Overview & Technology:
The SHOWA GIKEN RXE Series Rotary Joints (including RXE 2000 and RXE 3000 series variations), engineered by SHOWA GIKEN INDUSTRIAL CO., LTD. (Japan), are premium fluid-transfer components designed to connect stationary piping with rotating machinery shafts. Renowned worldwide for their proprietary mechanical seal technology, RXE rotary joints prevent media leakage even under demanding rotational speeds, high operating pressures, and continuous thermal fluctuations.

Key Features & Highlights:
• Versatile Flow Configurations:
  - RXE 2120 / RXE-2120: Dual-flow Duplex structure enabling simultaneous supply and return circulation through an internal siphon pipe, saving journal space.
  - RXE 3020 / RXE 3015: High-efficiency design facilitating laminar fluid flow and high volume throughput.
• Self-Tightening Thread Orientations:
  - Right-Hand Thread (RH): Self-tightens when roller rotates clockwise.
  - Left-Hand Thread (LH): Self-tightens when roller rotates counter-clockwise.
• Precision Dual Bearings: Substantially lowers starting and running torque, reduces vibrational wear, and reduces motor energy demand.
• Heavy-Duty Mechanical Face Seals: Features Carbon/Silicon Carbide/Ceramic mating faces that reliably isolate fluids, preventing hot oil and steam seepage over extended life cycles.

Durability & Heavy-Duty Construction:
The housing is precision-machined from robust copper alloys and JIS-compliant stainless steel. It withstands rapid thermal cycling and chemical oxidation, delivering dependable, maintenance-free performance in demanding industrial plants.

Practical Value for QA/QC:
Installing SHOWA GIKEN RXE 2120 / 3020 / 3015 rotary unions maintains homogeneous temperature profiles across heating and cooling rolls, mitigates unplanned line shutdowns caused by seal failure, and maximizes production uptime.

• Manufacturer: SHOWA GIKEN INDUSTRIAL CO., LTD. (SGK)
• Product Category: Industrial Rotary Joint / Rotary Union
• Series: RXE Series (RXE 2000 & RXE 3000 Series)
• Country of Origin: Japan
• Applicable Media: Saturated Steam, Hot/Cold Water, Thermal Oil, Compressed Air
• Maximum Operating Temperature: Up to 180°C - 200°C (depending on seal setup and media)
• Maximum Operating Pressure: Up to 1.5 MPa (~15 bar)
• Maximum Rotation Speed: 800 - 1500 RPM (depending on port size)
• Connection Standard: JIS / RC Standard Thread (or optional NPT)

DETAILED MODEL DESIGNATIONS:
• RXE 2120 / RXE-2120: Duplex dual-passage rotary joint with internal circulation, nominal port size 20A (3/4").
• RXE 3020 RH: RXE 3000 series rotary joint, nominal port size 20A (3/4"), Right-Hand Thread (RH).
• RXE 3020 LH: RXE 3000 series rotary joint, nominal port size 20A (3/4"), Left-Hand Thread (LH).
• RXE 3015 RH: RXE 3000 series rotary joint, nominal port size 15A (1/2"), Right-Hand Thread (RH).
• RXE 3015 LH: RXE 3000 series rotary joint, nominal port size 15A (1/2"), Left-Hand Thread (LH).

DESIGNATION SYSTEM NOTES:
• 15 / 20: Nominal port diameters corresponding to 15A (1/2 inch) and 20A (3/4 inch).
• RH (Right Hand): Clockwise rotation tightening direction.
• LH (Left Hand): Counter-clockwise rotation tightening direction.
• 21xx / 30xx: Single-passage or dual-passage internal circulation design codes.