Products
Vacuum Pumps
Vacuum Gauges and Controllers
Vacuum Pump Oils
Applications
Mass Spectrometry
Botanicals Processing
HVAC Pumps
Rotary Evaporator
Vacuum Concentrator
Vacuum Manifold
Freeze Dryer
Vacuum Oven
Vacuum Filtration
Vacuum Distillation
Aspiration (Cell Culture)
Glove Box
Gel Dryer
Vacuum Measurement & Control
Pick & Place
Vacuum Workhholding
DEGASSING / DESSICATOR
Gas Analysis
Vacuum Leak Detection: Methods, Tools & Tips
Service
Maintenance Kits
FAQ
About Us
News
Careers
History
Our Values
Downloads
Global Presence
Back to the product list

Piston PumpsWOB-L® 2581

Item# 2581B-50 2581B-24 2518C-24

The Welch Piston Pump WOB-L 2581 is engineered for robust and efficient vacuum performance, ideal for laboratory and industrial applications. Discover more WOB-L Piston Pumps on our category page.

Delivery time will be confirmed in the order

The WOB-L® 2581 dry piston pump is ideal for pumping water vapor, and for applications with vacuum requirements above 6.7 mbar. The pump provides continuous, reliable, high flow vacuum. It is light and compact. Its oil-free operation reduces maintenance. Pump comes with inlet liquid trap, mounted vacuum gauge and vacuum regulator.

Note: pump is not recommended for pumping organic, acidic and basic vapors.

Article Number

U2581C-50

Max. pumping speed at 50 Hz in m³/h (l/min)

4.9 (81.7)

Max pumping speed at 60 Hz in m³/h (l/min)

6 (100)

Max. pumping speed at 60 Hz in cfm (l/min)

3.5 (100)

Ultimate pressure in mbar (Torr)

6

Wired for

230V, 50Hz

Dimensions (W/D/H) in mm

432/191/305

Weight kg (lbs)

11.2 (24.7)

*Without handle
  • Replacement container (Glas) for WOB-L® 2561, 2567, 2581, 2585 - U1415B
  • Connection-Kit 5 for Vacuum oven - 404005
  • Connection-Kit 6 - 404006
  • Maintenance Kit for WOB-L® 2581 - U2581K-03
  • Seal Kit for WOB-L® 2581 - U2581K-04
  • Vacuum regulator for WOB-L® 2581, 2585 - U2585K-50
  • Post-Pump Protection - Exhaust Silencer for WOB-L® 2581 - U1412E