Direct-Drive Rotary Vane Vacuum Pumps

CRVpro vacuum pumps are two-stage direct-driven vacuum pumps. 

They are nine models of CRVpro available with free air displacement from 1.8 cfm to 52.5 cfm.  Ultimate pressure to 2x10⁻³ torr. Three models of pumps with explosion proof motors, with free air displacements from 2.8 to 12.8 cfm, are available by clicking on the "Explosion Proof" tab below.

The benefits of CRVpro pumps are:

• reduced risk of chemical attacks and oil breakdown by diluting chemical vapors with a larger oil chamber
• slowing down corrosion by cool running operation
• provides a measure of protection from sublimed chemical vapors with coating on pump module and oil case.

These benefits lead to extended service interval.

Depending on model, motor options include 1 Ph TEFC,  3 Ph TEFC,  and 1 Ph ex proof motors.

Welch vacuum pump oil is specifically formulated for the unique needs of vacuum pumps. Use of non-Welch vacuum pump oil voids any performance claims and product warranties.

In Duoseal belt driven rotary vane pumps, use Welch Duoseal or Welch Gold Oil

In CRVpro rotary vane pumps use Welch premium or Welch gold oil

In Chemstar belt driven rotary vane pumps use Welch gold oil

CRVpro vacuum pumps can be used for freeze drying, vacuum ovens, concentrators, glove boxes, schlenk lines, HVAC/refrigeration service, coaters, backing diffusion pumps and turbo molecular pumps, short path, wiped film, metallurgy/vacuum furnaces, lamp manufacture, space simulation, degassing, vessel/chamber evacuation. CRVpro vacuum pumps prepared with perfluoropolyether (PFPE) for oxygen service are available. Contact your local Welch sales representative for details on PFPE prepared pumps and for selecting correct vacuum pump for your application.