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Differentially Pumped Rotary Seals, RNN™ Series
Description
RNN Series Differentially Pumped Rotary Seal
Differentially pumped rotary seals (RNNs) provide 360° of continuous rotary freedom through the vacuum wall of a UHV system. The RNN has two stages of differential pumping isolated by graphite-impregnated, expanded, Teflon® seals on special sealing surfaces. A preloaded ball bearing set accurately controls the rotating stage position. This allows the unit to be successfully used with manipulators and other precision positioning devices.
RNNs are available with worm drive fine adjust option. This allows for easier and more accurate angle adjustment. RNNs are also available with anti-backlash stepping or synchronous motor drive.
RNNs with up to 12" I.D. are listed. Larger I.D.s have been built with excellent performance. Please Contact for special applications.
Specifications
- Models with clear inside diameters of 1.53" to 10" standard (see table). Larger sizes on request. All units are bakeable to 150°C
- Stationary and rotation flanges, tapped
- Flange face-to-flange face distance approximately that of two ConFlat-type flanges of the corresponding size
- 2 stage differentially pumped
- Base pressures in 10-11 Torr range
- 0-360° scale with Vernier, standard
Typical Performance Specifications
for RNN-400 and larger models
- resolution <0.004°
- repeatability <0.008°
- backlash <0.035°
Readability Specifications
- Standard scale: 1.0°
- Mechanical counter: 0.1°
- Microstepped motor drive required for maximum resolution
Options
- Fine adjust worm drive
- Digital read-out on fine adjust
- 0.1° read-out, mechanical, nonresetable
- Anti-backlash stepping motor drive 0.018° per full step (0.0225°/full step on RNN-150/MS)
- With manual knob
- Custom pumpout tube lengths and crank shaft lengths on /FA units available
Payloads
The standard maximum payloads are indicated to the right. Larger loads may be handled under specific applications. Please consult the factory for custom applications.
- The center of gravity of the payload is within "X" of the polar axis of the unit, where X is equal to 10% of the RNN I.D.
- The center of gravity of the payload is within "Y" distance of the rotating flange on the horizontal mounted units, where Y is the flange I.D.
- The overall maximum size "A" of the payload outside vacuum is:
Vertical operation: 7 x flange O.D.
Horizontal operation: 5 x flange O.D.
Inverted operation: 7 x flange O.D.
| Model No. |
Vertical |
Horizontal |
Inverted |
| RNN-150 |
54 lbs.
| 30 lbs. |
45 lbs.
|
| RNN-250
| 90 lbs.
| 38 lbs. |
70 lbs.
|
| RNN-400
| 144 lbs.
| 66 lbs. |
110 lbs.
|
| RNN-600
| 180 lbs.
| 84 lbs. |
140 lbs.
|
| RNN-800
| 200 lbs.
| 91 lbs. |
160 lbs.
|
| RNN-1000
| 370 lbs.
| 160 lbs. |
280 lbs.
|
| RNN-1200
| 430 lbs.
| 200 lbs. |
350 lbs.
|
Ordering Information
RNN (See Table 1)
RNN-400/FA to RNN-1000/FA (See Table 2)
RNN/MS Stepping or /MY Synchronous Motor Drive (See Table 3)
Table 1. RNN-Differentially Pumped Rotary Seals
(includes a removeable adjustment wrench)
| I.D. |
Flange
O.D. |
A |
B |
C |
D |
E |
F |
G |
H |
Model
No. |
Price |
| 1.53 |
2.75 |
4.50 |
2.99 |
1.0 |
3.18 |
2.75 |
.49 |
.13 |
60° |
RNN-150 |
Contact |
| 1.53 |
2.75/6* |
6.00 |
2.99 |
1.34 |
3.33 |
2.75 |
.15 |
.13 |
45° |
RNN-150/6 |
Contact |
| 2.53 |
4.5 |
5.75 |
3.64 |
1.36 |
3.58 |
4.50 |
.49 |
.03 |
45° |
RNN-250 |
Contact |
| 2.53 |
4.5/6* |
6.00 |
3.64 |
1.52 |
3.71 |
4.50 |
.33 |
.03 |
45° |
RNN-250/6 |
Contact |
| 4.03 |
6 |
7.75 |
4.57 |
1.68 |
4.34 |
6.02 |
.37 |
.06 |
45° |
RNN-400 |
Contact |
| 6.03 |
8 |
10.25 |
6.16 |
1.74 |
5.70 |
8.00 |
.42 |
.13 |
54° |
RNN-600 |
Contact |
| 8.00 |
10 |
12.05 |
7.03 |
1.94 |
6.70 |
10.00 |
.42 |
.13 |
45° |
RNN-800 |
Contact |
| 10.00 |
13.25 |
15.75 |
8.81 |
2.37 |
8.50 |
13.28 |
.29 |
.13 |
24° |
RNN-1000 |
Contact |
| 12.00 |
14 |
20.00 |
- |
3.34 |
- |
- |
- |
- |
- |
RNN-1200 |
Contact |
Dimensions in inches.
* Signifies rotating/mounting flange sizes respectively
Table 2. RNN/FA-Differentially Pumped Rotary Seals with Fine Adjust**
| I.D. |
Flange
O.D. |
A |
B |
C |
D |
E |
F |
G |
H |
I |
Drive
Ratio |
Model
No. |
Price |
| 1.53 |
2.75 |
5.13 |
3.38 |
1.00 |
4.95 |
2.75 |
.49 |
0.37 |
60° |
3 |
80:1 |
RNN-150/FA |
Contact |
| 1.53 |
2.75/6* |
6.00 |
3.84 |
1.34 |
5.32 |
2.75 |
.15 |
0.37 |
45° |
3 |
100:1 |
RNN-150/6/FA |
Contact |
| 2.53 |
4.5 |
6.38 |
4.20 |
1.36 |
6.11 |
4.50 |
.49 |
0.41 |
45° |
3 |
100:1 |
RNN-250/FA |
Contact |
| 2.53 |
4.5/6* |
6.38 |
4.20 |
1.52 |
6.11 |
4.50 |
.33 |
0.41 |
45° |
3 |
100:1 |
RNN-250/6/FA |
Contact |
| 4.03 |
6 |
8.50 |
8.25 |
1.68 |
9.28 |
6.02 |
.37 |
0.54 |
45° |
4 |
100:1 |
RNN-400/FA |
Contact |
| 6.03 |
8 |
10.25 |
8.50 |
1.74 |
9.93 |
8.00 |
.42 |
1.10 |
54° |
5 |
100:1 |
RNN-600/FA |
Contact |
| 8.00 |
10 |
12.75 |
9.56 |
1.94 |
11.50 |
10.00 |
.42 |
1.10 |
45° |
5 |
100:1 |
RNN-800/FA |
Contact |
| 10.00 |
13.25 |
17.00 |
11.86 |
2.37 |
17.25 |
13.28 |
.29 |
.91 |
24° |
7 |
100:1 |
RNN-1000/FA |
Contact |
| 12.00 |
14 |
Contact |
RNN-1200/FA |
Contact |
Dimensions in inches.
* Signifies rotating/mounting flange sizes respectively
** The fine adjust units utilize worm drive and are dynamic anti-backlash on RNN-400 and larger models. They come with large knobs and crank handles.
Table 3. RNN/MS or /MY-Differentially Pumped Rotary Seals with Anti-Backlash /MS Stepping or /MY Synchronous Motor Drive***
| I.D. |
Flange
O.D. |
A |
B |
C |
D |
E |
F |
G |
H |
I |
Drive
Ratio |
Model
No. |
Price |
| 1.53 |
2.75 |
5.13 |
10.00 |
1.00 |
9.97 |
2.75 |
.49 |
0.74 |
60° |
3.39 |
80:1 |
RNN-150/MS or /MY |
Contact |
| 1.53 |
2.75/6* |
5.13 |
10.00 |
1.34 |
9.97 |
2.75 |
.15 |
0.74 |
45° |
3.39 |
100:1 |
RNN-150/6/MS or /MY |
Contact |
| 2.53 |
4.5 |
6.38 |
10.10 |
1.36 |
8.30 |
4.50 |
.49 |
0.41 |
45° |
3.39 |
100:1 |
RNN-250/MS or /MY |
Contact |
| 2.53 |
4.5/6* |
6.38 |
10.10 |
1.52 |
8.30 |
4.50 |
.33 |
0.41 |
45° |
3.39 |
100:1 |
RNN-250/6/MS or /MY |
Contact |
| 4.03 |
6 |
8.50 |
9.77 |
1.68 |
11.69 |
6.02 |
.37 |
0.54 |
45° |
3.39 |
100:1 |
RNN-400/MS or /MY |
Contact |
| 6.03 |
8 |
10.20 |
10.13 |
1.74 |
11.69 |
8.00 |
.42 |
1.10 |
54° |
3.39 |
100:1 |
RNN-600/MS or /MY |
Contact |
| 8.00 |
10 |
12.75 |
11.39 |
1.94 |
11.69 |
10.00 |
.42 |
1.10 |
45° |
3.39 |
100:1 |
RNN-800/MS or /MY |
Contact |
| 10.00 |
13.25 |
Contact |
RNN-1000/MS or /MY |
Contact |
| 12.00 |
14 |
Contact |
RNN-1200/MS or /MY |
Contact |
| 18.00 |
24 |
Contact |
RNN-1800/MS |
Contact |
| 24.00 |
34 |
Contact |
RNN-2400/MS |
Contact |
Dimensions in inches.
*** The motor drive units utilize worm drive and are
all dynamic anti-backlash with hand knobs at the rear of the motor.
Options
| Mechanical Counter |
Model Number: /MC |
Price: Contact |
- Add digital read-out to fine adjust or motor drive unit
- 0.1° read-out, mechanical, non-resetable
- Viewable from the side
- Solution to difficulty caused by equipment mounted to platform obstructing view of degree scale
When /MC option is selected the Vernier scale in not included.
|
| Valve Manifold System |
Model Number: /MFD |
Price: Contact |
- Allows first stage pump to evacuate second stage pump
- Includes:
- Two 1.33" O.D. flange nipples, modified
- BVV-025 bakeable valve
- Flexible metal plumbing
- Assembled on RNN platform
|
| Thermocouple Access Tubes |
Model Number: /TC |
Price: Contact |
- Allows access to measure vacuum levels at each
differentially pumped zone
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| 2 l/s Appendage Ion Pump Assembly |
Model Number: /AIP-2/133/MP-2 |
Price: Contact |
|
Use with Valve Manifold System. Allows continuous pumping of RNN. Includes Alnico magnets. Requires Ion Pump Control Unit (below).
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