Close Type Rubber Bellow Seals BT-AR

The close type rubber bellow seals BT-AR mechanical seal is a widely adopted solution for large-series cold water pumps, benefiting from its versatility across applications and compact axial design that enhances pump efficiency. Its elastic bellows design ensures robust operation, while offering an excellent quality-to-price ratio. The BT-AR can also be configured in tandem or back-to-back arrangements to handle media with inadequate lubrication or high solid content, with customized installation solutions available upon request.

Materials
Seal face:
Carbon graphite antimony impregnated (A), Carbon graphite resin impregnated (B), Carbon graphite, full carbon (B3), Silicon carbide (Q1, Q6), Tungsten carbide (U), PTFE glass fiber reinforced (Y)
Seat:
Steatite (X), Aluminium oxide (V, V1), Silicon carbide (Q1, Q6, Q7), Tungsten carbide (U), Cr steel (E), CrNi steel (F), CrNiMo steel (G)
Elastomers:
NBR (P), EPDM (E), FKM (V), HNBR (X4)
Metal parts:
CrNi steel 1.4301 (F), CrNiMo steel 1.4401 (G), CrNi steel 1.4057 (F1)

Application
Water and waste water technology
Pool and spa applications
Household appliances
garden pumps
swimming pool pumps
Dishwasher pumps
Submersible motors and pumps
Water pumps and waste water pumps

Shaft diameter
d1 = 6 … 70 mm (0.24" … 2.76")

Pressure:  p1* = 6 bar (87 PSI), vacuum … 0.5 bar (7.45 PSI) up to 1 bar (14.5 PSI) with seat locking

Temperature:
t* = -20 °C … +120 °C (-4 °F … +248 °F)