Features
Stationary springs
Rotating seat
Double seal
Balanced
Cartridge unit
Standard version with V-grooves,
U-grooves optional (independent of direction of rotation)Gas-lubricated, gas-buffered
Does not open in the event of buffer pressure failure, self closing at pressure reversal
Advantages
Contact-free operation
No friction on the seal faces, no heat generated at the seal or in the medium
No additional complex components to dissipate frictional heat
Maximum environmental protection and maximum efficiency
Operating range
Shaft diameter:
d1 = 30 … 100 mm (1.18" ... 3.94")
Pressure:
p1 = 13 bar (189 PSI),
p3 = 16 bar (232 PSI)
with V-grooves (uni-directional)
p1 = 9 bar (131 PSI),
p3 = 12 bar (174 PSI)
with U-grooves (bi-directional)
Differential pressure
(p3 - p1) = min. 3 bar (44 PSI)
Operating temperature limits for:
EPDM -20 °C … +140 °C (-4 °F ... +284 °F)
FFKM -20 °C … +120 °C (-4 °F ... 248 °F)
FKM -20 °C … +170 °C (-4 °F ... 338 °F)
Sliding velocity: vg = 4 … 15 m/s (13 ... 49 ft/s)
Axial movement: ± 1.0 mm
Materials
Seal face: Silicon carbide (Q1/Q19)
Seat: Silicon carbide (Q19/Q1)
Secondary seals:
FKM (V), EPDM (E), FFKM (K)
Spring: Hastelloy® C-4 (M)
Metal parts:
CrNiMo steel (G), Hastelloy® C-4 (M)
Recommended applications
Chemical industry
Refining technology
Gases and liquids
Media which require high purity
Environmental harmful media
Pumps
Service
provide specialised design
provide processing service according to constomer's need
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