Click image to enlarge
| Item | Description |
|---|---|
| 1.1 | Seal face |
| 1.2 | O-ring |
| 1.3 | Spring |
| 2.1 | Seat |
| 2.2 | O-ring |
BT-RN
Features
- For plain shafts
- Single seal
- Unbalanced
- Conical spring rotating
- Dependent on direction of rotation
- Torque transmission via conical spring
Advantages
- Universal application opportunities
- Large choice of materials
- No shaft damage from set screws
- Dimensions can be adjusted and additional seats available
- Variants with shrink fitted face available
Operating range
Shaft diameter:
d1 = 6 … 110 mm (0.24" … 4.33"),
Pressure: p1* = 10(12) bar (145(174) PSI)
Temperature: t* = -20 °C … +140 °C (-4 °F … +284 °F)
Sliding velocity: vg = 15 m/s (50 ft/s)
* Dependent on medium, size and material
Materials
Seal face:
CrNi steel (F, F1), CrNiMo steel (G), Tungsten carbide (U), Silicon carbide (Q1)
Seat:
Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Tungsten carbide (U), Silicon carbide (Q1)
Elastomers:
NBR (P), EPDM (E), FKM (V), FFKM (K)
Metal parts:
CrNi steel 1.4301 (F), CrNiMo steel 1.4401 (G)
Standards and approvals
- Various material approvals e.g. WRAS, UBA, ACS, NSF, FDA available (depending on type and material combinations). Please inquire!
- EN 12756
Recommended applications
- Water and wastewater technology
- Building services industry
- Chemical industry
- Food and Beverage industry
- Low solid content media
- Centrifugal pumps
- Cooling water pumps
- Clean water pumps
Notes
Alternative seat ring can be supplied with short tail or long tail with slot for pin (to prevent seat rotation).
Product variants
BT-RN4
Same items and designations as for BT-RN, but with shrink-fitted seal face into the seal face carrier.
Seal face:
Tungsten carbide (U), Silicon carbide (Q1)
Shaft diameter:
d1 = 16 … 80 mm (0.63" … 3.15"),
Item Description
1.1 Seal face
1.2 O-ring
1.3 Spring
2.1 seat
2.2 O-Ring
Same items and designations as for BT-RN, but with installation length l1N according to EN 12756 (Normal, Unbalanced).
Item Description
1.1 Seal face
1.2 O-ring
1.3 Spring
A Spacer (upon request)
2.1 seat
2.2 O-Ring
BT-RN.KU
Items and designations same as for BT-RN, but with installation length l1K according to EN 12756 (Short, Unbalanced).
Item Description
1.1 Seal face
1.2 O-ring
1.3 Spring
2.1 Seat
2.2 O-Ring
PF L1
Item Description
2.1 Stationary seat
2.2 O-Ring
Click image to enlarge
PF L
Item Description
2.1 Stationary seat
2.2 O-Ring
Click image to enlarge
12 |
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| 14 |
| 16 |
| 18 |
| 20 |
| 22 |
| 24 |
| 25 |
| 28 |
| 30 |
| 32 |
| 33 |
| 35 |
| 38 |
| 40 |
| 43 |
| 45 |
| 48 |
| 50 |
| 53 |
| 55 |
| 58 |
| 60 |
| 63 |
| 65 |
| 68 |
| 70 |
| 75 |
| 80 |
| 85 |
| 90 |
| 95 |
| 100 |
Measurements in MM
d1 |
d3 |
d4 |
d6 |
d7 |
l1 |
l3 |
l4 |
l5 |
l6 |
|---|---|---|---|---|---|---|---|---|---|
| 8 | 16 | 20 | 13.0 | 17.1 | 20.5 | 15 | 5.5 | 1.2 | 3 |
| 10 | 20 | 23 | 14.0 | 18.1 | 20.5 | 15 | 5.5 | 1.2 | 3 |
| 11 | 20 | 26 | 16.5 | 20.6 | 23.5 | 18 | 5.5 | 1.2 | 3 |
| 12 | 22 | 26 | 16.5 | 20.6 | 23.5 | 18 | 5.5 | 1.2 | 3 |
| 13 | 22 | 28 | 19.0 | 23.1 | 28.0 | 22 | 6.0 | 1.2 | 3 |
| 14 | 24 | 28 | 19.0 | 23.1 | 28.0 | 22 | 6.0 | 1.2 | 3 |
| 15 | 24 | 32 | 21.0 | 26.9 | 29.0 | 22 | 7.0 | 1.5 | 4 |
| 16 | 26 | 32 | 21.0 | 26.9 | 30.0 | 23 | 7.0 | 1.5 | 4 |
| 17 | 26 | 32 | 21.0 | 26.9 | 30.0 | 23 | 7.0 | 1.5 | 4 |
| 18 | 32 | 36 | 25.0 | 30.9 | 32.0 | 24 | 8.0 | 1.5 | 4 |
| 19 | 32 | 36 | 25.0 | 30.9 | 33.0 | 25 | 8.0 | 1.5 | 4 |
| 20 | 32 | 36 | 25.0 | 30.9 | 33.0 | 25 | 8.0 | 1.5 | 4 |
| 21 | 32 | 38 | 30.0 | 35.4 | 33.0 | 25 | 8.0 | 2.0 | 4 |
| 22 | 36 | 41 | 30.0 | 35.4 | 33.0 | 25 | 8.0 | 2.0 | 4 |
| 23 | 36 | 41 | 30.0 | 35.4 | 35.0 | 27 | 8.0 | 2.0 | 4 |
| 24 | 38 | 41 | 30.0 | 35.4 | 35.0 | 27 | 8.0 | 2.0 | 4 |
| 25 | 39 | 43 | 33.0 | 38.2 | 35.5 | 27 | 8.5 | 2.0 | 4 |
| 26 | 39 | 43 | 33.0 | 38.2 | 35.5 | 27 | 8.5 | 2.0 | 4 |
| 28 | 42 | 50 | 38.0 | 43.3 | 38.0 | 29 | 9.0 | 2.0 | 4 |
| 29 | 42 | 50 | 38.0 | 43.3 | 38.0 | 29 | 9.0 | 2.0 | 4 |
| 30 | 44 | 50 | 38.0 | 43.3 | 39.0 | 30 | 9.0 | 2.0 | 4 |
| 32 | 46 | 50 | 38.0 | 43.3 | 39.0 | 30 | 9.0 | 2.0 | 4 |
| 33 | 47 | 57 | 45.0 | 53.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 34 | 48 | 57 | 45.0 | 53.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 35 | 49 | 57 | 45.0 | 53.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 36 | 50 | 57 | 45.0 | 53.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 37 | 52 | 57 | 45.0 | 53.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 38 | 54 | 64 | 52.0 | 60.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 40 | 56 | 64 | 52.0 | 60.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 42 | 59 | 64 | 52.0 | 60.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 43 | 59 | 64 | 52.0 | 60.5 | 50.5 | 39 | 11.5 | 2.0 | 6 |
| 44 | 60 | 69 | 57.0 | 65.5 | 52.5 | 41 | 11.5 | 2.0 | 6 |
| 45 | 61 | 69 | 57.0 | 65.5 | 52.5 | 41 | 11.5 | 2.0 | 6 |
| 48 | 64 | 69 | 57.0 | 65.5 | 52.5 | 41 | 11.5 | 2.0 | 6 |
| 50 | 66 | 76 | 64.0 | 72.5 | 56.5 | 45 | 11.5 | 2.0 | 6 |
| 55 | 71 | 80 | 64.0 | 72.5 | 58.5 | 47 | 11.5 | 2.0 | 6 |
| 60 | 80 | 85 | 72.0 | 79.3 | 60.5 | 49 | 11.5 | 2.0 | 6 |
| 65 | 85 | 90 | 77.0 | 84.5 | 62.5 | 51 | 11.5 | 2.0 | 6 |
| 70 | 90 | 97 | 82.0 | 89.5 | 62.5 | 51 | 11.5 | 2.0 | 6 |
| 75 | 99 | 103 | 87.0 | 94.5 | 68.5 | 57 | 11.5 | 2.0 | 6 |
| 80 | 104 | 110 | 92.0 | 99.5 | 70.5 | 59 | 11.5 | 2.0 | 6 |
| 85 | 109 | 116 | 98.0 | 105.5 | 72.5 | 59 | 13.5 | 2.5 | 6 |
| 90 | 114 | 121 | 105.0 | 111.5 | 75.5 | 62 | 13.5 | 2.5 | 6 |
| 95 | 119 | 126 | 110.0 | 116.5 | 75.5 | 62 | 13.5 | 2.5 | 6 |
| 100 | 124 | 131 | 114.0 | 119.5 | 88.5 | 75 | 13.5 | 2.5 | 6 |
| 110 | 143 | 149 | 124.0 | 132.2 | 92.5 | 75 | 17.5 | 4.0 | 7 |
BT-RN / BT-RN4 - Dimensions in millimeters