Cartex
Dual seals

Cartex <br/>Dual seals For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Item Description
1 Seal face
2, 5, 7, 10, 13, 15 O-Ring
3 Spring
4 Seat
6 Shaft sleeve
8 Cover
9 Seal face
11 Spring
12 Seat
14 Drive collar
16 Set screw
17 Snap ring
18 Assembly fixture
19 Hex socket head screw
20 Gasket
21 Screw plug
22 Gasket
  • Dual seal
  • Cartridge
  • Balanced
  • Independent of direction of rotation
  • Double pressure balanced
  • Integrated pumping device
  • Variants available: for eccentric screw pumps (-Vario) and gas-lubricated version (-GSDN)
  • Ideal seal for standardizations
  • Universal applicable for packings conversions, retrofits or OEM
  • No dimensional modification of the seal chamber (centrifugal pumps) necessary, small radial installation height
  • No damage of the shaft by dynamically loaded O-Ring
  • Extended service life
  • No damage caused by dirt entered during assembly
  • Straightforward and easy installation due to pre-assembled unit
  • Individual adaptation to pump design possible
  • Customer specific versions available
Shaft diameter:
d1 = 25 ... 100 mm (1.000" ... 4.000"
Other sizes on request
Temperature:
t= -40 °C ... 220 °C (-40 °F ... 428 °F)
(Check O-Ring resistance)

Sliding face material combination BQ1
Pressure: p1 = 25 bar (363 PSI)
Sliding velocity: vg = 16 m/s (52 ft/s)

Sliding face material combination Q1Q1 or U2Q1
Pressure: p1 = 20 bar (290 PSI)
Sliding velocity: vg = 10 m/s (33 ft/s)

Barrier fluid circulation system:
p3max = 25 bar (363 PSI)
Δp (p3 - p1)ideal = 2 ... 3 bar (29 ... 44 PSI),
7 bar (102 PSI) for barrier media with poor lubricating properties.

Pump startup:
Δp (p3 - p1)max = 25 bar (363 PSI) allowed

Recommended supply medium:
max. ISO VG 5
Axial movement: ±1.0 mm, d1 ≥75 mm ±1.5 mm
Seal face: Silicon carbide (Q1), Carbon graphite resin impregnated (B), Tungsten carbide (U2)
Seat: Silicon carbide (Q1)
Secondary seals: FKM (V), EPDM (E), FFKM (K), Perfluorocarbon rubber/PTFE (U1)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), CrNiMo cast steel (G)
  • Petrochemical industry
  • Chemical industry
  • Pharmaceutical industry
  • Power plant technology
  • Pulp and paper industry
  • Mining industry
  • Food and beverage industry
  • Sugar industry
  • Universally applicable
  • Centrifugal pumps
  • Eccentric screw pumps
The EagleBurgmann QFT1000 buffer system and QFT2000 vessels are suitable for Cartex-DN in back-to-back arrangement. The EagleBurgmann TS1016 and TS2000 thermosiphon systems support double and back-to-back seal configurations.

Product links:
EagleBurgmann QFT1000
EagleBurgmann QFT2000
EagleBurgmann TS1000
EagleBurgmann TS2000