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Welch Dry Vacuum Pump/Oilless Vacuum Pump 2567B-50 WOB-L NEW 3.5 cfm

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SKU: 40.44174.01

Additional information

Weight 25 lbs
New / Rebuilt

Level of Vacuum

CFM / L/M (Displacement)

Inlet / Exhaust


Power Options


As a Welch distributor, we are proud to offer their full line of PTFE oil-free laboratory dry vacuum pump (oiless vacuum pump) for chemical duty to vacuum pumping acid vapors and corrosive gas, as well as economical standard lab duty, pumps in a range of sizes and vacuum levels for pumping water vapor and non-corrosive gas. The GELMASTER® and SELF-CLEANING DRY VACUUM PUMP SYSTEMS are fully configured for gel drying, and for rotary evaporation and other applications. Finally, the process of Welch oiless vacuum pump (dry vacuum pump) is an economical solution for pumping vacuum dry air.

Dry Vacuum Pump, also known as Oiless vacuum pump

Here at A-VAC Industries, we provide rapid response, high-quality service, and assurance for what we sell, service, and rebuild. Dry vacuum pump and oiless vacuum pump are pumps that do not use any fluids or oil to create a vacuum. Choose from the best quality manufacturers for all of your oilless vacuum pump needs such as, Edwards, Agilent Varian, Alcatel Adixen Pfeiffer, Leybold, Anest Iwata, and Welch. Our factory-trained technicians will repair your high vacuum equipment to meet or exceed OEM specifications utilizing the highest quality parts, products, oil, process, experience, and expertise around.

Dry Vacuum Pump / Oilless Vacuum Pump Provide Quiet Operation with a wide range of applications

Most vacuum pumps using oils can make maintenance a difficult experience. The hassle of waste oil disposal and the smell of odors can put off anyone using the vacuum pump. Oiless vacuum pumps, also known as dry vacuum pumps, have become a popular alternative for mess-free and easy cleanup as well as being quiet vacuum pumps with a high variety of different product pump available.

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Welch Dry Vacuum Pump/Oilless Vacuum Pump 2567B-50 WOB-L NEW 3.5 cfm Specifications


  Standard Duty Vacuum Pumps
Free Air Displacement  
CFM (L/min) @ 60Hz 3.5(100)
m3/hr (L/min) @ 50Hz 4.9(83)
Ultimate Pressure, Torr (mbar) 60(80)
Max Pressure PSIG (pascal) –––––––––
Maximum Vacuum, in. Hg 27.6
Motor Horsepower (watts) 1/3(250)
Tubing Needed, I.D. in. (mm) 3/8(10)
Intake/Exhaust Thread NPT 1/4
Weight (lbs.) 16.5
Overall Dimensions  
L in. (cm) 15.0(38.1)
W in. (cm) 10(25.4)
H in. (cm) 10(25.4)
Ship Weight, lbs. (kg) 24(10.9)
Shipping Carton Dimensions 21.5 x 12.5 x 16
L x W x H in. (cm) (55 x 32 x 41)
Oil free pump

Click Below for Specification Sheet

Welch Oil-free Pumps