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 special design
According to the requirements and conditions for the custom processing

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