Item Description
1 Seal face
2 Face housing
3 Seat
4 Shaft sleeve
5 Housing
6 Set ring
Typical fluids in pipeline applications



  • Robust seal design - suitable for demanding light hydrocarbon applications
  • Compact cartridge seal for small seal chambers
  • Single unpressurized seal with a high pressure-non contacting containment seal
  • Stationary spring loaded unit
  • Balanced primary seal faces in materials with high thermal conductivity and strength
  • Multi-point injection of the flush fluid optional
  • Seal faces can be equipped with lubrication enhancing grooves and/or DiamondFace technology


Operational Excellence
  • High Performance seal for single and multi fluid type pipeline services with variable pressures and speeds
  • Low amount of heat generation, hence minimal temperature rise in the seal faces
  • Suitable for flashing and non-flashing light hydrocarbons, even with low vapor pressure margins
  • Seal faces have soft torque transmission
  • Seal faces are shrouded in steel collars so that they cannot break apart in pieces in an emergency case
  • Resistant to alignment issues between the pump case and shaft because of stationary springs
  • Containment seal is rated for full dynamic pressure of primary seal, i.e. high degree of safety and environmental protection
  • Seal face materials are resistant to solids in the pumped fluid

Technical Excellence
  • Simple installation due to pre-assembled cartridge
  • Seal faces are designed with FEA & CFD and qualified & tested in the lab
  • Can be fitted in older pumps with small seal chambers or stuffing boxes
  • High degree of standardization ensures fast deliveries and smart part inventories

Sustainability Excellence
  • Zero emission seal design for sustainable environmental protection in combination with plan 75 or plan 76
  • Minimized friction and energy consumption

Operating range

Shaft diameter:
d1* = 50 ... 150 mm (1.97" ... 5.91")
Pressure: p1 = 100 bar (1,450 PSI),
Static: up to 150 bar (2,175 PSI),
Dynamic: up to 100 bar (1,450 PSI)
Temperature: t = -20 ... +100 °C (-4 ... 212 °F)
Sliding velocity: vg = 50 m/s (164 ft/s)
Axial movement: ±1 mm

* Additional sizes upon request


Seal face:
Silicon impregnated carbon (Q3), DiamondFace
Stationary seat: Silicon carbide (Q2), DiamondFace
Secondary seals: FKM (V), FFKM (K)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1), Super Duplex (G4), Titan (T2), Hastelloy® C-4 (M)