Item Description
1.1.1 Seal face
1.1.3 Spring
1.2 Seat
2 Shaft sleeve
4 Clamping sleeve
6 Housing
8 Cover
10 Pumping sleeve
12 Assembly fixture
14 Shrink disk



  • Dual seal in face-to-face arrangement
  • Cartridge design
  • Balanced
  • Multiple springs arrangement
  • Stationary spring loaded unit
  • Shrink-fitted seal rings
  • Rugged mating rings


  • Deformation-optimized seal for high pressures and high sliding velocities
  • 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
  • Dual seal does not open even in the event of barrier fluid pressure failure
  • Reliable operation due to one rugged seat with bandage
  • Version with loose-fitted seal face available, for extreme applications
  • Only small number of components

Operating range

Shaft diameter:
d1 = 40 ... 110 mm (1.57" ...4.33")
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: ±3,0 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 faces: Carbon graphite antimony impregnated (A), silicon impregnated carbon (Q3)
Seats: 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

Process side*:
API Plan 01
API Plan 02
API Plan 03
API Plan 11
API Plan 12
API Plan 13
API Plan 14
API Plan 21
API Plan 22
API Plan 31
API Plan 32
API Plan 41

Between seals:
API Plan 53A
API Plan 53B
API Plan 53C
API Plan 54

Atmospheric side**:
API Plan 61
API Plan 62
API Plan 65A
API Plan 65B

* Piping plans 11 ... 41: Integration in seal to be dimensionally checked.
** Throttle bushing on request.

Product variants

SHFV / SHPV double seal:
SHV-D design with integrated pumping device for optimal heat dissipation.
SHVI double seal:
Same design as SHV-D 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)

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.

Inquire now Discover reference projects
Back to the overview