Synertech Stock
G2 Rotary Shaft Seals
Type G2 (G-DUO) oil seals are special oil seals for dynamic and bidirectional rotary applications.
Product codes
Details
G2 (G-DUO) type sealing rings are special oil seals for dynamic bidirectional rotary applications. The profile is designed with two opposing sealing lips, energized by two independent springs, providing separation between two fluids or a barrier against heavy contamination from the outside.
G2 / G-DUO configuration
Double lip with double spring
The configuration uses two opposing sealing lips, each preloaded by its own garter spring, combined with an internal metal structure featuring an inverted "T" geometry.
Materials and operating conditions
| Material | Speed | Temperature | Pressure |
|---|---|---|---|
| NBR | 6.0 m/s | −40 / +100 °C | 0.05 MPa (0.5 bar) |
| Viton / FKM | 6.0 m/s | −30 / +200 °C | 0.05 MPa (0.5 bar) |
Lubricating oils, mineral and synthetic greases, hydraulic fluids and water.
Main features
Double-spring design
Two independent sealing lips, each energized by a steel garter spring, ensure constant contact pressure on both sides.
Internal "T"-shaped metal case
The structural metal insert is embedded in the rubber with a reinforced geometry that provides structural rigidity and stability within the housing.
Bidirectional function
The profile is designed to simultaneously isolate two different fluids or to prevent the ingress of mud, water and abrasive dust from the outside.
Advantages of the G2 profile
Isolation
High sealing capability between two adjacent compartments, for example between a gearbox and the external environment or between an oil chamber and a grease chamber.
Press-fit stability
The robust internal metal case counteracts accidental displacement or misalignment of the oil seal during shaft rotation.
Application flexibility
Available in NBR for standard industrial applications and in FKM/Viton for high-temperature applications or use in the presence of aggressive chemicals.
Typical applications
- Industrial gear reducers and gearboxes
- Hydraulic pumps and agitation and mixing systems
- Wheel hubs and axles for agricultural and earth-moving machinery
- Machinery for the paper and steel industries
- Marine and automotive applications on auxiliary drive shafts
Certifications
Company certifications and production standard specifications for this profile are currently being defined.
Available configurations
G2 / NBR
Standard version made of nitrile rubber with carbon-steel springs. This configuration is suitable for general-purpose applications with mineral oils and greases.
G2 / VITON
High-performance version made of FKM fluoroelastomer, with springs also available in stainless steel to increase corrosion resistance.
Cross-reference and special configurations
| Manufacturer | Equivalent |
|---|---|
| Trelleborg | DUO Profile |
| Freudenberg (Simrit) | Special bidirectional profile |
| Parker Prädifa | Combined rotary profile |
| Dichtomatik | TC dual spring profile |
G2/L
Special versions with asymmetric lips or increased thicknesses for heavy-duty industrial applications.
G2/HD Heavy Duty
Custom configurations with exposed outer metal case or reinforcements for pressures slightly higher than standard.