52 dB(A) 54 dB(A)
Dimensions (LxWxH): 14.1" x 5.1" x 8.4" 20.5" x 7.1" x 10.7"
Power Requirements: 115V, 60Hz 115V, 60Hz
Ship. Wt.: 26 lb. 68 lb.
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Cat # Description Units Of Measure Availability Price Quantity
EF20961C8905A
1/4 HP pump
  • $2,543.95
  • List: $2,855.00
EF20961F8920A
3/4 HP pump
  • $3,819.95
  • List: $4,284.00
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