Overview
G™ Rotary Unions are precision-engineered components designed for high-speed fluid and air transfer in applications such as machine tools, CNC machines, and drilling equipment. They ensure effective cooling and lubrication with a leak-free seal design and vibration-free operation.

Specifications
The rotary unions come in various types with specific maximum pressure, temperature, and speed ratings. For example, the GA type can handle up to 105 BAR and 120°C at 6,000 RPM, while the GHP type can manage 140 BAR at 32,000 RPM. Overall, the unions operate under pressures ranging from 10 to 150 bar and temperatures up to 120°C, with some models supporting speeds up to 42,000 RPM.

Features and Benefits
- Precision ball bearings lubricated for life
- Hardened stainless steel rotor
- Optimized seal balance for minimal friction
- Anodized aluminum or brass body
- Non-contacting seal rings available for certain models
- Special seal designs for dry running and leakage prevention
- High precision angular contact bearings
- Drain holes and labyrinth seals for bearing protection and coolant evacuation
- Multi-passage designs for air and oil with proprietary seals

Types and Applications
- GA General Purpose Unions: Suitable for air, coolant, and hydraulic oil
- GAI Internal Mounted Unions: Compact design for internal shaft mounting
- GFR/GFRA Coolant Unions: Designed for dry running
- GFL/GFLA Coolant Unions: Allow dry running with reduced coolant misting
- GFS/GFSA Coolant Unions: For high-speed applications
- GFP/GFPA Coolant Unions: Feature angular ball bearings and stainless steel components
- GB High Pressure Unions: Suitable for water and hydraulic oil

Recommendations
Users should avoid operating the unions at the maximum combination of pressure, temperature, and speed to ensure longevity and optimal performance. Consulting the factory or detailed catalogue for specific application parameters is recommended.

Installation and Maintenance
Proper installation with flexible hoses is crucial to avoid side loading. Seal faces are lubricated by the media passing through the union, and ball bearings are lubricated for life. Filtration should follow machinery OEM recommendations.

Guarantee and Support
G unions are warranted against manufacturing defects for 12 months. A global sales and service network provides support in over 150 countries.

Conclusion
G™ Rotary Unions are robust and versatile components designed to meet the demanding needs of various industrial applications, offering reliable performance and extended service life.