Roots™ Dresser Rotary Positive Displacement Blowers :: Roots® RCS® Positive Displacement Blowers
ROOTS™ RCS Rotary Positive Blowers
Frames 817, 824, 827
BASIC BLOWER DESCRIPTION- RCS rotary blowers are heavy-duty units designed with integral- shaft ductile iron impellers having an involute profile. The headplates, gear cover, end cover and rigid, one-piece casing are grey iron. Carburized and ground alloy steel spur timing gears are taper mounted on the shafts, secured with a locknut. Cylindrical roller bearings are used on the drive end with ball bearings on the gear end.
Piston rings reduce air leakage through the shaft openings in the headplates, and lip-type oil seals prevent lubricant from entering the air chamber. The RCS incorporates thrust control, with splash oil lubrication at both ends of the blower. All units are designed with detachable rugged steel mounting feet which permit in-field adaptability to either vertical or horizontal installation requirements.
The top shaft is extended for drive on side outlet blowers, and either shaft can be extended for drive on top or bottom outlet blowers. All frame sizes are center-timed to allow rotationin either direction. Two figure-eight lobe impellers mounted on parallel shafts rotate in opposite directions. As each impeller passes the blower inlet, it traps a definite 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 definite clearances. This allows operation without lubrication being required inside the air casing.
DESIGN AND CONSTRUCTION FEATURES
1. Center-timed for rotation in either direction
2. Alloy steel timing gears
3. Cylindrical roller bearings (Ball bearings on
drive end of 800 frame sizes)
4. Piston ring air seals
5. Lip-type oil seals
6. Splash oil lubrication
7. High volumetric efficiency
8. Horizontal and vertical configurations available
| ID | Roots Model # |
Blower Shaft Size (OD") | Blower Inlet/Outlet NPT or Flange | Busines Days to Ship. | Ship. Weight | Price | |
|---|---|---|---|---|---|---|---|
| 422 | Roots RCS 817 | 2.75" OD | 10" Flange | 10 | 1200 | $14364.00 |
|
| 423 | Roots RCS 824 | 2.75" OD | 12" Flange | 10 | 1330 | $15551.00 |
|
| 424 | Roots RCS 827 | 2.75" OD | 14" Flange | 10 | 1600 | $18186.00 |
|
| 8547 | Roots RCS 817 w/ Copper Tube Oil Cooler | 2.75" OD | 10" Flange | 10 | 1200 | $15162.00 |
|
| 8548 | Roots RCS 824 w/ Copper Tube Oil Cooler | 2.75" OD | 12" Flange | 10 | 1330 | $16349.00 |
|
| 8549 | Roots RCS 827 w/ Copper Tube Oil Cooler | 2.75" OD | 14" Flange | 10 | 1600 | $18974.00 |
|
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Positive Displacement Blowers - Roots® RCS® Dimensional Data
Positive Displacement Blowers - Roots® RCS® Pressure Performance Table
Positive Displacement Blowers - Roots® RCS® Vacuum Performance Chart
| Frame Size | A | A` | B | C | D | D1 | O | O` | P | P` | R | U` | KETWAY | AF Inlet Diameter | AF’ Discharge Diameter | AX | Approx. NetWt (lbs) |
| 817 | 19.00 | 27.00 | 24.00 | 38.00 | 18.00 | 10.00 | 28.00 | 20.00 | 19.00 | 25.00 | 14.00 | 2.00 | .625 x.313 | 10.0 FLG | 10.0 FLG | 4.00 | 1200.00 |
| 824 | 19.00 | 27.00 | 30.00 | 44.00 | 18.00 | 10.00 | 28.00 | 20.00 | 19.00 | 25.00 | 14.00 | 2.00 | .625 x.313 | 12.0 FLG | 12.0 FLG | 4.00 | 1330.00 |
| 827 | 19.00 | 27.00 | 34.00 | 48.00 | 18.00 | 10.00 | 28.00 | 20.00 | 19.00 | 25.00 | 14.00 | 2.00 | .625 x.313 | 14.0 FLG | 14.0 FLG | 4.00 | 1600.00 |
Positive Displacement Blowers - Roots® RCS® Pressure Performance Table
| Frame Size | Speed RPM | 4 PSI CFM | 4 PSI BHP | 6 PSI CFM | 6 PSI BHP | 8 PSI CFM | 8 PSI BHP | 10 PSI CFM | 10 PSI BHP | 12 PSI CFM | 12 PSI BHP | 15 PSI CFM | 15 PSI BHP |
| 817 | 880.00 | 982.00 | 24.00 | 895.00 | 36.00 | 821.00 | 48.00 | 756.00 | 60.00 | ||||
| 817 | 1770.00 | 2368.00 | 55.00 | 2281.00 | 79.00 | 2207.00 | 103.00 | 2142.00 | 127.00 | 2083.00 | 151.00 | 2003.00 | 187.00 |
| 817 | 2250.00 | 3116.00 | 78.00 | 3028.00 | 109.00 | 2955.00 | 139.00 | 2890.00 | 170.00 | 2831.00 | 200.00 | 2751.00 | 246.00 |
| 824 | 880.00 | 1326.00 | 33.00 | 1207.00 | 49.00 | 1108.00 | 65.00 | 1020.00 | 81.00 | ||||
| 824 | 1770.00 | 3198.00 | 74.00 | 3080.00 | 107.00 | 2980.00 | 139.00 | 2892.00 | 172.00 | 2813.00 | 204.00 | 2705.00 | 253.00 |
| 824 | 2250.00 | 4208.00 | 105.00 | 4090.00 | 147.00 | 3990.00 | 188.00 | 3902.00 | 229.00 | 3823.00 | 271.00 | 3715.00 | 333.00 |
| 827 | 880.00 | 1519.00 | 37.00 | 1383.00 | 56.00 | 1269.00 | 74.00 | 1169.00 | 93.00 | ||||
| 827 | 1770.00 | 3665.00 | 85.00 | 3529.00 | 122.00 | 3415.00 | 159.00 | 3314.00 | 197.00 | 3223.00 | 234.00 | ||
| 827 | 2250.00 | 4822.00 | 120.00 | 4687.00 | 168.00 | 4572.00 | 215.00 | 4472.00 | 262.00 | 4381.00 | 310.00 |
Positive Displacement Blowers - Roots® RCS® Vacuum Performance Chart
| Frame Size | Speed RPM | MAX VACUUM HG " | MAX VACUUM CFM | MAX VACUUM BHP |
| 817 | 880.00 | 12.00 | 761.00 | 35.00 |
| 817 | 1770.00 | 16.00 | 1959.00 | 101.00 |
| 817 | 2250.00 | 16.00 | 2707.00 | 137.00 |
| 824 | 880.00 | 12.00 | 1028.00 | 48.00 |
| 824 | 1770.00 | 16.00 | 2646.00 | 136.00 |
| 824 | 2250.00 | 16.00 | 3656.00 | 184.00 |
| 827 | 880.00 | 12.00 | 1178.00 | 55.00 |
| 827 | 1770.00 | 16.00 | 3032.00 | 157.00 |
| 827 | 2250.00 | 16.00 | 4189.00 | 212.00 |
