BT-PN

BT-PN For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Item Description
1 Seal face
2 Stationary seat
3 Bellows
3a Gasket
4 Spring
5 Ring
5a Drive ring
5b Collar
  • Rubber bellows mechanical seals
  • Unbalanced
  • Single spring
  • Independent of direction of rotation
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.
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
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)
  • KTW
  • W270
  • ACS
  • WRAS
  • NSF
  • FDA
  • DM 174/04
  • 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