Cartex Dual seals
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Cartex
Dual seals

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Cartex Dual seals
Cartex Dual seals
Request product
Technical drawing of Cartex Dual seals

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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

Cartex
Dual seals

PDF data sheet

Features

  • 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)

Advantages

  • 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

Operating range

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

Materials

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)

Standards and approvals

  • Compliant to TA Luft (German Clean Air Act)

Recommended applications

  • Petrochemical industry
  • Chemical industry
  • Pharmaceutical industry
  • Power plant technology
  • Pulp and paper industry
  • Mining industry
  • Food and beverage industry
  • Sugar industry
  • CCUS
  • Lithium
  • Hydrogen
  • Sustainable plastics production
  • Alternative fuels production
  • Power generation
  • Nuclear power technology
  • Centrifugal pumps
  • Eccentric screw pumps
  • Universally applicable

Recommended piping plans

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
EagleBurgmann MultiFlow Unit (MFU)
EagleBurgmann BestFlow

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