Live metrology bench · Station 04 · GermanyAlloy: Ni-Hard / 15Cr-3Mo · Hardness 60–66 HRC
DUO-CONE is a specialised German manufacturer and global distributor of heavy-duty mechanical face seals. From our central warehouse in Engelskirchen we keep immediate availability and direct engineering support for customers across Europe and worldwide.
Every duo cone seal is a symmetrical pair. One half turns with the shaft, the other stays with the housing, and the two are mirror images of each other.
01
Two metal sealing rings
Identical hardened cast-iron rings. Their front faces are lapped optically flat and run against each other as the dynamic sealing interface.
02
Two elastomeric toric rings
Round-section rubber rings seated on angled housing ramps. They hold the metal faces together with a calibrated axial load and seal statically against the housing and the metal ring.
[ Functionality ]
How a duo cone seal works
The seal has no lip and never touches the shaft. All of the sealing happens at the two polished metal faces pressed together in the middle.
Face contact under load
The compressed toric rings push the two lapped metal faces together. Contact pressure stays roughly constant as the faces wear, so the seal keeps working for its full service life.
Hydrodynamic oil film
A microscopic film of gear oil is drawn between the rotating faces. It carries the load, removes friction heat and prevents metal-to-metal galling.
Contamination exclusion
The outer edge of the face contact wipes mud, water, sand and slurry away from the sealed cavity. Nothing abrasive reaches the bearings.
Self-adjusting alignment
The toric rings let each metal ring float and tilt slightly, so the faces stay parallel through shaft deflection, axle flex and thermal movement.
50 to 1420 mmOuter diameter
up to 10 m/sSurface speed
within 2 helium light bandsFace flatness
−60 °C to +200 °CTemperature
[ Value proposition ]
The DUO-CONE advantage
Built to eliminate industrial downtime and streamline heavy parts procurement.
01 // Inventory
Immediate availability
A comprehensive inventory of standard DO and DF types physically stocked in Engelskirchen, ready to halt field-equipment downtime the day you call.
02 // Velocity
24-hour responsiveness
Our technical desk returns binding quotations, cross-reference matrices and CAD cross-section validation within one working day.
03 // Consultancy
Direct specialist service
Talk straight to senior sealing engineers. No call switches, no uninformed ticket queues. Get metallurgical answers immediately.
04 // Network
Pan-European reach
Optimised ground dispatch across Germany and the EU, plus priority air courier for emergency global mining and tunnelling operations.
[ Industrial ecosystem ]
Closed-loop quality
Connecting European metallurgy directly with field performance.
01
Cast metallurgy control
High-alloy chilled cast iron (Ni-Hard) formulations with a martensitic microstructure for abrasion resistance.
02
Elastomer compound science
NBR, HNBR, FKM (Viton) and silicone load rings formulated for near-zero permanent set from −40 °C to +200 °C.
03
Field application diagnostics
Feedback from heavy earthmoving and continuous tunnel-boring fleets feeds back into ongoing seal-geometry refinement.
Rapid response guarantee
Let’s engineer your sealing solution.
Send us your OEM part number, sample dimensions or drawing. Our application specialists in Engelskirchen return your quotation within 24 hours.
SAPPARTS EUROPE GMBH · Benzstraße 21, 51381 Leverkusen, Germany · DIN EN ISO 9001:2015 certified facility. All trademarks are the property of their respective OEM owners.
Live metrology bench · Station 04 · GermanyAlloy: Ni-Hard / 15Cr-3Mo · Hardness 60–66 HRC