Water rotary union YZA series

for continuous casting applicationsfor high-temperature applicationsfor rollers

Overview
The YZA and YZB Series rotary joints are engineered for continuous casting and rolling equipment in steel production. They provide sealed rotary fluid transfer for caster cooling rolls, combining a roll-embedded body and advanced mechanical sealing to meet metallurgical production demands. Field-proven as direct replacements for imported equivalents, they enable retrofit without piping modification.

Short Description

• Special rotary joint for metallurgical continuous casting rolls.
• YZA-20D / YZA-20S models: up to 230°C, 1.2 MPa, 60 rpm; 10 mm axial compensation; 0.1° deflection angle for high-temperature caster rolls.
• YZB-20S model: up to 120°C, 1.2 MPa, 60 rpm; optimized for water and coolant media in standard casting lines.
• Roll-embedded design: joint body housed inside the roll, only the pipeline flange is external to save axial space.
• Inverted internal seal: replaces traditional axial seals and integrates the housing for faster disassembly and maintenance.
• Import replacement: compatible with existing piping to directly replace imported unions and reduce procurement cost.

Structural Advantages

• Compact roll-embedded design minimizes axial projection and saves space between roll and piping.
• Balanced mechanical seal with high-temperature and wear-resistant sealing elements for reliable sealing performance.
• Inverted internal sealing structure shortens axial length and facilitates easier assembly, disassembly and maintenance.

Application & Media

• Designed for cooling rolls in continuous casting and rolling lines at iron and steel plants.
• Protects rolls and contributes to improved surface quality of slabs, billets and bars.
• Compatible media: water and typical coolants used in metallurgical cooling systems.

Model Specifications
YZA Series (High-Temperature Applications)

• Operating conditions: Max working pressure 1.2 MPa | Test pressure 1.8 MPa | Max temperature 230°C | Max speed 60 rpm | Axial compensation 10 mm | Deflection angle 0.1°
• Applicable media: Water, coolant
• Sub-models: YZA-20D-01, YZA-20D-02, YZA-20D-03, YZA-20S-01, YZA-20S-02

YZB Series (Standard Applications)

• Operating conditions: Max working pressure 1.2 MPa | Test pressure 1.8 MPa | Max temperature 120°C | Max speed 60 rpm | Axial compensation 10 mm | Deflection angle 0.1°
• Applicable media: Water, coolant

Technical specifications

• Series: YZA (high-temp) and YZB (standard)
• Max working pressure: 1.2 MPa
• Test pressure: 1.8 MPa
• Max temperature: YZA up to 230°C; YZB up to 120°C
• Max rotational speed: 60 rpm
• Axial compensation allowance: 10 mm
• Deflection angle: 0.1°
• Applicable media: Water, coolant
• Design features: roll-embedded body; external pipeline flange; balanced mechanical sealing; inverted internal sealing for reduced axial length and simplified maintenance
• Common sub-models (YZA): YZA-20D-01 / YZA-20D-02 / YZA-20D-03 / YZA-20S-01 / YZA-20S-02