Click image to enlarge
| 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
Features
- Single seal
- For plain shafts
- Unbalanced
- Conical spring rotating
- Dependent on direction of rotation
- Torque transmission via conical spring
Advantages
- Universal application opportunities
- Reliable design
- High flexibility due to extended selection of materials
- No damage of the shaft by set screws
- Dimensions can be customized
- Alternative seats available
Operating range
Shaft diameter:
d1 = 10 … 100 mm (0.39" … 3.94")
Pressure: p1*= 12 (16) bar (174 (232) PSI)
Temperature:
t* = -35 °C … +200 °C (-31 °F … +392 °F)
Sliding velocity: vg = 15 m/s (50 ft/s)
* Dependent on medium, size and material
Materials
Seal face:
Al-oxide (V), Silicon carbide (Q1), 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:
CrNiMo steel 1.4401 (G)
Standards and approvals
- Various material approvals available, e.g. WRAS, UBA, ACS, NSF, FDA (depending on type and material combinations). Please enquire!
- EN 12756 (FH.NU, FH.KU)
Recommended applications
- Water and wastewater technology
- Chemical industry
- Building services 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.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
BT-FH.NU
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 Colalr
1.3 O-Ring
1.4 O-Ring
1.5 Spring
2.1 Stationary seat
2.2 O-Ring
BT-FHC
Items and designations are the same as for BT-FH, but with shorter installation length l3C (see dimension table). Same installation length as the BT-RN.
Item Description
1.1 Seal face
1.2 Colalr
1.3 O-Ring
1.4 O-Ring
1.5 Spring
2.1 Stationary seat
2.2 O-Ring
