Elastomer bellows mechanical seals

Advantages

Mechanical seal for large-series cold water pumps, produced in millions of units per year. The BT-AR owes its success to the wide range of application, the short axial length (this allows for more economic pump construction and saves material), and the best quality/price ratio. The elasticity of the bellows design enables a more robust operation.

The BT-AR can also be used as a multiple seal in tandem or back-to-back arrangement when the product media cannot ensure lubrication, or when sealing media with a higher solids content. Installation proposals can be provided upon request.

Operating range

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)
Sliding velocity: vg = 10 m/s (33 ft/s)

* Dependent on medium, size and material

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)

Standards and approvals

• KTW

• W270

• ACS

• WRAS

• NSF

• DM 174/04

• FDA

Recommended applications

• Water and waste water technology

• Pool and spa applications

• Household appliances

• Domestic and garden pumps

• Whirlpool and swimming pool pumps

• Dishwasher pumps

• Submersible motors / pumps

• Water pumps / waste water pumps