DF-SA DiamondFace

DF-SA DiamondFace For a larger view, please mouseover the image.
For a larger view, please mouseover the image.
Item Description
1 Seal ring
2 O-Ring
3 Spring
4 O-Ring
5 Seat collar
6 Mating ring (DiamondFace coated)
7 Shaft sleeve
8 Pumping sleeve
9 Cover
  • Cartridge design
  • Single seal
  • Balanced
  • Integrated pumping device
  • Stationary spring loaded unit
  • Inserted seal ring
  • Rotating mating ring
    (DiamondFace coated)
  • Resistant to electrochemical corrosion.
  • Extremely long service life (>40,000 h).
  • No dosing system, no cooling circuit conditioning required.
  • Diamond coating provides very low friction, thus reduced power consumption.
  • Deformation-optimized for high sliding velocities and medium pressures.
  • Economical due to standardized components.
  • High flexibility due to adaptation of the connection parts to the pump seal chamber.
  • Optimum heat dissipation due to integrated pumping device and optimized seat / seal face design.
Shaft diameter:
d1* = 120 ... 250 mm (4.72" ... 9.84")
Pressure: p1 = 70 bar (1,015 PSI)
Temperature: t = 300 °C (572 °F)
Sliding velocity: vg = 70 m/s (330 ft/s)
Axial movement: ±3 mm

* Other sizes on request
Seal face: Composite carbon
Seat: SiC DiamondFace coated
Secondary seals: EPDM (E), FFKM (K)
Springs: CrNiMo steel (G)
Metal parts: CrNiMo steel (G)
  • Power plant technology
  • Boiler feed pumps
API Plan 02 + 23 (with jacket cooling)