Rotary Seals - Dilanda.it

Radial Oil Seal
n Busak+Shamban type TRD and STEFA type BC (DIN 3761 type BS)
b
Medium
d2 H8
d1 h11
Figure 19
Installation drawing
General description
B+S type TRD and STEFA type BC are metal cased radial lip
seals. The additional dust lip protects the main sealing lip
against dust and other fine solid contaminants and
therefore this type is recommended for use in polluted
environments. To achieve a long lifetime a suitable
lubricant between the two sealing lips should be applied.
As the static sealing between housing and metallic shell is
somewhat limited, low viscosity media can “creep“. Better
performance can be achieved with epoxy based resin O.D.
coating. This special treatment is on request.
Advantages
- Effective protection against air side contaminants
- Good radial stiffness, especially for large diameters
- Good fitting stability avoiding pop-out of the seal
- Modern lip design provides low radial forces
- Cost effective for expensive elastomer materials
Application examples
- Transmission systems (e.g. gearboxes)
- Pumps
- Electrical motors
- Machinery industry (e.g. tool machines)
- Heavy engineering applications
Technical data
Pressure:
Temperature:
Speed:
Media:
up to 0.05 MPa
-40°C to +200°C
(depending on material)
up to 30 m/s
(depending on material)
mineral and synthetic lubricants
(CLP, HLP, APGL etc.)
B+S/STEFA have carried out several thousand compatibility
tests. Please ask for details.
Important Note:
The above data are maximum values and cannot
be used at the same time, e. g. the maximum
operating speed depends on material type,
pressure and temperature.
Latest information available at www.busakshamban.com
Edition April 2006
73