GE X2 Brochure

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GE Oil & Gas
Roots
*
Rotary Lobe Positive
Displacement Blowers
Universal RAI
*
Series | RAM
*
Series | RCS
*
Series | DVJ and DPJ Series
Bi-Lobe Principle
URAI, URAI-DSL, URAI-G, RAM, RCS Series
Two figure-eight lobe impellers mounted on parallel
shafts rotate in opposite directions. As each impeller
passes the blower inlet, it traps a finite volume of air and
carries it around the case to the blower outlet, where
the air is discharged. With constant speed operation, the
displaced volume is essentially the same regardless of
pressure, temperature or barometric pressure. Timing
gears control the relative position of the impellers to
each other and maintain small but finite clearances.
This allows operation without lubrication being required
inside the lobe cavity.
Operating Principles
WHISPAIR
*
Principle
URAI-J, URAI-J DSL, RAM-J, RAM-GJ, RAM-VJ, RCS-J
Incoming air is trapped by the impellers. Simultaneously,
pressurized air (right) is being discharged. As the impeller
passes the wrap-around flange, the Whispair jet
equalizes pressure between trapped air and discharge
area, aiding impeller movement and reducing power.
Impellers move air into the discharge area. Backflow is
controlled, resulting in reduction of noise and pulsation
relative to conventional blowers.
DVJ/DPJ Principle
2504 DVJ, RAM DVJ, 721 DVJ, 406 DPJ
Incoming air is trapped between the impellers.
Simultaneously, pressurized air is being discharged.
As the impeller passes the jet plenum, cooled, pressurized
air flows into the space between the impeller and cylinder.
This cools the trapped air, helps control thermal growth
and allows higher pressure ratios. The trapped air is then
moved into the discharge flange. Backflow is reduced,
resulting in lower operating noise level and reduced
shock loading on the equipment.
Warranty
Proven designs, manufacturing and material provide
assurance for superior operation. Local, factory trained,
service centers offer timely response to your unique
needs. Roots products are sold subject to GE’s general
terms of sale and warranty policy; contact your nearest
GE office for more information.
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Summary of Contents

Page 1 - Displacement Blowers

GE Oil & GasRoots* Rotary Lobe Positive Displacement BlowersUniversal RAI* Series | RAM* Series | RCS* Series | DVJ and DPJ Series Bi-Lobe Prin

Page 2 - Universal RAI DSL Blower

10 RCS Series Blower Performance Table RCS-J Series Blower Performance TableFrameSizeSpeedRPM4 psi 6 psi 8 psi 10 psi 12 psi 15 psi Max VacuumCFM BHP

Page 3

11AF – INLETAF’ - DISCHARGEINLETDISCH.INLETDISCH.OUBRCDAPO’D1P’AX AXA’+.000-.001ORCBUDLEFT DISCHARGE RIGHT DISCHARGEPP 'AA'D1AX AXO'+.

Page 4

12These units feature an integral discharge jet plenum design, allowing cool, atmospheric air to flow into the casing. This unique design permits cont

Page 5 - Universal RAI Dimensions

13FrameSizeSpeedRPMMax. FreeAir CFM12" HGV 16" HGV 20" HGVCFM BHP CFM BHP CFM BHP2504J240017047 2.1 36 2.8 21 3.52655 56 2.3 44 3.1 30

Page 6 - RAM-GJ Gas WHISPAIR Blower

14VERTICAL CONFIGURATIONHORIZONTAL CONFIGURATIONTop Discharge OnlyAF – INLETAF’ – DISCHARGEU+.000-.001OR’BCRAW – SYSTEM AIR INLETDISCH.INLETINLETPAA’A

Page 7

15Confi gurations Roots blowers are available in two basic configurations to meet nearly any piping arrangement or installation requirement. Orientati

Page 8 - RAM Blowers Dimensions

GEA20317_ Roots Small Rotary BlowersRev 9.2012 GE Oil & Gas16240 Port Northwest Dr., Suite 100Houston, Texas 77041-2645Inside US T: +1 877.363.766

Page 9 - RCS-J WHISPAIR Blower

2All Universal RAI (URAI) series blowers are heavy duty rotary blowers in a compact, sturdy design engineered for continuous duty and maximum reliabil

Page 10

3FrameSizeSpeedRPM1 psi 6 psi 7 psi 10 psi 12 psi 13 psi 14 psi 15 psi Max VacuumCFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP &qu

Page 11 - RCS-J Blowers Dimensions

4FrameSizeSpeedRPM1 psi 3 psi 5 psi 7 psi 11 psi 13 psi 14 psi 15 psi Max VacuumCFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP "

Page 12 - RAM DVJ Vacuum Blower

5Frame SizeABCDrive Shaft LocationsOO1PP1R U KeywayInlet & Disch. Dia.AXApprox. Net Wt. (lbs.)DD1D2225.135.00 9.75 3.75 6.25 3.75 9.63 6.88 6.25

Page 13 - DPJ Blower Performance Table

6Roots RAM series units are recognized by many as the most volumetrically efficient blowers in the industry. Unless otherwise noted, RAM series equipm

Page 14 - 721 DVJ Blower Dimensions

7 RAM, RAM-J and RAM-GJ Blower Performance Table RAM-VJ Water Sealed Vacuum Blower Performance TableFrameSizeSpeedRPM4 psi 6 psi 8 psi 10 psi 12 psi

Page 15 - Typical Application Packages

8AF - INLETAF’ - DISCHARGEOABRDUCA’AXP’AXO’D1P+.000-.001RIGHT DISCHARGEBOTTOM DISCHARGETOP DISCHARGEFrameSizeAA’BCDrive ShaftLocationO O’ P P’ R U Key

Page 16 - Rev 9.2012

9 Roots RCS series units are heavy-duty units with integral-shaft ductile iron impellers in an involute profile. The headplates, gear cover, drive e

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