Type：Elastomeric Bellow Mechanical Seal
Replacement：Burgmann BT-PN
Temperature：-20℃ to +120℃
Pressure：≤0.6Mpa
Speed：≤5m/s
Material：V,Q1,Q2,U2,U1,B,A,P,E,V,F,G
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.
Features
• Rubber bellows mechanical seals
• Unbalanced
• Single spring
• Independent of direction of rotation
Operating range
Shaft diameter: d1* = 8…40mm (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 = 10m/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), CrNiMosteel 1.4401 (G)
Certificates
• KTW / UBA
• W270
• ACS
• WRAS
• NSF
• FDA
• DM 174/04
Recommended applications
• Pool and spa applications
• Household appliances
• Water and waste water technology
• Food and beverage industry
• 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
Item Description
1 Seal face
2 Stationary seat
3 Bellows
3a Gasket
4 Spring
5 Ring
5a Drive ring
5b Collar
