RAM-GJ Gas Whispair Positive Displacement Blowers - Dresser ROOTS

RAM-GJ Gas Whispair®


The RAM WHISPAIR line of standard rotary positive gas pumps is intended for use with non-corrosive gases. The gas pumps have a proprietary design that reduces noise and power loss by utilizing an exclusive wrap-around flange and jet to control pressure equalization - eliminating rapid backflow of gas into the pump from the discharge area. The standard model is designed using integral-shaft ductile iron impellers with an involute profile. Alloy steel timing gears are taper mounted on the shafts, and cylindrical roller bearings are used. Both ends of the unit are splash oil lubricated. A hydrodynamic seal on the drive shaft prevents shaft seal oil leaks. The casing and headplates are grey iron on standard units, while the drive end cover and gear cover are aluminum. Piston ring seals form labyrinth between the compression chamber and cored vent cavities. The vent cavities are plugged for purge or drain.Special long-life mechanical seals and viton O-rings are installed at each bearing to control gas and oil leakage, and are suitable for vacuum or pressure service. Each seal incorporates a unique geometry that promotes the flow of oil, air and vapor across theback of the stainless steel seat to enhance cooling and extend seal life. All frame sizes are designed with detachable ruggedsteel mounting feet which permit in-field adaptability to either vertical or horizontal installation requirements.

  • Flow Rates: 140 - 3550 ICFM (238 - 6031 m179;/hr)
  • Pressures No more than 18 PSI (No more than 1241 mbar)
  • Vacuum: No more than 16 INHgV (No more than 542 mbar)
  • Horsepower:3 - 170 bhp (2.2 - 127 kw)

Frame Sizes:

404J, 406J, 409J, 412J, 418J, 616J, 624J


Special Internet Pricing! Please Call for Details 630-372-9222