Features
- Rubber bellows mechanical seals
- Unbalanced
- Single spring
- Independent of direction of rotation
Advantages
The BT-PN is a large series mechanical seal with a simple yet
effective design that is easy to assemble. The special spring arrangement allows
a short axial installation length. This advantage is combined with an increased
working pressure capability of up to 12 bar (174 PSI). The spring is free from
torque transmission.
Operating range
- Shaft diameter:
- d1* = 8 … 40 mm (0.31″ … 1.57″)
- Pressure: p1** = 12 bar (174 PSI),
- vacuum … 0.5 bar (7.45 PSI)
- Temperature:
- t** = -20 °C … +120 °C (-4 °F … +248 °F)
- Sliding velocity: vg = 10 m/s (33 ft/s)
- Operating limits depend on p・vg factor
* Other diameters upon request
** Dependent on medium, size and material
Materials
- Seal face:
- Carbon graphite antimony impregnated (A),
- Carbon graphite resin impregnated (B),
- Silicon carbide (Q1, Q6)
- Seat:
- Aluminium oxide (V), Steatite (X),
- Silicon carbide (Q1, Q6, Q7)
- Elastomers:
- NBR (P), FKM (V), EPDM (E)
- Metal parts: CrNi steel 1.4301 (F),
- CrNiMo steel 1.4401 (G)
| Item | Description |
| 1 | Seal face |
| 2 | Stationary seat |
| 3 | Bellows |
| 3a | Gasket |
| 4 | Spring |
| 5 | Ring |
| 5a | Drive ring |
| 5b | Collar |
Recommended applications
- Food and beverage industry
- Water and waste water technology
- Pool and spa applications
- Household appliances
- Submersible oil filled motors (4″ / 6″)
- Submersible pumps, back-to-back
- installation
- Peripheral pumps for industrial
- applications
- Domestic and garden pumps
- Coffee machines
- Shower pumps
