Features

Cartridge double seal for top entry drives
For glass-lined vessels
Liquid lubricated
Self-closing on product side
Unbalanced
Independent of direction of rotation
Multiple springs rotating

Advantages

Ready-to-fit and factory-tested unit
Available with or without bearing
Suitable for standardizations
Seal can be applied at higher pressure and rotating speed than specified by DIN
The seal can be lifted off the glass-lined flange as a complete cartridge. The sensitive glass lined basic flange remains mounted on the vessel.
ATEX certification on request

Operating range

Shaft diameter:
d1 = 40 ... 160 mm (1.57" ... 6.30")
Pressure:
p1 = vacuum ... 16 bar (232 PSI),
p3 = max. 18 bar (261 PSI)
Temperature:
t1 = -40 °C ... +200 (250*) °C
(-40 °F ... +392 (482*) °F)
Sliding velocity:
vg = 0 ... 5 m/s (0 ... 16 ft/s)

Materials

Seal faces: Carbon graphite or Silicon carbide, FDA conform
Seats: Silicon carbide, FDA conform
Secondary seals and metallic parts acc. to application and customers' requirement

Standards and approvals

FDA
ATEX
DIN 28138 (mechanical seals for agitator shafts)
DIN 28136 T3 (for glass-lined vessels)
DIN 28137 T2 (flange connection for glass-lined vessels)
DIN 28159 (shaft end for glass-lined vessels)

Recommended applications

Petrochemical industry
Chemical industry
Pharmaceutical industry
Food and beverage industry
Agitators
Reactors