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DuoSeal Belt Driven Oil Seal Vacuum Pumps

Welch's DuoSeal Belt Driven Oil Seal Vacuum Pumps
DuoSeal Belt-Drive High Vacuum Pumps
  • Two-stage rotary vane high vacuum pumps for quicker and more efficient vacuum pumpdowns
  • Belt driven oil-seal design lowers RPM and maintenance

 

Welch DuoSeal Vacuum Pumps' rugged design makes them long lasting and durable even under harsh operation conditions. The Model 1397 and 1374 vacuums have a high flow-rate of 17.7 CFM and 23 CFM respectively, making them ideal for deep evacuation of larger chambers.

Ordering Information
Pump Type Ilmvac # Cat. # Price
DuoSeal 1374B-01 7906-21 Price
DuoSeal 1397B-01 7906-56 Price
Specifications 7906-21 7906-56
Free Air Displacement
  cfm 23 17.7
  l/min. 650 500
Utl. Pressure, torr (mbar) 1x10-4 (0.00013) 1x10-4 (0.00013)
Gas Ballast Yes Yes
Pump RPM 510 400
Motor Horsepower 1-1/2 (1120) 1 (750)
Oil Capacity, qt. (liters) 1.25 (1.2) 1.25 (1.2)
Tubing Needed, I.D. in. 1-5/8 (41) 1-5/8 (41)
Intake, Nipple Thread 1.75-20 1.75-20
Exhaust, Thread Type 1.75-20 1.75-20
Weight, lbs. (kg) 220 (100) 205 (93)
Overall Dimensions
  L in. (cm) 26 (66) 26 (66)
  W in. (cm) 13.7 (34.8) 13.7 (34.8)
  H in. (cm) 18.8 (47.6) 18.8 (47.6)
Ship Weight, lbs.(kg) 215 (97.7) 213 (96.8)
 

Application Guide

  • Large Vacuum Ovens & Furnaces
  • Large Chamber Evacuation
  • Vacuum Bagging
  • Degassing
  • Vacuum Distillations
  • Vacuum Drying
  • Concentration Applications

 


Required Exhaust Filter
Standard Exhaust Filter
Use With Pump Diameter Height Ilmvac # Cat. # Price
1397B-01 5.0” (127) 9.0” (229mm) 1417P-20 7906-35 Price
1374B-01 5.0” (127) 9.0” (229mm) 1417P-20 7906-35 Price

File Type File Name Publication Date
White Paper (PDF) Improving Vacuum Performance
02/29/2016
White Paper (PDF) WelchNet Alternative to House Vacuum
02/29/2016
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