Custom QT40 Carbon Steel Rotary Union ID 40mm Total Height 118mm for Industrial Equipment

 Product Overview

The QT40 rotary joint is a Q-type universal rotary union built with a high-strength carbon steel body. With an inner diameter of 40mm and overall height of 118mm, it follows the standard QD40 dimensional envelope for drop-in compatibility with existing equipment. It is designed to transfer steam, hot oil, and hot water between stationary supply lines and rotating machinery components.

2. Technical Specifications

• Model: QT40
• Body Material: Carbon Steel
• Inner Diameter: 40 mm (R1-1/2 / Rc1-1/2 thread)
• Overall Height: 118 mm
• Max. Pressure: 1.8 MPa
• Max. Temperature: 220°C
• Max. Speed: 200 RPM
• Seal Type: Spherical graphite auto-compensating seal
• Bearing: Dual oil-free bearing support

3. Key Features

• Leak-Free Operation: Spherical seal ring automatically compensates for wear, maintaining tight sealing throughout the product lifespan
• Low Torque Rotation: Precision-machined components minimize friction, protecting your equipment’s drive system
• Self-Centering: Spherical seal structure tolerates minor misalignment, ideal for older or non-precision equipment
• Easy Maintenance: Simple structure enables quick seal replacement without dismantling the entire assembly

4. Typical Applications

• Textile & Printing: Heat transfer oil circulation for drying cylinders and calendaring rollers
• Plastic & Rubber: Hot oil / steam delivery to rotating molds and extrusion screws
• Paper & Pulp: Steam heating for drying cylinders at ≤220°C
• Chemical & Pharmaceutical: Heat medium transfer in reactors and mixing tanks