Series 9000 Rotary Union Technical Summary

1. Operating Parameters

• Media: Steam, Hot Oil, Water
• Pressure Limits: 250 psi (Water), 175 psi (Steam), 100 psi (Hot Oil)
• Temperature Limits: Up to 600ºF (Hot Oil), 378ºF (Steam)
• Maximum Speed: 700 RPM

2. Thread and Connection Options

• Thread Types: NPT, BSPP, Metric (on request)
• Thread Sizes: Female threads available in NPT and BSPP
• Flanged Versions: Available for various nominal sizes

3. Materials and Construction

• Housing: Cast Iron with Stainless Steel Sleeve
• Shaft: Steel

4. Configurations

• Mono Flow and Dual Flow configurations available
• Dual flow includes stationary and rotating siphon options

5. Features and Benefits

• Advanced Bellows Sealing System: Provides superior sealing performance and wear life compared to spring-based seals, with better resistance to debris build-up in contaminated media.
• Superior Alignment: Dual bearings on sizes above 1 1/4" ensure better shaft alignment and durability.
• Easy Mounting: Flange mounts directly to machine journal for concentric mounting, reducing overhang and bearing load, enhancing service life.

6. Dimensional Data and References

The document provides detailed dimensional tables for various nominal sizes ranging from 1/4" to 5" including parameters such as A, B, C, D, E, F, G, V, W, O, Y, X, J, K, S, H, L, P depending on configuration and flow type. These dimensions are given in both inches and millimeters for:

• Mono flow rotary unions (1/4" to 3")
• Dual flow stationary and rotating siphons (1/2" to 3")
• Flanged versions for mono and dual flow
• Compression siphon dual flow (1/4" to 1")

7. Performance Charts

Pressure vs. RPM charts are provided for different media (Water, Air, Hot Oil, Steam) and nominal sizes (1/4" to 5"). These charts illustrate the operating pressure limits at various rotational speeds, helping to select the appropriate rotary union size and configuration for specific operating conditions.

8. Recommendations and Limitations

• Operating pressures and temperatures must not exceed specified limits to ensure safety and longevity.
• Selection of thread type and size should match machine and piping requirements; custom threads available on request.
• Use of dual bearings recommended for sizes above 1 1/4" for enhanced alignment and durability.
• Flanged mounting recommended for ease of installation and improved mechanical stability.

9. Contact Information

For orders, technical support, or custom configurations, contact Duff Norton France:

• Email: [email protected]
• Website: www.duffnorton.fr
• Phone: +33 (0) 3 23 70 70 00
• Fax: +33 (0) 3 23 70 70 10

Summary

The Series 9000 rotary unions are robust, versatile components designed for transferring steam, hot oil, and water under moderate pressure and temperature conditions. Their advanced bellows sealing system and dual bearing alignment provide reliable performance and resistance to contamination. Multiple configurations and thread options allow adaptation to various industrial applications, with detailed dimensional and performance data supporting precise selection and installation.