Overview & Technology:
The SHOWA GIKEN AC, ONC, ACZ, ACLF, and ACF Series Rotary Joints (Rotary Unions), engineered by SHOWA GIKEN INDUSTRIAL CO., LTD. (Japan), deliver versatile fluid conveyance and recirculation solutions for industrial rotating machinery ranging from light to heavy-duty applications. Incorporating proprietary mechanical seal technology constructed from high-grade Carbon, Silicon Carbide, and Engineering Ceramics, these joints eliminate fluid leakage and maintain exceptional operational stability under high pressures and rotational speeds.

Key Features & Highlights:
• Comprehensive Series Portfolio:
  - ONC Series (ONC 0434): Specialized dual-passage rotary union engineered for high-precision printing presses, optical measurement rolls, and precision cooling rolls.
  - AC / ACZ Series: Coaxial dual-flow (Duplex) design featuring an internal siphon pipe, enabling simultaneous supply and return circulation within a single journal connection.
  - ACLF / ACF Series: Heavy-duty flanged connection design capable of supporting large pipe dimensions such as 65A-25A with superior mechanical rigidity.
• Self-Tightening Thread Orientations:
  - Right-Hand Thread (RH): Self-tightening during clockwise shaft rotation.
  - Left-Hand Thread (LH): Self-tightening during counter-clockwise shaft rotation.
• Precision Dual Ball Bearings: Ensures smooth rotation, minimizes run-out vibration, lowers starting frictional torque, and reduces drive motor power requirements.

Durability & Heavy-Duty Construction:
The casing body is precision-machined from pressure-resistant bronze alloys or JIS-standard cast steel. It reliably withstands hydraulic shock pulses and chemical fluid corrosion, ensuring continuous 24/7 heavy-duty operation without demanding frequent relubrication.

Practical Value for QA/QC:
Deploying SHOWA GIKEN AC / ONC / ACF Series rotary unions stabilizes coolant supply and thermal distribution across processing rolls, mitigates unplanned line downtime caused by seal failure, improves CNC machining accuracy, and maximizes overall production uptime.

• Manufacturer: SHOWA GIKEN INDUSTRIAL CO., LTD. (SGK)
• Product Category: Industrial Rotary Joint / Rotary Union
• Series: AC Series, ONC Series, ACZ Series, ACLF Series, ACF Series
• Country of Origin: Japan
• Applicable Media: Coolant / Water, Hydraulic Oil, Lubricating Oil, Compressed Air
• Maximum Operating Temperature: Up to 100°C - 120°C (depending on model and media)
• Maximum Operating Pressure: Up to 1.0 - 1.5 MPa (~10 - 15 bar)
• Maximum Rotation Speed: 800 - 3000 RPM (depending on nominal port size)
• Connection Standards: JIS / RC Standard Thread or Flanged Type

DETAILED MODEL DESIGNATIONS:
• ONC 0434 40A-15A RH: ONC series rotary joint, casing 40A (1-1/2"), internal pipe 15A (1/2"), Right-Hand Thread (RH).
• ONC 0434 40A-15A LH: ONC series rotary joint, casing 40A (1-1/2"), internal pipe 15A (1/2"), Left-Hand Thread (LH).
• AC 20A 8A LH: AC series duplex rotary joint, casing 20A (3/4"), internal pipe 8A (1/4"), Left-Hand Thread (LH).
• AC 20A 8A RH: AC series duplex rotary joint, casing 20A (3/4"), internal pipe 8A (1/4"), Right-Hand Thread (RH).
• AC 50A-25A RH: Large size AC series duplex rotary joint, casing 50A (2"), internal pipe 25A (1"), Right-Hand Thread (RH).
• ACZ 40A-20A LH: Specialized ACZ series rotary joint, casing 40A (1-1/2"), internal pipe 20A (3/4"), Left-Hand Thread (LH).
• ACLF 20A: ACLF series flanged rotary joint, nominal port size 20A (3/4").
• ACF-65A-25A: High-capacity ACF series flanged rotary joint, casing 65A (2-1/2"), internal siphon pipe 25A (1").

DESIGNATION SYSTEM NOTES:
• AC / ONC / ACZ [Casing]-[Internal]: Coaxial dual-flow supply and return circuit.
• ACF / ACLF: Heavy-duty flanged connection type for high structural stability.
• RH (Right Hand): Clockwise rotation tightening direction.
• LH (Left Hand): Counter-clockwise rotation tightening direction.