Features
• For unstepped shafts
• Single seal
• Balanced
• Independent of direction of rotation
• Encapsulated rotating spring
 

Advantages
• Especially designed for solids containing and highly
viscous media
• Springs are protected from the product
• Rugged and reliable design
• No damage of the shaft by dynamically loaded O-Ring
• Universal application
• Variant for operation under vacuum available
• Variant for sterile operation available
 

Operating range
Shaft diameter: d1 = 18 ... 100 mm (0.71" ... 4")
Pressure: p1* = 0.8 abs ... 25 bar (12 abs. ... 363 PSI)
Temperature: t = –50 °C ... +220 °C (–58 °F ... +430 °F)
Sliding velocity: vg = 20 m/s (66 ft/s)
Axial movement: ±0.5 mm
* An integral stationary seat lock is not needed within the
permissible low pressure range. For prolonged operation
under vacuum it is necessary to arrange for quenching on
the atmospheric side

Materials
Q1Q1VGG

Q12Q12VGG

U1U1VGG

U12U12VGG

Q1AVGG

Q1BVGG
 

Recommended applications

• Sugar industry
• Pulp and paper industry
• Water and waste water technology
• Dirty, abrasive and solids containing media
• Thick juice (70 ... 75 % sugar content)
• Raw sludge, sewage slurries
• Raw sludge pumps
• Thick juice pumps
• Conveying and bottling of dairy products