Item Description
1, 5 Seal face
2, 12, 22, 23, 24 O-Ring
3 Spring
13 Sleeve
16 Housing
18 Pin
37 Locking fixture

LP-S-UP Single seal
Ready-fitted for Ahlstar UP A MS21 range of pumps, bearing unit A1-A6

LP-S

Features

  • Integrated seal for Sulzer A pumps
  • Single + Plan 11 flush
  • Semi cartridge unit
  • Balanced
  • Independent of direction of rotation
  • Static springs
  • No dynamic O-Ring on shaft
  • Rugged design
  • Shrink-fitted seal faces
  • Seal faces have a large clearance to the shaft
  • Wear part cost minimized

Advantages

  • Individually integrated to equipment for best sealing result
  • Straightforward and easy installation
  • Static springs reduces influence of misalignment
  • No damage of the shaft by dynamically loaded O-Ring
  • Extended service life due to rugged design
  • No brittle parts in contact with torque transmission pins
  • Seal faces protected by strong steel parts and a large radial clearance
  • The double, quench and single seals have the same wear parts on product side
  • Reduces stock holding costs

Operating range

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)
Stock content: ... 4 %

Materials

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)



Product variants

LP-S-UPF
Single seals for API Plan 11 with throttle acc. Sulzer design request, adapted for Sulzer A pump series.

LP-G-UP
Single seal for operation with unpressurised grease quench. Identically equal design to LP-S-UP however with quench housing at atmospheric side.

LP-S-S32-E10
Single seal adapted for Sulzer APP/APT Pumps.

LP-S-S32-F10
Single seal adapted for Sulzer APP/APT Pumps, for API Plan 11 with throttle acc. Sulzer design request.

LP-Q-S32-E20
Single seal for operation with unpressurised quench. Identical design with LP-S however with outboard lip seal at atmospheric side (installation length longer), adapted for Sulzer APP/APT Pumps.

LP-G-S32-E30
Single seal for operation with unpressurised grease quench. Identically equal design to LP-S-S32 however with quench housing at atmospheric side.

LP-S-SL
Single seal, adapted for Sulzer SL Mixers.

Further designs
available to fit in numerous other equipment from notable manufacturers for the Pulp- and Paper Industry e.g., Metso conical refiners, Andritz pressure screens and stock pumps.