Overview & Technology:
The SHOWA GIKEN SK Series Large-Bore Rotary Joints (featuring models SK2119 150A and SK 2243 150A), manufactured by SHOWA GIKEN INDUSTRIAL CO., LTD. (Japan), are heavy-duty fluid transfer components designed specifically for severe industrial rotating applications requiring extra-large bore pipe sizes (150A / 6 inches). Equipped with an exclusive heavy-duty mechanical seal system constructed from refined wear-resistant Carbon and Engineering Ceramics/Silicon Carbide, these units accommodate massive fluid flow rates while ensuring leak-free performance and maintaining pressure integrity.

Key Features & Highlights:
• Extra-Large 150A (6 Inch) Bore Size: Delivers a massive internal flow cross-section, minimizing pipeline pressure loss and meeting extreme cooling or heating throughput demands for heavy industrial rolls.
• Heavy-Duty Mechanical Face Seals: Delivers superior friction resistance with automatic wear compensation, eliminating media leakage even under continuous fluctuations in pressure and temperature.
• Heavy-Duty Dual Bearing Assembly: Large-diameter precision bearing arrangement engineered to withstand heavy radial and thrust loads caused by pipe weight and internal fluid forces.
• High-Rigidity Flanged Mounting: Ensures solid mechanical coupling and maximum operational safety on heavy industrial journals.

Durability & Heavy-Duty Construction:
The housing body is cast from pressure-resistant ductile iron or alloy cast steel complying with Japanese Industrial Standards (JIS). It provides high structural strength against vibration, chemical corrosion, and sudden thermal shocks, ensuring continuous 24/7 multi-year operational reliability in aggressive mill environments.

Practical Value for QA/QC:
Deploying SHOWA GIKEN SK2119 150A / SK 2243 150A rotary joints guarantees maximum cooling efficiency across steel rolling mills and large paper drying drums, prevents catastrophic seal blowouts that lead to line stoppages, reduces plant maintenance overhead, and prolongs machinery service life.

• Manufacturer: SHOWA GIKEN INDUSTRIAL CO., LTD. (SGK)
• Product Category: Heavy-Duty Large-Bore Rotary Joint / Rotary Union
• Series: SK Series
• Country of Origin: Japan
• Nominal Port Size: 150A (6 inches)
• Applicable Media: High-Volume Cooling Water, Saturated Steam, Thermal Oil
• Maximum Operating Temperature: Up to 120°C - 180°C (depending on media and seal configuration)
• Maximum Operating Pressure: Up to 1.0 - 1.5 MPa (~10 - 15 bar)
• Maximum Rotation Speed: 100 - 300 RPM (optimized for extra-large diameter rotating machinery)
• Connection Standard: JIS Heavy-Duty Flange Standard

DETAILED MODEL DESIGNATIONS:
• SK2119 150A: Heavy-duty large-bore rotary joint 150A (6"), optimized for maximum flow rate capacity.
• SK 2243 150A: Heavy-duty large-bore rotary joint 150A (6"), reinforced for high pressure and heavy mechanical rigidity.

DESIGNATION SYSTEM NOTES:
• SK [Model Number]: Heavy-duty large-bore rotary joint series by Showa Giken.
• 150A: Nominal pipe diameter 150 mm (equivalent to 6 inches).