S UMMARY S PECIFICATIONS. Dresser ROOTS Small Rotary Lobe Positive Displacement Blowers. Operating Principles

Transcription

1 S UMMARY S PECIFICATIONS Dresser ROOTS Small Rotary Lobe Positive Displacement Blowers Operating Principles Bi-Lobe Principle 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. WHISPAIR Principle Incoming air is trapped by the impellers. Simultaneously, pressurized air (right) is being discharged. As the lower impeller passes wrap-around flange, Whispair jet equalizes pressure between trapped air and discharge area, aiding impeller movement and reducing power. Impellers move air into the discharge area (right). Backflow is controlled, resulting in reduction of noise relative to conventional blowers. Contents Operating Principles & Warranty Universal RAI Series Description Universal RAI Performance Tables Universal RAI Dimensions RAM Series Description RAM Series Performance Tables RAM Series Dimensions RCS Series Description RCS Series Performance Tables RCS Series Dimensions DVJ & DPJ Products Description DVJ & DPJ Performance Tables DVJ & DPJ Dimensions Configurations & Typical Application Packages Warranty Universal RAI and RAM -J blowers come with 24 month operational warranties (30 months from shipping*), all other blowers come with month operational warranties (1 months from shipping*) on all parts and workmanship. Full details are supplied in Warranty Policy WP POSITION 1 POSITION 2 POSITION 3 *The additional six months is allowed for shipping and special installation where approved in advance. DVJ/DPJ Principle Position 1: Incoming air is trapped between the impellers. Simultaneously, pressurized air is being discharged. Position 2: As the upper 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 discharge pressures. Position 3: The trapped air is then moved into the discharge flange (left). Backflow is reduced, resulting in lower operating noise level and reduced shock loading on the impellers. S-SRBS rev.060

2 Universal RAI Series Rotary Positive Displacement Blowers Basic Equipment Description All Universal RAI (URAI) series blowers are heavy duty rotary blowers in a compact, sturdy design engineered for continuous and maximum reliability. These blowers have grease lube on the drive-end with splash oil lube on the gear end. Roots exclusive figure- gearbox design improves oil distribution and lengthens bearing and gear life. This series features a grey iron casing, carburized and ground alloy steel spur timing gears secured to steel shafts with a taper fit and locknut, and grey iron involute impellers. Oversized anti-friction bearings are used, with a heavy duty cylindrical roller bearing at the drive shaft to withstand V-belt pull. Universal RAI Blower s 22 thru 1 The standard URAI blower features universal detachable rugged steel mounting feet to permit easy in-field adaptation to either vertical or horizontal installation requirements and any of four drive shaft positions top, bottom, right or left hand. All frame sizes are center-timed to allow for rotation in either direction. Universal RAI DSL Blower s 32 thru 6 This URAI blower features Dual Splash Lubrication (DSL). There is splash lubrication at the gear end and the drive end. The drive end has two shaft-mounted slingers and the gear end features Roots exclusive figure-eight gearbox design that work together to improve oil distribution and to maixmize gear and bearing life. This unit also features sight glasses (3/ ) for accurate oil level confirmation. Universal RAI-J WHISPAIR Blower s 33J thru J Roots refined the standard URAI line using computer-aided design techniques to incorporate the Roots exclusive WHISPAIR jet. The WHISPAIR jet uses shock suppression techniques for noise and pulsation reduction. This exclusive WHISPAIR feature can reduce noise 3-5 db on typical installations. Like the standard URAI blower, the URAI-J features universal detachable rugged steel mounting feet to permit easy in-field adaptation to any of four positions. Universal RAI-G Gas Blower s 32GJ thru 6GJ URAI gas blowers feature mechanical seals and Viton o-rings. The seal system is designed to meet or exceed gas industry safety standards, including provisions for purge gas in the headplates. The URAI gas blower uses detachable rugged steel mounting feet for easy in-field adaptation of drive shaft position to meet vertical or horizontal installation requirements by exchanging the orientation of the mounting feet. Universal RAI-J DSL Blower s 33J thru J This URAI blower features the WHISPAIR design with the dual splash lubrication feature to offer the longest life and quietest performance. 2

3 3 Universal RAI Blower Performance Table PSI 6 PSI PSI PSI PSI PSI HGV Max. Vacuum PSI PSI Notes: 1. Pressure ratings based on inlet air at standard pressure of. psia, standard temperature of 6 F, and specific gravity of Vacuum ratings based on inlet air at standard temperature of 6 F, discharge of 30 Hg and specific gravity of 1.0.

4 4 Universal RAI-J Blower Performance Table Universal RAI DSL Blower Performance Table Notes: 1. Performance based on inlet air at standard pressure of. psia, standard temperature of 6 F, and specific gravity of Vacuum ratings based on inlet air at standard temperature of 6 F, discharge pressure of 30 Hg and specific gravity of PSI 6 PSI PSI PSI PSI PSI HGV Max. Vacuum PSI PSI HGV HGV HGV HGV HGV HGV PSI Max. Pressure HGV HGV

5 5 Universal RAI-G Blower Performance Table URAI-G Notes: 1. Performance based on METHANE at standard pressure of. psia, standard temperature of 6 F, and specific gravity of For vacuum service consult factory or nearest Roots sales office PSI PSI PSI PSI PSI PSI HGV Max. Vacuum PSI PSI

6 Universal RAI-J DSL Blower Performance Table 4 PSI 5 PSI 6 PSI PSI PSI 9 PSI PSI PSI VACUUM DATA INHGV 33J J J J J NOTES: 1. Performance based on inlet air at standard pressure of. psia, standard temperature of 6º F, and specific gravity of Vacuum ratings based on inlet air at standard temperature of 6º F, and specific gravity of 1.0. Universal RAI Series Blowers Dimensions Drive Shaft Location A B C D D1 D2 O O 1 P P 1 R U Keyway Inlet & Disch. Dia x NPT x NPT x NPT x NPT x.094 NPT x.094 NPT x.094 NPT x NPT x.5 NPT x NPT x NPT * x NPT * x NPT * x FLG ** x NPT ** x FLG ** x.1.0 FLG *1.00 in horizontal configuration **21.00 in horizontal configuration Approx. Net Wt. (lbs.) 6

7 RAM Series Rotary Positive Displacement Blowers Basic Equipment Description ROOTS RAM series units are recognized as the most volumetrically efficient equipment in the industry. Unless otherwise noted, RAM series equipment may operate under either vacuum or pressure application with no equipment modification, and can provide simultaneous vacuum and pressure for a system with a single unit. RAM series units feature integral-shaft ductile iron impellers with involute profiles. Headplates and the rigid casing are cast grey iron, while the drive end and gear covers are aluminum. Carburized ground alloy steel spur timing gears are securely mounted on taper end shafts. All units in the RAM series feature cylindrical roller bearings for maximum life. Detachable steel mounting feet permit in-field adaptability to either vertical or horizontal installation requirements. Piston-ring shaft seals reduce gas leakage through the headplates, while lip-type oil seals prevent lubricant from entering the air chamber. RAM units are splash lubricated on both sides with high volume oil reservoirs. RAM Blower s 404 thru 624 All standard units are center-timed to allow rotation in either direction. RAM -J WHISPAIR Blower s 404J thru 624J RAM-J units feature the exclusive WHISPAIR jets to control pressure equalization by feeding backflow in the direction of impeller movement, thereby aiding rotation. RAM -GJ Gas WHISPAIR Blower Available on all RAM s RAM standard gas blowers feature a piston ring system between the compression chamber and vent cavities. All vent cavities are plugged for purge or drain. Special long-life mechanical seals and Viton 0-rings are installed at each bearing to control gas and oil leakage. The seal incorporates a unique geometry that promotes enhanced cooling and extended seal life. RAM gas units are suitable for both vacuum or pressure service. Alternate material units and optional 0-ring material are available for gas units, please contact the factory for more information. RAM -VJ Water Sealed WHISPAIR Blower s 406J thru 624J RAM WHISPAIR units are available equipped with an inlet spray nozzle and seal water flow meter for water injection. This feature cools the vacuum unit to enable the unit to reach deeper vacuum while minimizing potential impeller and casing distortion.

8 RAM, RAM -J and RAM -GJ Blower Performance Table 4 PSI 6 PSI PSI PSI PSI PSI 1 PSI Max. Vacuum HGV RAM -VJ Water Sealed Blower Performance Table HGV HGV HGV 20 HGV 22 HGV 24 HGV Notes: 1. Pressure ratings based on inlet air at standard pressure of. psia, standard temperature of 6 F, and specific gravity of Vacuum ratings based on inlet air at standard temperature of 6 F, discharge of 30 Hg and specific gravity of 1.0.

9 C AF - INLET AF' - DISCHARGE P P ' LEFT DISCHARGE RIGHT DISCHARGE TOP DISCHARGE O R U D D1 O' B A BOTTOM DISCHARGE A' VERTICAL CONFIGURATION (Horizontal Air Flow) HORIZONTAL CONFIGURATION (Vertical Air Flow) RAM Blowers Dimensions Drive Shaft AF AF Approx. A A B C Location O O P P R U Keyway Inlet Discharge NetWt D D1 Diameter Diameter (lbs) x NPT 3.0 NPT x NPT 4.0 NPT x NPT 4.0 NPT x FLG 6.0 FLG x.1.0 FLG.0 FLG x FLG.0 FLG x FLG.0 FLG RAM -J & RAM -GJ Blowers Dimensions Drive Shaft AF AF Approx. A A B C Location O O P P R U Keyway Inlet Discharge NetWt D D1 Diameter Diameter (lbs) 404J x NPT 3.0 NPT J x NPT 4.0 NPT J x NPT 5.0 NPT J x FLG 5.0 FLG J x.1.0 FLG 6.0 FLG J x FLG 6.0 FLG J x FLG.0 FLG RAM VJ Blowers Dimensions Drive Shaft AF AF Approx. A A B C Location O O P P R U Keyway Inlet Discharge Net Wt D D1 Diameter Diameter (lbs) 406J x NPT 4.0 NPT J x NPT 5.0 NPT J x FLG 5.0 FLG J x.1.0 FLG 6.0 FLG J x FLG 6.0 FLG J x FLG.0 FLG

10 RCS Series Rotary Positive Displacement Blowers Basic Equipment Description ROOTS RCS series units are heavy-duty units with integral-shaft ductile iron impellers in an involute profile. The headplates, gear cover, drive end cover and rigid, one-piece casing are grey iron. Carburized and ground alloy steel spur timing gears are taper mounted on the shafts and secured with a locknut. Cylindrical roller bearings are used. Piston rings reduce air leakage through the headplate shaft openings, while lip-type oil seals prevent lubricant from entering the air chamber. All RCS series blowers are equipped with splash oil lubrication at both ends of the blower. Unless otherwise noted, RCS series units incorporate detachable rugged steel mounting feet to permit in-field adaptability to either vertical or horizontal installation. RCS Blower s 1 thru 2 All standard units are center-timed to allow rotation in either direction. RCS-J WHISPAIR Blower s J thru 32J RCS WHISPAIR units reduce noise and power loss by utilizing an exclusive wrap-around plenum and proprietary WHISPAIR jet portals to control pressure equalization. The WHISPAIR jets meter discharge pressure in the direction of impeller movement, thereby aiding rotation. Discharge pulsation is reduced by the pre-pressurization of the blower chamber. Reduced pulsation results in lower noise, and reduced shock loading on the impellers. RCS WHISPAIR units frames 1J thru 32J have feet integral to the headplates.

11 11 RCS Series Blower Performance Table PSI PSI PSI PSI PSI PSI HGV Max. Vacuum RCS-J Series Blower Performance Table PSI PSI PSI PSI PSI PSI HGV Max. Vacuum PSI

12 VERTICAL CONFIGURATION (Horizontal Air Flow) HORIZONTAL CONFIGURATION (Vertical Air Flow) RCS Blowers Dimensions Drive Shaft AF AF Approx. A A B C Location O O P P R U Keyway Inlet Discharge Net Wt D D1 Diameter Diameter (lbs) x.3.0 FLG.0 FLG x.3.0 FLG.0 FLG x.3 FLG FLG C AF - INLET AF' - DISCHARGE P P ' LEFT DISCHARGE RIGHT DISCHARGE TOP DISCHARGE O R U D D1 O' B A BOTTOM DISCHARGE A' VERTICAL CONFIGURATION (Horizontal Air Flow) HORIZONTAL CONFIGURATION (Vertical Air Flow) RCS-J Blowers Dimensions Drive Shaft AF AF Approx. A A B C Location O O P P R U Keyway Inlet Discharge Net Wt D D1 Diameter Diameter (lbs) J x.3.0 FLG.0 FLG J x.3.0 FLG.0 FLG J x.3.0 FLG.0 FLG J x.3.0 FLG.0 FLG J x.3.0 FLG.0 FLG J x.3 FLG.0 FLG

13 DVJ & DPJ Rotary Positive Displacement Blowers Basic Equipment Description ROOTS DVJ blowers feature an exclusive discharge jet plenum designed to allow cool, atmospheric air to flow into the casing. This unique design permits continuous operation at levels to blank-off with a single stage unit, without water injection or heat exchangers. In the case of ROOTS DPJ blowers, discharge air is cooled before injecting into discharge jet plenum. Headplates and the rigid casing are cast from grey iron, with aluminum drive end and gear covers. Carburized ground alloy steel spur timing gears are securely mounted on taper end shafts. These units are designed with detachable steel mounting feet to permit in-field adaptability to discharge left, right or vertically upwards DVJ WHISPAIR Blowers 2504 DVJ This unit features ball bearings, with splash lubrication at the gear end and grease lubrication at the drive end. Lip-type seals restrict oil leakage into the air stream. RAM DVJ Blower s 406 DVJ, 4 DVJ and 6DVJ RAM DVJ units feature integral-shaft ductile iron impellers with involute profiles. The top shaft is extended for drive side outlet blowers, and either shaft can be extended for drive on top or bottom outlet blowers. RAM DVJ units feature cylindrical roller bearings for maximum life. Piston ring shaft seals reduce gas leakage through the headplates, while lip-type oil seals prevent lubricant from entering the air chamber. The units are splash lubricated on both sides with high volume oil reservoirs.they can be equipped with mechanical seals for gas applications. Please contact the factory for more information on gas applications. 21 DVJ WHISPAIR Blowers 21 DVJ This unit has the same features as the RAM DVJ blowers. RAM 406 DPJ Dry High-Pressure Blower 406 DPJ In this unit, the ROOTS WHISPAIR jets control pressure equalization by feeding cooled discharge air in the direction of impeller movement, thereby aiding rotation. Cooled discharge air is mixed with incoming air to control temperature rise. This design permits continuous operation with discharge pressures up to 30 PSIG in a single stage unit. RAM DPJ units feature cylindrical roller bearings and is splash lubricated at both the gear and drive ends. Piston rings are used to reduce air leakage through the headplate shaft openings, while lip-type oil seals prevent lubricant from entering the air chamber. The top shaft is extended for drive side outlet blowers, and either shaft can be extended for drive on top outlet blowers. RAM DPJ units can be equipped with mechanical seals for gas application. Please contact the factory for more information on gas applications.

14 2504 DVJ Blower Performance Table HGV HGV 20 HGV Max. Free Air J RAM DVJ & 21 DVJ Blower Performance Table Max.Free Air HGV HGV HGV HGV HGV DPJ Blower Performance Table HGV HGV HGV HGV Notes:1. Vacuum ratings based on inlet air and jet air standard pressure and standard temperature of 6 F, discharge and jet pressures of 30 Hg and specific gravity of Refer to factory for performance guarantee above 24 HgV. 3. DPJ ratings based on inlet air at standard pressure of. psia, standard temperature of 6 F, and specific gravity of DVJ Blower Dimensions A B C D O O P P R R U Keyway AA AA AB AF AF AW WGT. 2504J x NPT NPT 2 NPT 5G 65 NOTES: 1. All dimensions are in inches. 2. Weights are in pounds, and are approximate. 3. Do not use for construction.

15 RAM DVJ Blower Dimensions 406J 4J 6J A A Drive Shaft B C Location O O D D P P R R x x x.250 U Keyway AA AA AB AF 4 NPT 6 FLG FLG AF AW 5 NPT 4 NPT 6 FLG 5 FLG FLG FLG Approx. Net Wt. (lbs) NOTES: 1. All dimensions are in inches. 2. Weights are in pounds, and are approximate. 3. Do not use for construction. 21 DVJ Blower Dimensions 21J A B C Drive Shaft Location O O D 4.00 D P.3 P.5 R 5.25 U.500 Keyway.1 x.094 AA 4.5 AA.63 AB 4.5 AF AF NPT NPT AW 2 NPT 5G Approx. Net Wt. (lbs) 65 NOTES: 1. All dimensions are in inches. 2. Weights are in pounds, and are approximate. 3. Do not use for construction. DPJ Blower Dimensions 406 DPJ A.00 A 1 B C D D 1.50 E 0 E F 4.5 G.3 M 6.95 N 3.4 O O R 9.00 S 4.50 P 1.5 V 2.5 Keyway.35x.1 AA.25 AA 1.50 AB DPJ AD 3.06 AE. AF AW.25 4 NPT 6.5 Weight 5 NOTES: 1. All dimensions are in inches. 2. Weights are in pounds, and are approximate.

16 Configurations ROOTS blowers and compressors are available in two basic configurations to meet nearly any piping arrangement or installation requirement. Orientation for inlet and discharge connections is determined from the drive end: Vertical Configuration: For vertical configuration, one impeller is mounted above the other, unless otherwise noted the blower drive end located opposite the timing gears. Inlet and discharge connection flanges are positioned to provide horizontal air/gas flow. Specify blower driver for either top or bottom connection. Horizontal Configuration: For horizontal configuration, impellers are located side-by-side. Unless otherwise noted, the blower drive end is located opposite the timing gears. Inlet and discharge connection flanges provide a vertical air/gas flow. Specify blower driver for either left or right hand blower shaft. LEFT: Vertical Configuration RIGHT: Horizontal Configuration Special Note: URAI-J models are designed to operate with only one shaft rotation direction to take full advantage of the WHISPAIR feature. Therefore, a URAI-J blower should be operated in the following combinations only: CCW Rotation: Bottom Shaft; Right side discharge or a Left Shaft; Bottom discharge. CCW Rotation: Top Shaft; Left side discharge or a Right Shaft; Top discharge. CW Rotation: Bottom Shaft; Left side discharge or a Right Shaft; Bottom discharge. CW Rotation: Top Shaft; Right side discharge or a Left Shaft; Top discharge. Typical Application Packages Pressure Application Gas Application High-Vacuum Application Exhauster Application S-SRBS rev Visit Contact Us page for your nearest location Houston, Texas Headquarters U.S. Toll Free Phone: 1--3-ROOT(S) (66) Direct Phone: Connersville, Indiana Operations U.S. Toll Free Phone: Direct Phone: United Kingdom Operations Phone: +44 (0) USA/Canada Sales Phone: Houston, Texas Factory Service Phone: Mexico City Sales and Factory Service Phone: Dubai Sales and Factory Service Phone: Malaysia Sales Phone: China Sales Phone: Shanghai Factory Service Phone: Dresser, Inc. all rights reserved. Printed in the U.S.A. All information subject to change without notice. ROOTS, Universal RAI-J, Universal RAI-G, RAM, and WHISPAIR are trademarks of Dresser, Inc. Universal RAI is a registered trademark of Dresser, Inc.