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Welch

DuoSeal® High Vacuum Pumps

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DuoSeal® High Vacuum Pumps

Additional Views

  • Famous Durability
  • Deep Vacuum to 10-4 torr
  • Low RPM for cooler operation

Address a wide variety of laboratory vacuum needs with these rugged oil-seal pumps. Use DuoSeal vacuum pumps for Schlenk drying manifolds, freeze drying, vacuum ovens, glove boxes, degassing, concentrations, distillations, and more.

DuoSeal pumps are built to rigorous quality standards with precisely machined components. The belt-driven design produces low pump rpm operation, reducing friction, oil temperature, and oil degradation to extend maintenance intervals and pump life. Large oil reservoir minimizes contaminant effects to maintain high vacuum performance. Use of a cold trap is recommended to protect the pump and enhance vacuum levels. Do not operate continuously at pressures greater than 10 torr.

DuoSeal two stage pumps provide deep vacuum (1 X 10-4 torr) at pumping speeds ranging from 25 to 650 L/min (0.9 to 23 CFM). DuoSeal single stage pumps provide economical vacuum to 0.015 torr.

See Additional Info tab for model selection to find the best DuoSeal pump to suit your application needs.

Thomas No. Displacement L/min. (CFM) Pressure TORR H.P. RPM OIL Capacity Tubing NEEDED
7893Q10 25 (0.9) 1x10-4 1/3 580 0.62 qt 7/16"
7893Q13 90.6 (3.2) 1x10-4 1/2 525 2.25 qt 7/16"
7893Q16 160 (5.6) 1x10-4 1/2 525 2.25 qt 13/16"
7893Q19 300 (10.6) 1x10-4 1 525 2.5 qt 13/16"
7893Q21 500 (17.7) 1x10-4 1.5 400 1.25 qt 1 5/8"
7893Q24 650 (23) 1x10-4 2 510 1.25 qt 1 5/8"
7893Q27 35 (1.2) 1.5x10-2 1/3 750 0.5 qt 7/16"

For 230V model specifications, see referenced 115V model in chart.

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Product Detail
Thomas No.
7893Q27
Mfr. No.
1399B-01
Description
Duoseal Pump, 35L/min, 115V 60Hz, 1 Stage

list price/quantity total
$0.00
Thomas No.
1233K99
Mfr. No.
1399C-02
Description
Duoseal Pump, 35L/min, 230V, 1 Stage

list price/quantity total
$0.00
Thomas No.
7893Q10
Mfr. No.
1400B-01
Description
Duoseal Pump, 25L/min, 115V 60Hz

list price/quantity total
$0.00
Thomas No.
7893Q13
Mfr. No.
1405B-01
Description
Duoseal Pump, 90L/min, 115V 60Hz

list price/quantity total
$0.00
Thomas No.
1233L04
Mfr. No.
1405C-02
Description
Duoseal Pump, 90L/min, 230V

list price/quantity total
$0.00
Thomas No.
7893Q16
Mfr. No.
1402B-01
Description
Duoseal Pump, 160L/min, 115V 60Hz

list price/quantity total
$0.00
Thomas No.
1233L02
Mfr. No.
1402C-02
Description
Duoseal Pump, 160L/min, 230V

list price/quantity total
$0.00
Thomas No.
7893Q19
Mfr. No.
1376B-01
Description
Duoseal Pump, 300L/min, 115V 60Hz

Thomas Scientific Bonus Item
list price/quantity total
$0.00
Thomas No.
1233K96
Mfr. No.
1376C-03
Description
Duoseal Pump, 300L/min, 230V

list price/quantity total
$0.00
Thomas No.
7893Q21
Mfr. No.
1397B-01
Description
Duoseal Pump, 500L/min, 115V 60Hz

list price/quantity total
$0.00
Thomas No.
1233K98
Mfr. No.
1397C-03
Description
Duoseal Pump, 500L/min, 230V

list price/quantity total
$0.00
Thomas No.
7893Q24
Mfr. No.
1374B-01
Description
Duoseal Pump, 650L/min, 115V 60Hz

list price/quantity total
$0.00
$0.00 (0 Items)

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