Kadant Johnson RX rotary unions

• Brand: Kadant Johnson
• Model Numbers: 4250RXB2N (2-1/2") and 4300RXB2N (3") RX Rotary Unions
• Type: Rotary Unions with bushings (right-hand configuration)
• Port Sizes: 1-1/2" and 3"
• Certified Genuine Parts with OEM Kadant Johnson approval
• Shipping Weight: Approx. 215 lbs (container with multiple units)
• Package Dimensions: 32" length × 18" width × 47" height

Description

Kadant Johnson RX rotary unions are precision-engineered components designed for transferring steam, water, or thermal oil into and out of rotating equipment. These unions are built for high durability and long service life in demanding industrial environments. The RX line uses a self-aligning, external carbon guide system that maintains tight sealing under rotation, ensuring efficiency and reliability.

What It Does

A rotary union allows a fluid (such as steam, water, or oil) to pass from a stationary supply line into a rotating drum, cylinder, or roll. The RXB2N models provide reliable sealing and rotation under pressure and temperature, making them critical for applications where thermal media must be delivered into rotating machinery.

Capabilities

• Handles steam, hot water, or thermal oil at high temperatures and pressures.
• Operates at high rotational speeds with low torque requirements.
• Self-supporting design reduces wear and extends lifespan.
• Capable of handling varying alignment conditions without performance loss.

Core Functions

• Transmits heat-transfer media into rotating rolls or drums.
• Provides tight sealing between stationary piping and rotating equipment.
• Ensures reliable, uninterrupted flow during machine operation.
• Reduces maintenance intervals with durable sealing technology.

Design Features & Benefits

• External carbon guide design improves stability and minimizes seal wear.
• Self-supporting construction eliminates the need for additional supports.
• Heavy-duty build designed for industrial reliability and long-term use.
• OEM-certified genuine Kadant Johnson parts ensure compatibility and performance.
• Right-hand configuration designed for seamless integration with existing setups.

Applications & Industries

• Paper and pulp manufacturing (dryer sections, rolls, calenders)
• Plastics and film extrusion (heated rolls)
• Textile industry (drying and finishing rolls)
• Printing and coating machinery
• Rubber and tire production equipment
• Any process requiring steam or thermal oil transfer into rotating rolls

Machine Overview & Summary

The Kadant Johnson RX Rotary Union (4250RXB2N and 4300RXB2N) represents one of the most reliable solutions for heat transfer media in rotating machinery. Built with precision and designed for demanding industrial environments, these unions ensure safe, efficient, and uninterrupted operation. With genuine OEM construction, they provide extended service life, reduced downtime, and proven performance across industries such as paper, plastics, and textiles. These rotary unions are a critical component for facilities looking to maximize production reliability and minimize maintenance costs