Project Description

QQ – E

  • QQ - E
  • QQ - E
Item No.Description
1Seal face
5Seat
13Sleeve
16Housing
18Pin
37Assembly fixture
2, 12, 15, 22, 23, 24, 25O-Ring
43Plug
  • Seals can be operated with pressurized
    buffer fluid or with quench
  • 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 on both the faces
  • Dual seal can also be used as a single
    seal by removing the atmospheric seal
    parts
  • Pulp and paper industry
  • Chemical industry
  • Clean, abrasive or corrosive liquids
  • Stocks of various kind
  • Applications where crystallization is a problem
  • 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)
    (180 °C (356 °F) with FFKM elastomers)
  • Pressure: p1 … 25 bar (363 PSI), p3
  • Speed= 20 m/s(66ft/s)
  • Non-flow operation: Temperature: t = +5 °C … +100 °C
    (+41 °F … +212 °F)
  • Pressure: p1 max. 10 bar (145 PSI), p3 > p1
  • Sliding velocity: vg … 20m/s (66 ft/s)
  • Dual seal configuration
  • Balanced design
  • Independent of direction of rotation
  • Semi-Cartridge construction
  • Double pressure balanced design
  • Designed with provision for internal
    barrier fluid circulation
  • No dynamic O-Ring on the shaft
  • Robust construction with shrink-fitted
    seal faces
  • Seal faces have a large clearance to
    the shaft
  • Static springs on both the sides