Features：
Single pusher-type seal
Unbalanced
Conical spring
Dependent on direction of rotation

Advantages
AS-R155 combines a spring loaded ceramic seal face and the traditional pusher mechanical seals. The competitive price and the wide range of applications have made the BT-FN seal a success. The seal is produced with punched metal parts that allow an economical design.

AS-R155 mechanical seals are also the ideal solution for light chemicals media applications. To ensure the best reliable performance, we recommend a material combination of hard material sliding faces and proper elastomer O-Rings.

Operating range：
Shaft diameter:
d1*= 10 … 40 mm (0.39" … 1.57")
Pressure: p1*= 12 (16) bar (174 (232) PSI)
Temperature:
t* = -35 °C… +180 °C (-31 °F … +356 °F)
Sliding velocity: vg = 15 m/s (49 ft/s)
* Dependent on medium, size and material

Materials：
Seal face:
Steatite (X), Aluminium oxide (V), Silicon carbide (Q1, Q6), Tungsten carbide (U1)
Seat:
Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Silicon carbide (Q1, Q6), Tungsten carbide (U1)
Elastomers:
NBR (P), EPDM (E), FKM (V), FFKM (K)
Metal parts: CrNi steel 1.4301 (F), CrNiMo steel 1.4401 (G)

Standards and approvals：
KTW
W270
ACS
WRAS
NSF
FDA
DM 174/04

Recommended applications：
Building services industry
Household appliances
Centrifugal pumps
Clean water pumps
Pumps for domestic applications and gardening