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CTX ANSI Single Seals
Mechanical Seals for Pumps

Product Description

  • Single seal
  • Available for standard (CTX-ASPN) and big
    bore (CTX-ABPN) seal chambers
  • Balanced
  • Cartridge
  • Independent of direction of rotation
  • Single seals with flush (-ASPN, -ABPN) and
    with quench combined with lip seal (-ASQN,
    - ABQN) or throttle ring (-ASTN, -ABTN)


Item No. Description
1 Seal face
2, 5, 7 O-Ring
3 Spring
4 Seat
6 Shaft sleeve
8 Drive collar
9 Set screw
10 Snap ring
11 Cover
12 Assembly fixture (remove after installation)
13 Screw
14 Gasket
15 Screw plug
16 Lip seal (-QN), throttle ring (-TN)

Technical Features

  • Ideal for use in ANSI process pumps
  • No damage of the shaft by dynamically
    loaded O-Ring
  • No dimensional modification of the seal
    chamber necessary, small radial installation
  • Universal applicable for packings
    conversions, retrofits or original equipment

Typical Industrial Applications

  • ANSI process pumps
  • Chemical industry
  • Food and beverage industry
  • Petrochemical industry
  • Pharmaceutical industry
  • Universally applicable
  • Water and waste water technology




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), Perflourocarbon rubber/PTFE
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), CrNiMo cast steel (G)

Performance Capabilities

Sizes: Upto 100 mm (Upto 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)
Speed = 16 m/s (52 ft/s)
Sliding face material combination Q1Q1 or U2Q1
Pressure: p1 = 12 bar (175 PSI)
Speed = 10 m/s (33 ft/s)
Permissible axial movement: ± 1.0 mm, d1 ≥ 75 mm
± 1.5 mm

CTX ANSI Single Seals

Standard Cartridge Seals

Mechanical Seals As Per API 682

Split Seals

Engineered Seals For Demanding Applications

Standard Mechanical Seals For Pumps & Compressors

Mechanical Seals For Agitators, Mixers, Kneaders & Reactors

Supply Systems & Components

API 682 / ISO 21049

Technical Information