All Universal RAI (URAI) series blowers are heavy duty rotary blowers in a compact, sturdy design engineered for continuous duty and maximum reliability. These blowers have a time tested lubrication system. Howden Roots exclusive "figure-8" gearbox design improves oil distribution to the timing gears and lengthens bearing life.
The standard URAI blower features convenient grease lubrication on the drive end. The feet permit easy in-field adaptation to either vertical or horizontal installation requirements and any of four drive shaft positions.
Frame Sizes 22 thru 718
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 Howden Roots exclusive "figure-8" gearbox design that work together to improve oil distribution and to maximize gear and bearing life.
Frame Sizes 32 thru 615
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 steel mounting feet for adaptation of drive shaft position to meet vertical or horizontal installation requirements.
Frame Sizes 32GJ thru 615GJ
Howden 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 Installation. Like the standard URAI blower, the URAI-J features universal detachable steel mounting feet to permit easy in-field adaptation to any of four positions and grease lubrication on the drive end.
Frame Sizes 33J thru 56J
This URAI-J DLS blower combines the WHISPAIR design with the dual splash lubrication feature to offer the longest life and quietest performance of the URAI series.
Frame Sizes 33J thru 56J
Roots RAM series blowers are recognized by many as the most volumetrically efficient blowers 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.
Roots RAM blowers are center-timed to allow rotation in either direction and the ability to operate under vacuum or pressure application.
Frame Sizes 404 thru 624
RAM-J blowers feature the original WHISPAIR™ jets to control pressure equalization by feeding backflow in the direction of impeller movement. The WHISPAIR™ feature results in uni-directional flow and drive shaft rotation.
Frame Sizes 404J thru 624J
RAM Standard blowers feature a piston ring system between the compression chamber and vent cavities. This model's vent cavities are plugged for purge or drain. Special long-life mechanical seals with Viton™ O-rings are installed at each bearing to control gas and oil leakage. The seal incorporates a proprietary geometry that promotes enhanced cooling and extended life.
Available on all RAM Frame Sizes
These blowers are equipped with an inlet spray nozzle and seal water flow meter for water injection. This feature cools the unit enabling deeper vacuum levels than possible with conventional rotary vacuum blowers.
Frame Sizes 406J thru 624J
Roots RCS series blowers 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. Cylindrical roller bearings combined with high volume oil reserves offer low maintenance and trouble free operation.
All standard RCS blowers are center timed to allow rotation in either direction. RCS series blowers incorporate detachable steel mounting feet to permit adaptability to either vertical or horizontal installation.
Frame Sizes 817 thru 827
RCS WHISPAIR™ blowers reduce noise and power loss by utilizing a wrap-around plenum and proprietary WHISPAIR™ jet ports 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. This reduced pulsation results in lower noise, and reduced shock loading on the system components.
Frame Sizes 715J thru 832J
Fraserwoods is the recognized repair facility for Roots DVJ blowers to the truck mount/mobile equipment market. Roots DVJ and DPJ blowers feature an integral discharge jet plenum design, allowing cool, atmospheric air to flow into the casing. This unique design permits continuous operation at high vacuum levels (up to blank-off) with a single stage blower. With Roots DPJ blowers, high pressure discharge air is cooled before injection into the jet plenum.
The 2504 DVJ WHISPAIR Vacuum Blower features all bearings, lip seals, splash lubrication at the gear end and grease lubrication at the drive end.
Frame Size 2504 DVJ
The Roots 721 DVJ WHISPAIR vacuum blower has the same durable features as the RAM DVJ blowers however, it is not configured for gas applications.
Frame Size 721 DVJ
The 827 DVJ "The Beast" WHISPAIR exhauster is a heavy-duty design that is suited for V-belt or direct drive applications with integral-shaft ductile iron impellers. The 827 DVJ's integral cooling design eliminates the problems associated with high temperatures at vacuum levels beyond 16" Hg.
Frame Size 827 DVJ
In this unit, the 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 blowers can be equipped with mechanical seals for gas application.
Frame Size 406 DPJ
The TRI-NADO 1125 DVJ Truck-Mount, Tri-Lobe Vacuum Blower has been resigned to incorporate the latest technology for reduced noise and vibration.
Frame Size 1125 DVJ
RAM DVJ blowers feature integral-shaft ductile iron impellers with involute profiles. The top shaft is extended for side outlet blowers, and either left or right shaft can be extended for top or bottom outlet blowers. RAM DVJ blowers are splash lubricated on both sides with high volume oil reservoirs. They can be equipped with mechanical seals for gas applications.
Frame Sizes - 406 DVJ, 412 DVJ and 616 DVJ
Fraserwoods remanufactured Howden Roots PD blowers meet factory specifications and tolerances. From teardown inspection and dimensional verification, to machining and reassembly, our dedicated team return Roots blowers to "as new" condition. All rebuilds are completed in-house.
Our inventory of overhauled Roots blowers include the most popular models for the hydrovac and vacuum truck industry, as well as stationary industrial applications.
The Fraserwoods Advantage
The Roots 1021 DVJ WHISPAIR Dry Vacuum Exhauster design permits continuous operation at vacuum levels to blank-off.
The Roots 824 RCS Rotary Lobe Blower is a heavy duty unit that is center-timed for rotation in either direction.
The 624 RAM Rotary PD Blower incorporates thrust control, with splash oil lubrication at both ends of the blower.
The 721 DVJ WHISPAIR utilizes an integral cooling design that eliminates problems with high temperatures at vacuum levels beyond 16" Hg.
The TRI-NADO 1125 DVJ Truck-Mount, Tri-Lobe Vacuum Blower incorporates the latest technology for reduced noise and vibration.