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Welch 2090W Explosion Proof Diaphragm Pump

2901w-01 with Explosion Proof Motor

Product Description

The Welch 2090W explosion proof diaphragm pump is a quality vacuum pump that is dry and oil-free and ideal for clean processing application needs. This Welch 2090w-01 is chemical and corrosion resistant.

  • Corrosion Resistant
  • Free Air Displacement of 127 l/min (4.5 cfm)
  • Ultimate Vacuum Pressure 29″ Hg (25 torr)
  • Fitted Explosion Proof Motor (Class I, Groups C & D; Class II Groups F & G) with CSA/UL Mark
  • Excellent for Ethanol evaporation process where cUL mark, explosion proof motor is required.

Important: Always use a certified electrician for proper installation of pumps with explosion proof motors. Conduit wiring required. No cord, plug, or switch included. 

FAD, liters/min (cfm) 127 (4.5)
Ultimate Pressure, Torr 25
Max. Vac., in. Hg 29
Head Material Coated PTFE
Diaphragm liner PTFE
Valves Stainless Steel
Inlet/Outlet connection NW25
Motor Type Ex Proof1
Motor HP  1/2
Electrical requirement 115/230V 60Hz 1Ph
Weight, lbs (kg) 54 (25.5)
Dimensions, LxWxH 24.6 x 11.1 x 11.3


These Welch vacuum diaphragm pumps deliver 4.5 CFM (127 liters/minute) with an ultimate base pressure of 25 Torr. The 2090w-01 has an explosion proof  motor.

115/230V 60 Hz, 1 Phase

Part number 2090W-01

Come with full Welch Vacuum warranty


 Data Sheet

For more documentation, please visit DigiVac’s folder.

Product Inquiry

Welch 2090W Explosion Proof Diaphragm Pump 2090w-01
Welch 2090W Explosion Proof Diaphragm Pump, 4.5 CFM 2090W-01
Original price was: $6,930.00.Current price is: $6,495.00.