Overview & Technology:
The SHOWA GIKEN RXS Series Heavy-Duty Rotary Joints (Rotary Unions), engineered by SHOWA GIKEN INDUSTRIAL CO., LTD. (Japan), are premium high-capacity fluid transfer units designed specifically for large pipe diameters (ranging from 25A up to 100A) operating under elevated temperatures and demanding pressures. Featuring advanced spherical carbon/ceramic seal technology and a self-aligning mechanical structure, the RXS series effectively absorbs roll run-out, thermal expansion, and angular misalignment without compromising sealing integrity.

Key Features & Highlights:
• Extreme Temperature & High-Flow Capacity: Engineered specifically for high-pressure saturated steam and hot thermal oil circuits within large-scale industrial drying rolls.
• Comprehensive Flow Configurations:
  - Simplex Single-Passage (e.g., RXS 7838 100A, RXS 0503 80A, RXS 9063 80A): Provides maximum media throughput with minimal piping pressure drop.
  - Duplex Coaxial Passages with Siphon Pipe (e.g., RXS 0700 80A-40A, RXS 8167 25A-10A, RXS 0503 80A-40A): Enables concurrent steam delivery and continuous condensate evacuation, maximizing thermal transfer efficiency.
• Self-Aligning Spherical Sealing: Spherical graphite seal rings accommodate journal deflection and thermal expansion smoothly, eliminating seal cracking under severe loads.
• Heavy-Duty Flanged / Threaded Standards: Guarantees rigid mechanical attachment and absolute operational safety across high-pressure installations.

Durability & Heavy-Duty Construction:
The housing body is cast from heavy-duty ductile iron or high-grade alloy steel complying strictly with Japanese Industrial Standards (JIS). Internal wear components feature hardened surfaces that withstand thermal shocks and chemical erosion, ensuring continuous multi-year operational reliability.

Practical Value for QA/QC:
Installing SHOWA GIKEN RXS Series rotary joints prevents condensate pooling inside drying drums, stabilizes surface thermal profiles across paper/carton/rubber lines, eliminates catastrophic seal blowouts, and reduces maintenance downtime.

• Manufacturer: SHOWA GIKEN INDUSTRIAL CO., LTD. (SGK)
• Product Category: Heavy-Duty High-Temperature Rotary Joint / Rotary Union
• Series: RXS Series
• Country of Origin: Japan
• Applicable Media: Saturated Steam, Thermal Oil, Hot/Cold Water, Compressed Air
• Maximum Operating Temperature: Up to 200°C - 230°C (depending on seal material configuration)
• Maximum Operating Pressure: Up to 1.5 - 2.0 MPa (~15 - 20 bar)
• Maximum Rotation Speed: 300 - 800 RPM (optimized for large-diameter processing rolls)
• Connection Standards: JIS Flanged Standard or Specialized Heavy-Duty Threads

DETAILED MODEL DESIGNATIONS:
• RXS 7838 100A: Simplex single-passage heavy-duty rotary joint, nominal port size 100A (4").
• RXS 0700 80A-40A: Duplex dual-passage rotary joint, outer casing 80A (3"), internal siphon pipe 40A (1-1/2").
• RXS 8167 25A-10A: Duplex dual-passage rotary joint, outer casing 25A (1"), internal siphon pipe 10A (3/8").
• RXS 0503 80A: Simplex single-passage rotary joint, nominal port size 80A (3").
• RXS 0503 80A-40A: Duplex dual-passage rotary joint, outer casing 80A (3"), internal siphon pipe 40A (1-1/2").
• RXS 9063 80A (RXS9063 80A): RXS 9000 series specialized rotary joint, nominal port size 80A (3").

DESIGNATION SYSTEM NOTES:
• RXS [Model Number]: High-temperature heavy-duty rotary joint series by Showa Giken.
• [Single Size]: Nominal port diameter (100A = 4 inch, 80A = 3 inch, 25A = 1 inch).
• [Outer Size]-[Inner Size]: Duplex supply and internal siphon return configuration (e.g., 80A-40A).