Rotary Unions
What Are Rotary Unions?
Rotary unions are mechanical devices designed to transfer fluids, air, steam, coolant, or hydraulic media from a stationary source to rotating equipment. They provide a sealed connection between stationary supply lines and rotating components, enabling reliable media transfer while minimizing leakage and wear. Rotary unions are used in a wide range of industrial applications where continuous rotation and fluid transfer are required. Weimer supplies and stocks a broad range of rotary unions to support manufacturing, machining, processing, automation, and power transmission applications across a variety of industries.
Applications
Weimer supplies rotary unions for a wide range of industrial applications where fluids or gases must be transferred to rotating equipment.
- Machine tools and CNC equipment
- Printing and converting machinery
- Paper and paper processing equipment
- Steel, rubber, and plastics manufacturing
- Packaging and automation systems
- Rotary tables, indexing equipment, and winding machinery
- Hydraulic, pneumatic, and coolant transfer applications
Key Features and Benefits
Rotary unions provide reliable fluid and media transfer while supporting continuous equipment operation in demanding industrial environments.
- Enables fluid, air, steam, coolant, and hydraulic transfer to rotating equipment
- Supports continuous operation while maintaining a sealed connection
- Reduces leakage and media loss
- Available in single-passage and multi-passage designs
- Designed for a wide range of pressures, temperatures, and speeds
- Available in a variety of materials including brass, stainless steel, aluminum, and specialty materials
Types of Rotary Unions
Weimer offers rotary unions for a wide range of media transfer applications, including air, coolant, steam, water, hydraulic oil, thermal oil, and multiple media systems.
Choosing the Right Rotary Union
Rotary union performance depends on proper sizing, media compatibility, and operating conditions. Weimer works with customers to identify solutions that meet performance and application requirements.
- Media Type
Determine whether the application involves air, water, coolant, steam, hydraulic fluid, oil, or other media. - Number of Passages
Single-passage and multi-passage designs are available depending on media transfer requirements. - Operating Pressure
The rotary union must be rated for the application's maximum pressure requirements. - Operating Temperature
Media and environmental temperatures affect seal and material selection. - Rotational Speed
RPM requirements influence bearing design, sealing technology, and overall performance. - Connection Type
Available with a variety of thread, flange, and custom connection options. - Seal Material
Seal selection should be compatible with the media and operating conditions. - Material Construction
Available in brass, stainless steel, aluminum, and specialty materials to meet application requirements.
Related Products
Weimer is Your Source for Rotary Unions
Weimer is an authorized distributor for leading rotary union manufacturers worldwide, with a wide range of local inventory and industrial parts available across the United States for same-day pickup and delivery. We support customers throughout Wisconsin, Illinois, Minnesota, Michigan, Iowa, Indiana, North Carolina, South Carolina, Arkansas, Tennessee, South Dakota, Colorado, Texas, and beyond.
Technical Expertise You Can Rely On
Weimer works directly with your team to deliver the support and resources needed for your application. From initial product selection to ongoing operation, we help ensure the right solution is in place to keep your equipment running reliably.
- Application review and product selection guidance
- Cross-referencing and sourcing for existing equipment
- Access to a broad range of trusted manufacturers
- Fast response to help minimize downtime
- Reliable delivery across the U.S.
Our Locations
With 40+ stocking locations, we provide local inventory, responsive service, and the technical expertise to keep your operation moving.
Questions?
Our team is ready to help you. Contact us to learn more about our products and services.