Item Description
1 Seal face
2 Spring
3 Seat
4 Shaft sleeve
5 Cover
6 Multipoint injection (Optional)



  • Single seal in cartridge design
  • Balanced
  • Multiple springs
  • Stationary spring loaded unit
  • Shrink-fitted seal face
  • Rugged mating ring


  • Deformation-optimized seal for high sliding velocities and high pressures
  • Economical due to standardized inner components
  • High flexibility due to adaptation of the connection parts to the pump seal chamber
  • Insensitive to shaft deflections due to stationary design
  • Pre-assembled unit for quick and easy installation
  • Suitable for use in compliance with API 682, type ES
  • Version with loose-fitted seal face available, for extreme applications
  • Only small number of components

Operating range

Shaft diameter:
d1* = 30 ... 140 mm (1.1811" ... 5.5118")
Other sizes on request
t = -40 °C ... +380 °C (-40 °F ... +716 °F)
With adapted cooling devices for high temperature applications
Sliding velocity: vg = 50 m/s (164 ft/s)
Axial movement: ±3 mm

Sliding material combination: AQ2
Dynamic pressure: p1 = 100 bar (1,450 PSI)
Static pressure: p1 = 240 bar (3,481 PSI)

Sliding material combination Q3Q2:
Dynamic pressure: p1 = 120 bar (1,740 PSI)
Static pressure: p1 = 160 bar (2,320 PSI)


Seal face:
Carbon graphite antimony impregnated (A), silicon impregnated carbon (Q3)
Seat: Silicon carbide (Q2)
Secondary seals: FKM (V), FFKM (K), EPDM (E)
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1), Super Duplex (G4)

Other materials on request

Standards and approvals

  • Following the API 682 / ISO 21049

Recommended piping plans

Product variants

Same design as SHV but with loosely inserted seal face for extreme applications (high pressures, pressure variations, temperature variation).
Dynamic pressure: p1 = 200 bar (2,900 PSI)
Static pressure: p1 - 240 bar (3,481 PSI)
SHV with integrated pumping device for optimal heat dissipation.

Similar products


  • Dry gas seal for multiphase pump applications
  • DiamondFace sliding surface technology
  • Ideal for applications with Ethane, CO2, and similar media with low vapor margins
  • Shrouded rotating ring
  • Bi-directional
  • Ready-to-fit cartridge unit
  • Single, double, tandem, and tandem with intermediate labyrinth available

DF-SA DiamondFace

  • Cartridge design
  • Single seal
  • Balanced
  • Integrated pumping device
  • Stationary spring loaded unit
  • Inserted seal ring
  • Rotating mating ring
    (DiamondFace coated)


  • Single seal
  • Balanced
  • Independent of direction of rotation
  • Multiple springs stationary
  • Seat rotating
  • Seat arranged directly behind the impeller
  • Spring protection sleeve
  • Variant with cylindrical spring and acc. EN 12756 (HRZ1) available
  • Variant as cartridge with/without guide sleeve for application with/without quench (HR2, HR3)
  • Dual seal as cartridge unit (HRKS-D) available

Inquire about individual solutions

We develop and produce customer-specific special and individual solutions for every application.

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