Asten Controls LLP

Roto Seal Coupling – High-Performance Rotary Union for Fluid & Air Transfer

The Roto Seal Coupling, also known as a Rotary Union or Rotating Seal Coupling, is a precision-engineered component designed to transfer fluids, air, steam, oil, or hydraulic media between stationary and rotating parts of equipment. It enables smooth, leak-free, and continuous rotation while maintaining a tight seal under high pressure and temperature conditions.

Manufactured using premium-grade materials such as brass, stainless steel, mild steel, or aluminum, these couplings are ideal for use in CNC machinery, printing rollers, paper mills, textile processing, chemical plants, and other applications requiring reliable rotary fluid connections.

• ✔️ Design Type: Single Flow / Double Flow Rotary Union

• ✔️ Size Range: ¼” to 2½” BSP/NPT Threaded / Flanged

• ✔️ Materials: Brass, SS304, SS316, Mild Steel, Aluminum

• ✔️ Seal Options: Carbon-to-Carbon, Carbon-to-Ceramic, Nitrile, Viton, PTFE

• ✔️ Max Pressure: Up to 10,000 PSI (model-specific)

• ✔️ Temperature Range: -20°C to +180°C

• ✔️ Speed Rating: Up to 3000 RPM

• ✔️ Media Compatibility: Air, Steam, Water, Coolants, Oil, Hydraulic Fluids

• ✔️ Mounting: Rotor-mounted / Stator-mounted / Flanged / Threaded

• Hydraulic and Pneumatic Equipment

• CNC Machines – Coolant and Oil Transfer

• Textile Machines – Dryers, Calenders, Dyeing Rollers

• Printing & Paper Machinery

• Food Processing Machines

• Chemical Transfer and Reactors

• Plastic & Rubber Extrusion Machinery

• ✅ Single Passage Roto Seal Coupling

• ✅ Dual Flow (Double Passage) Coupling

• ✅ Multi-Port Rotary Unions

• ✅ High-Speed / High-Temperature Versions

• ✅ Explosion-proof Rotary Seals (on request)

• ✅ Hose Tail and Flanged Models