Project Description


  • VUY
  • VUY
Item No.Description
1Bellows unit
1.1Seal face
1.3Drive collar
1.4L-ring (spring collar)
4O-ring or L-ring
5Spacer ring
6Shaft sleeve
10Drive collar
11Set screw
12Snap ring
13Assembly fixture
14HSH Cap Screw
  • O-rings are dynamically loaded to prevent shaft damage
  • Easy and trouble-free installation
  • Due to large radial clearance the damage to the seal faces are avoided, in addition to the seal faces being protected by strong steel parts
  • Misalignment during installation and operations is reduced due to the static springs
  • Pulp and paper industry
  • Chemical industry
  • All clean none abrasive media
  • Ahlstar UP A MS21 range of pumps
  • Sulzer A, APP/APT pumps
  • Sulzer SL mixers
  • Metso conical refiners
  • Stock pumps
  • Seal face: Silicon carbide (Q12), Carbon (A)
  • Secondary seals: FKM (V), EPDM (E), FFKM (K)
  • Metal parts: CrNiMo steel (G),
  • Grade 5A (4T), SMO 654 (4U)
  • Temperature: t =-20 °C …+140 °C (-4°F …+284 °F)
  • Pressure: p1 … 25 bar (363 PSI)
  • Sliding velocity: vg … 20 m/s (66 ft/s)

Single seal configuration

Balanced designIndependent of direction of rotation

Semi-Cartridge construction

No dynamic O-Ring on the shaft