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| Item | Description |
|---|---|
| 1.1 | Seal face |
| 2.1 | Stationary seat |
| 1.2 | Collar |
| 1.3,1.4 | O-RING |
| 1.5 | Spring |
| 1.2 | Collar |
| 2.2 | O-Ring |
BT-FH.NB
Features
- Single seal
- For stepped shafts
- Balanced
- Conical spring rotating
- Dependent on direction of rotation
- Torque transmission via conical spring
- Version with shorter length available (KB)
Advantages
- Universal application opportunities
- Reliable design
- Economical balanced seal
- High flexibility due to extended selection of materials
- No damage of the shaft by set screws
Operating range
Shaft diameter:
d1 = 16 … 70 mm (0.63" … 2.76")
Pressure: p1* = 25 bar (363 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
Seal face:
Silicon carbide (Q1, Q6, Q7)
Seat:
Carbon graphite antimony impregnated (A),
Carbon graphite resin impregnated (B),
Carbon graphite, full carbon (B3),
Silicon carbide (Q1, Q6, Q7)
Elastomers:
NBR (P), EPDM (E), FKM (V), FFKM (K)
Metal parts:
CrNiMo steel (G)
Standards and approvals
- EN 12756
- Various material approvals e.g. WRAS, UBA, ACS, NSF, FDA available (depending on type and material combinations). Please inquire!
Recommended applications
- Water and wastewater technology
- Building services industry
- Chemical industry
- Food and Beverage industry
- Low solid content media
- Centrifugal pumps
- Multistage vertical pumps
- Cooling water pumps
- Hot 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-FH.KB
Items and designations same as for BT-FH.NB, but with installation length l1K according to EN 12756 (Short, Balanced).
Item description
1.1 Seal face
2.1 Stationary seat
1.2 Collar
1.3, 1.4 O-Ring
1.5 Spring
1.2 collar
2.2 O-Ring
BT-FH.NU
Items and designations are the same as for BT-FH, but with installation length l1N according to EN 12756 (Normal, Unbalanced).
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-FH.KU
Items and designations are the same as for BT-FH, but with installation length l1K according to EN 12756 (Short, Unbalanced).
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
