Item Description
1.1.1 Seal face
1.1.3 Spring
1.2 Seat
2 Shaft sleeve
6 Cover
9 Assembly fixture
14 Shrink disk



  • Cartridge design
  • Single seal
  • Balanced
  • Multiple springs
  • Stationary spring loaded unit
  • Shrink-fitted seal face


  • Deformation-optimized seal for high pressures and high sliding velocities (static up to 500 bar (7,250 PSI) and dynamic up to 150 bar (2,175 PSI))
  • 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* = 40 ... 250 mm (1.57" ... 9.84")
Pressure: p1 = 150 bar (2,175 PSI)
Temperature: t = +200 °C (+394 °F),
Sliding velocity: vg = 60 m/s (197 ft/s)
Axial movement: ±3 mm

* Other sizes on request


Seal face:
SiC-C-Si silicon impregnated carbon (Q3), Carbon graphite antimony impregnated (A)
Seat: Silicon carbide (Q)
Secondary seals:
Springs: Hastelloy® C-4 (M)
Metal parts: CrNiMo steel (G), Duplex (G1), Super Duplex (G4), Titanium (T2), Hastelloy® C-4 (M)

Standards and approvals

  • API 682 / ISO 21049

Product variants

SH(V)I Same design as SH(V) but with loosely inserted seal face for extreme applications.
Pressure: p1 = 200 bar (2,900 PSI)