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| Item | Description |
|---|---|
| 1.1 | Seal face |
| 1.2 | Collar |
| 1.3 | O-Ring |
| 1.4 | O-Ring |
| 1.5 | Spring |
| 2.1 | Stationary seat |
| 2.2 | O-Ring |
BT-FN
Features
- Single seal
- For plain shafts
- Unbalanced
- Conical spring rotating
- Dependent on direction of rotation
- Torque transmission via conical spring
Advantages
- Economical seal solution
- Universal application opportunities
- Designed for high volume seal applications
- High flexibility due to extended selection of materials
- No damage of the shaft by clamping screws
- Dimensions can be customized
- Additional seats available
Operating range
Shaft diameter:
d1= 10 … 40 mm (0.39" … 1.57")
Pressure: p1*= 12 (16) bar (174 (232) PSI)
Temperature:
t* = -35 °C… +180 °C (-31 °F … +356 °F)
Sliding velocity: vg = 15 m/s (50 ft/s)
* Dependent on medium, size and material
Materials
Materials Seal face:
Al-Oxide (V, V1), Silicon carbide (Q1, Q6, Q7), Tungsten carbide (U)
Seat:
Carbon graphite antimony impregnated (A),
Carbon graphite resin impregnated (B),
Carbon graphite, full carbon (B3),
Silicon carbide (Q1, Q6, Q7),
Tungsten carbide (U)
PTFE glass fiber reinforced (Y1), PTFE carbon reinforced (Y2)
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 (FN.NU, FN.KU)
Recommended applications
- Water and wastewater technology
- Building services industry
- Chemical industry
- Food and beverage industry
- Low solid content media
- Centrifugal pumps
- Cooling water pumps
- Pumps for domestic applications
Notes
Alternative seat ring can be supplied with short tail or long tail with slot for pin (to prevent seat rotation).
Product variants
BT-FN.NU
Items and designations same as for BT-FN, but with installation length l1N according to EN 12756 (Normal, Unbalanced).
Item Description
1.1 Seal face
1.2 Collar
1.3, 1.4 O-Ring
1.5 Spring
2.1 Stationary Seat
2.2 O-Ring
BT-FN.KU
Items and designations same as for BT-FN, but with installation length l1K according to EN 12756 (Short, Unbalanced).
Item Description
1.1 Seal face
1.2 Collar
1.3, 1.4 O-Ring
1.5 Spring
2.1 Stationary Seat
2.2 O-Ring
